{"id":42194,"date":"2023-12-20T16:05:16","date_gmt":"2023-02-04T05:58:20","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e8%a9%a6%e7%94%a8%e4%ba%86postgresql-11%e7%9a%84%e6%96%b0%e5%8a%9f%e8%83%bdjit%e7%b7%a8%e8%ad%af%e3%80%82\/"},"modified":"2024-05-04T14:28:36","modified_gmt":"2024-05-04T06:28:36","slug":"%e6%88%91%e8%a9%a6%e7%94%a8%e4%ba%86postgresql-11%e7%9a%84%e6%96%b0%e5%8a%9f%e8%83%bdjit%e7%b7%a8%e8%ad%af%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e8%a9%a6%e7%94%a8%e4%ba%86postgresql-11%e7%9a%84%e6%96%b0%e5%8a%9f%e8%83%bdjit%e7%b7%a8%e8%ad%af%e3%80%82\/","title":{"rendered":"\u6211\u8a66\u7528\u4e86PostgreSQL 11\u7684\u65b0\u529f\u80fdJIT\u7de8\u8b6f"},"content":{"rendered":"<h1>\u9996\u5148<\/h1>\n<p>2018\u5e7410\u670818\u65e5\uff0cPostgreSQL 11\u53d1\u5e03\u4e86\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">PostgreSQL 11 Released<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">https:\/\/www.postgresql.org\/about\/news\/1894\/<\/ul>\n<p>\u5927\u89c4\u6a21\u6570\u636e\u5e93\u7684\u5404\u79cd\u529f\u80fd\u5f97\u5230\u4e86\u52a0\u5f3a\uff0c\u6bd4\u5982\u5e76\u884c\u67e5\u8be2\u548c\u5206\u533a\u7b49\u7b49\u3002\u4eca\u5929\u6211\u8981\u5206\u4eab\u7684\u662f\u5176\u4e2d\u4e00\u4e2a\u6211\u4e2a\u4eba\u7279\u522b\u5173\u6ce8\u7684\u3001\u5e76\u4e14\u6784\u5efa\u8d77\u6765\u6bd4\u8f83\u56f0\u96be\u7684JIT\u7f16\u8bd1\u529f\u80fd\u7684\u9a8c\u8bc1\u5185\u5bb9\u3002<\/p>\n<p>\u5728\u64b0\u5199\u672c\u6587\u65f6\uff0c\u6211\u53c2\u8003\u4e86\u5404\u79cd\u4fe1\u606f\uff0c\u5e76\u9644\u4e0a\u4e86\u76f8\u5e94\u7684\u94fe\u63a5\u3002<br \/>\n\u7136\u800c\uff0c\u90e8\u5206\u94fe\u63a5\u662f\u5173\u4e8ePostgreSQL 11\u6d4b\u8bd5\u7248\u7684\u9a8c\u8bc1\u4fe1\u606f\u3002<br \/>\n\u8bf7\u6ce8\u610f\uff0c\u548c\u6b63\u5f0f\u53d1\u5e03\u7684PostgreSQL 11\u53ef\u80fd\u5b58\u5728\u4e0d\u540c\u7684\u7ed3\u679c\u3002<\/p>\n<h1>\u5f15\u5165JIT\u7f16\u8bd1<\/h1>\n<p>\u5373\u4f7f\u6b63\u5e38\u5b89\u88c5\u4e86PostgreSQL 11\uff0c\u4e5f\u4e0d\u4e00\u5b9a\u53ef\u4ee5\u4f7f\u7528JIT\u7f16\u8bd1\u3002<br \/>\n\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u9700\u8981\u5b89\u88c5\u672a\u5b89\u88c5\u7684\u5e93\u7b49\u3002<\/p>\n<h2>\u5982\u679c\u4ece\u6e90\u4ee3\u7801\u6784\u5efaPostgreSQL<\/h2>\n<p>\u5982\u679c\u8981\u4ece\u6e90\u4ee3\u7801\u642d\u5efaPostgreSQL\uff0c\u9700\u8981\u5148\u5b89\u88c5LLVM\u3002 \uff08CentOS 7\u7b49\u9ed8\u8ba4\u5b89\u88c5\u4e86LLVM\uff0c\u4f46\u7248\u672c\u8f83\u65e7\uff0c\u9700\u8981\u8fdb\u884c\u8c03\u6574\uff09<\/p>\n<p>\u5728\u7f16\u8bd1\u65f6\uff0c\u9700\u8981\u660e\u786e\u4f7f\u7528LLVM\u4f5c\u4e3a\u9009\u9879\u3002<\/p>\n<p>\u4ece\u6e90\u4ee3\u7801\u6784\u5efa\u5e76\u5f15\u5165LLVM\u7684\u6b65\u9aa4\u5728\u8be6\u7ec6\u7684\u5efa\u7acb\u548c\u9a8c\u8bc1\u7f51\u7ad9\u4e0a\u6709\u8bf4\u660e\u3002\u7136\u800c\uff0c\u4ee5\u4e0b\u4fe1\u606f\u662f\u5173\u4e8ePostgreSQL 11\u6d4b\u8bd5\u7248\u7684\u4fe1\u606f\u3002\u8bf7\u6ce8\u610f\uff0c\u76ee\u524d\u53ef\u80fd\u5b58\u5728\u5347\u7ea7\u6240\u9700LLVM\u7248\u672c\u7684\u60c5\u51b5\u3002<\/p>\n<h2>\u5982\u679c\u4eceRPM\u5b89\u88c5PostgreSQL\u7684\u8bdd<\/h2>\n<p>\u4ee5\u524d\u6211\u5199\u8fc7\u4e00\u7bc7\u6587\u7ae0\uff08\u63a8\u5e7f\uff09\u5173\u4e8e\u4f7f\u7528RPM\u5b89\u88c5PostgreSQL\u3002<br \/>\n\u8bf7\u53c2\u8003\u8fd9\u7bc7\u6587\u7ae0\u83b7\u53d6\u8be6\u7ec6\u7684\u5b89\u88c5\u6b65\u9aa4\u3002<br \/>\n\u9002\u7528\u4e8e\u521d\u5b66\u8005\u548c\u6ce8\u91cd\u7ec6\u8282\u7684\u7528\u6237\u4eceRPM\u5b89\u88c5PostgreSQL\u3002<\/p>\n<h3>\u5728\u7ebf\u73af\u5883\u4e0b<\/h3>\n<p>\u901a\u8fc7\u4e0a\u8ff0\u6587\u7ae0\u4ecb\u7ecd\u7684\u4eceRPM\u5b89\u88c5PostgreSQL\uff0c\u53ef\u4ee5\u4f7f\u7528JIT\u652f\u6301\u7684\u6784\u5efa\u3002\u4f46\u662f\u7531\u4e8e\u64cd\u4f5c\u7cfb\u7edf\u4e0a\u7684LLVM\u7248\u672c\u53ef\u80fd\u65e0\u6cd5\u6b63\u786e\u914d\u5408\uff0c\u6240\u4ee5\u9700\u8981\u6ce8\u610f\u3002<\/p>\n<p>\u6709\u5173LLVM\u7248\u672c\u5347\u7ea7\u7684\u65b9\u6cd5\uff0c\u8bf7\u53c2\u8003\u672c\u7f51\u7ad9\u63d0\u4f9b\u7684\u5efa\u8bbe\u548c\u9a8c\u8bc1\u76f8\u5173\u5185\u5bb9\u7684\u94fe\u63a5\u3002<\/p>\n<h3>\u5728\u79bb\u7ebf\u73af\u5883\u4e0b<\/h3>\n<p>LLVM\u53ef\u4ee5\u4eceEPEL\uff08Linux\u6269\u5c55\u5305\uff09\u83b7\u53d6\u3002<br \/>\n\u8fd9\u6b21\u6211\u4eec\u5c06\u83b7\u53d65.0\u6216\u4ee5\u4e0a\u7684\u7248\u672c\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">EPEL\/ja<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">https:\/\/fedoraproject.org\/wiki\/EPEL\/ja<\/ul>\n<p>\u5728\u79bb\u7ebf\u73af\u5883\u4e0b\uff0c\u53ef\u4ee5\u76f4\u63a5\u4ece\u4e0a\u8ff0\u7684\u7f51\u7ad9\u83b7\u53d6\u6240\u9700\u7684RPM\uff0c\u5e76\u5c06\u5176\u5b89\u88c5\u5728\u76ee\u6807\u73af\u5883\u4e2d\u3002<\/p>\n<p>\u5728CentOS 7\u4e0a\uff0c<br \/>\n\u4ecehttps:\/\/dl.fedoraproject.org\/pub\/epel\/7\/x86_64\/Packages\/l\/<br \/>\n\u4e0b\u8f7d&#8221;llvm5.0-libs-5.0.1-7.el7.x86_64.rpm&#8221;\u548c&#8221;llvm5.0-5.0.1-7.el7.x86_64.rpm&#8221;\u3002<\/p>\n<pre class=\"post-pre\"><code>yum <span class=\"nb\">install <\/span>llvm5.0-libs-5.0.1-7.el7.x86_64.rpm\r\nyum <span class=\"nb\">install <\/span>llvm5.0-5.0.1-7.el7.x86_64.rpm\r\n<\/code><\/pre>\n<p>\u4ece\u4ee5\u4e0b\u7f51\u7ad9\u9009\u62e9\u9002\u5f53\u7684\u64cd\u4f5c\u7cfb\u7edf\u884c\u548c\u7248\u672c\u53f7\uff0c\u60a8\u53ef\u4ee5\u627e\u5230\u6240\u6709\u4e0ePostgreSQL\u76f8\u5173\u7684RPM\u5305\u3002\u7136\u540e\u83b7\u53d6LLVM\u76f8\u5173\u7684RPM\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">PostgreSQL RPM Chart<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">https:\/\/yum.postgresql.org\/rpmchart.php<\/ul>\n<p>\u5728CentOS 7\u73af\u5883\u4e2d\uff0c\u4e0b\u8f7dPostgreSQL 11\u7684\u6587\u4ef6\u300cpostgresql11-llvmjit-11.0-1PGDG.rhel7.x86_64.rpm\u300d\uff0c\u94fe\u63a5\u4e3ahttps:\/\/download.postgresql.org\/pub\/repos\/yum\/11\/redhat\/rhel-7.4-x86_64\/\u3002<\/p>\n<pre class=\"post-pre\"><code>yum <span class=\"nb\">install <\/span>postgresql11-llvmjit-11.0-1PGDG.rhel7.x86_64.rpm\r\n<\/code><\/pre>\n<p>\u8fd9\u6837\u4e00\u6765\uff0c\u5c31\u6210\u4e3a\u4e86\u80fd\u591f\u4f7f\u7528JIT\u7f16\u8bd1\u7684\u73af\u5883\u3002<\/p>\n<h1>\u8ba9\u6211\u4eec\u5b9e\u9645\u5c1d\u8bd5\u4f7f\u7528\u4e00\u4e0b<\/h1>\n<p>\u5373\u4f7fJIT\u7f16\u8bd1\u53ef\u4ee5\u4f7f\u7528\uff0c\u4e5f\u5e76\u975e\u7acb\u5373\u53ef\u7528\u3002<br \/>\n\u9700\u8981\u8c03\u6574\u76f8\u5173\u53c2\u6570\u3002<\/p>\n<p>\u5173\u4e8e\u53c2\u6570\u95ee\u9898\uff0c\u6211\u4eec\u6709\u624b\u518c\u548cPostgreSQL 11\u6765\u5e2e\u5fd9\uff01\uff081\uff09- \u53c2\u8003\u4e86\u53c2\u6570\u5dee\u5f02\u7684\u6587\u7ae0\u3002<br \/>\n\u9664\u4e86JIT\u76f8\u5173\u5185\u5bb9\u5916\uff0c\u7531\u4e8ePostgreSQL 11\u589e\u52a0\/\u4fee\u6539\u4e86\u53c2\u6570\u7684\u8bf4\u660e\uff0c\u5bf9\u4e8ePostgreSQL\u76f8\u5173\u4eba\u5458\u6765\u8bf4\u662f\u5fc5\u770b\u7684\u3002<br \/>\n\u53e6\u5916\uff0c\u6b63\u5982\uff081\uff09\u4e2d\u6240\u8ff0\uff0c\u4f5c\u8005\u306c\u3053\uff20\u6a2a\u6d5c\u5148\u751f\u64b0\u5199\u4e86\u8bb8\u591a\u5173\u4e8e11\u7248\u672c\u7684\u6587\u7ae0\u3002<br \/>\n\u6211\u4e2a\u4eba\u5728PostgreSQL 11\u9a8c\u8bc1\u4e2d\u4e5f\u53c2\u8003\u4e86\u8fd9\u4e9b\u6587\u7ae0\uff0c\u6240\u4ee5\u5f3a\u70c8\u63a8\u8350\uff08\u4ee3\u4f20\uff09\u3002<\/p>\n<h2>JIT\u76f8\u5173\u7684\u53c2\u6570<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4f7f\u7528JIT\u7f16\u8bd1\u6240\u9700\u7684\u53c2\u6570\u96c6\u3002<br \/>\n\u5176\u4e2djit_above_cost\u3001jit_inline_above_cost\u548cjit_optimize_above_cost\u8fd9\u4e09\u4e2a\u53c2\u6570\u5177\u6709\u8f83\u5f3a\u7684\u5173\u8054\u6027\u3002<br \/>\n\u60a8\u53ef\u4ee5\u901a\u8fc7\u4fee\u6539\u8fd9\u4e9b\u53c2\u6570\u6765\u6b63\u786e\u4f7f\u7528JIT\u7f16\u8bd1\u3002<\/p>\n<div>\n<div class=\"post-table\">\u30d1\u30e9\u30e1\u30fc\u30bf\u540d\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u8aac\u660ejitoffJIT\u30b3\u30f3\u30d1\u30a4\u30eb\u306e\u4f7f\u7528\u53ef\u80fd\u306b\u3059\u308b\u304b\u3092\u6c7a\u3081\u307e\u3059\u3002<br \/>\n<strong>\u30d9\u30fc\u30bf\u7248\u3067\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u3067on\u3067\u3057\u305f\u304c\u3001\u6b63\u5f0f\u7248\u3067\u306foff\u304c\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u3059\u3002<\/strong>jit_above_cost100000JIT\u30b3\u30f3\u30d1\u30a4\u30eb\u304c\u4f7f\u7528\u3055\u308c\u308b\u304b\u3092\u6c7a\u3081\u308b\u30b3\u30b9\u30c8\u306e\u95be\u5024\u3067\u3059\u3002<br \/>\n\u30af\u30a8\u30ea\u306e\u63a8\u5b9a\u30b3\u30b9\u30c8\u304c\u672c\u5024\u3092\u8d85\u3048\u308b\u3068\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<br \/>\n\u5024\u304c-1\u306e\u5834\u5408\u3001\u7121\u52b9\u5316\u3055\u308c\u307e\u3059\u3002jit_inline_above_cost500000JIT\u30b3\u30f3\u30d1\u30a4\u30eb\u4f7f\u7528\u5f8c\u306b\u3001\u30a4\u30f3\u30e9\u30a4\u30f3\u5c55\u958b\u3059\u308b\u304b\u3092\u6c7a\u3081\u308b\u95be\u5024\u3067\u3059\u3002<br \/>\nJIT\u30b3\u30f3\u30d1\u30a4\u30eb\u306e\u30aa\u30fc\u30d0\u30d8\u30c3\u30c9\u306f\u5897\u52a0\u3057\u307e\u3059\u304c\u3001\u30af\u30a8\u30ea\u5b9f\u884c\u6642\u9593\u306f\u6e1b\u308a\u307e\u3059\u3002<br \/>\n\u30af\u30a8\u30ea\u306e\u63a8\u5b9a\u30b3\u30b9\u30c8\u304c\u672c\u5024\u3092\u8d85\u3048\u308b\u3068\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<br \/>\n\u5024\u304c-1\u306e\u5834\u5408\u3001\u7121\u52b9\u5316\u3055\u308c\u307e\u3059\u3002jit_optimize_above_cost500000\u30a4\u30f3\u30e9\u30a4\u30f3\u5c55\u958b\u5f8c\u3001\u9ad8\u4fa1\u306a\u6700\u9069\u5316\u3092\u3059\u308b\u304b\u6c7a\u3081\u308b\u95be\u5024\u3067\u3059\u3002<br \/>\nJIT\u30b3\u30f3\u30d1\u30a4\u30eb\u306e\u30aa\u30fc\u30d0\u30d8\u30c3\u30c9\u306f\u5897\u52a0\u3057\u307e\u3059\u304c\u3001\u30af\u30a8\u30ea\u5b9f\u884c\u6642\u9593\u306f\u6e1b\u308a\u307e\u3059\u3002<br \/>\n\u30af\u30a8\u30ea\u306e\u63a8\u5b9a\u30b3\u30b9\u30c8\u304c\u672c\u5024\u3092\u8d85\u3048\u308b\u3068\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<br \/>\n\u5024\u304c-1\u306e\u5834\u5408\u3001\u7121\u52b9\u5316\u3055\u308c\u307e\u3059\u3002jit_providerllvmjit\u4f7f\u7528\u3059\u308bJIT\u30d7\u30ed\u30d1\u30a4\u30c0\u3092\u6c7a\u5b9a\u3057\u307e\u3059\u3002<br \/>\n\u73fe\u5728\u306fLLVM\u306e\u307f\u5bfe\u5fdc\u3057\u3066\u3044\u308b\u305f\u3081\u5909\u66f4\u306e\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/div>\n<\/div>\n<p>\u9664\u4e86\u8fd9\u4e2a\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u4f9b\u5f00\u53d1\u8005\u4f7f\u7528\u7684\u53c2\u6570\uff0c\u4f46\u6211\u8ba4\u4e3a\u5728\u6b63\u5e38\u8fd0\u8425\u65f6\u4e0d\u9700\u8981\u7279\u522b\u5173\u6ce8\u3002<\/p>\n<h2>\u5c1d\u8bd5\u66f4\u6539\u53c2\u6570\u5e76\u4f7f\u7528JIT\u7f16\u8bd1<\/h2>\n<p>\u53ea\u8981\u964d\u4f4eJIT\u7f16\u8bd1\u7684\u53ef\u7528\u9608\u503c\uff0c\u901a\u8fc7\u67e5\u770b\u4e0eJIT\u76f8\u5173\u7684\u53c2\u6570\u5373\u53ef\u660e\u767d\uff0c\u6211\u4eec\u53ef\u4ee5\u6682\u65f6\u4f7f\u7528JIT\u7f16\u8bd1\u3002<\/p>\n<p>\u9996\u5148\uff0c\u521b\u5efa\u4e00\u4e2a\u7528\u4e8e\u6d4b\u8bd5\u4f7f\u7528JIT\u7f16\u8bd1\u7684\u8868\u683c\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">CREATE<\/span> <span class=\"k\">TABLE<\/span> <span class=\"n\">jit_test<\/span> <span class=\"p\">(<\/span><span class=\"n\">a<\/span> <span class=\"nb\">INTEGER<\/span><span class=\"p\">,<\/span> <span class=\"n\">b<\/span> <span class=\"nb\">TEXT<\/span><span class=\"p\">);<\/span>\r\n\r\n<span class=\"k\">INSERT<\/span> <span class=\"k\">INTO<\/span> <span class=\"n\">jit_test<\/span> <span class=\"p\">(<\/span><span class=\"n\">a<\/span><span class=\"p\">,<\/span> <span class=\"n\">b<\/span><span class=\"p\">)<\/span>\r\n<span class=\"k\">SELECT<\/span> <span class=\"k\">g<\/span><span class=\"p\">,<\/span> <span class=\"n\">md5<\/span><span class=\"p\">(<\/span><span class=\"k\">g<\/span><span class=\"p\">::<\/span><span class=\"nb\">text<\/span><span class=\"p\">)<\/span> <span class=\"k\">FROM<\/span> <span class=\"n\">generate_series<\/span><span class=\"p\">(<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"mi\">50000<\/span><span class=\"p\">)<\/span> <span class=\"k\">AS<\/span> <span class=\"k\">g<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<p>\u4e3a\u4e86\u5f3a\u5236\u6267\u884cJIT\u7f16\u8bd1\uff0c\u6211\u4eec\u9700\u8981\u542f\u7528JIT\u7f16\u8bd1\u5e76\u964d\u4f4e\u76f8\u5173\u53c2\u6570\u7684\u9608\u503c\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">SET<\/span> <span class=\"n\">jit<\/span><span class=\"o\">=<\/span><span class=\"k\">on<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">SET<\/span> <span class=\"n\">jit_above_cost<\/span><span class=\"o\">=<\/span><span class=\"mi\">10<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">SET<\/span> <span class=\"n\">jit_inline_above_cost<\/span><span class=\"o\">=<\/span><span class=\"mi\">10<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">SET<\/span> <span class=\"n\">jit_optimize_above_cost<\/span><span class=\"o\">=<\/span><span class=\"mi\">10<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<p>\u6709\u4e86\u8fd9\u4e2a\uff0c\u5c31\u51c6\u5907\u597d\u4f7f\u7528JIT\u7f16\u8bd1\u4e86\u3002<br \/>\n\u5728PostgreSQL 11\u4e2d\uff0cJIT\u7f16\u8bd1\u7528\u4e8eWHERE\u5b50\u53e5\u548c\u805a\u5408\u7b49\u529f\u80fd\u3002<br \/>\n(\u8bf7\u53c2\u8003\u4ee5\u4e0b\u624b\u518c\u4e2d\u7684\u8be6\u7ec6\u4fe1\u606f)<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">32.1.1. JIT Accelerated Operations<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">https:\/\/www.postgresql.org\/docs\/11\/static\/jit-reason.html#JIT-ACCELERATED-OPERATIONS<\/ul>\n<p>\u56e0\u6b64\uff0c\u6211\u5011\u6703\u5728SQL\u8a9e\u53e5\u4e2d\u6dfb\u52a0\u9069\u7576\u7684WHERE\u5b50\u53e5\uff0c\u4e26\u57f7\u884c\u8a72\u8a9e\u53e5\u4ee5\u67e5\u770b\u57f7\u884c\u8a08\u5283\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">EXPLAIN<\/span> <span class=\"k\">ANALYZE<\/span> <span class=\"k\">SELECT<\/span> <span class=\"o\">*<\/span> <span class=\"k\">FROM<\/span> <span class=\"n\">jit_test<\/span> <span class=\"k\">WHERE<\/span> <span class=\"n\">a<\/span><span class=\"o\">%<\/span><span class=\"mi\">2<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">1<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>                                                  <span class=\"n\">QUERY<\/span> <span class=\"n\">PLAN<\/span>\r\n<span class=\"c1\">---------------------------------------------------------------------------------------------------------------<\/span>\r\n <span class=\"n\">Seq<\/span> <span class=\"n\">Scan<\/span> <span class=\"k\">on<\/span> <span class=\"n\">jit_test<\/span>  <span class=\"p\">(<\/span><span class=\"n\">cost<\/span><span class=\"o\">=<\/span><span class=\"mi\">0<\/span><span class=\"p\">.<\/span><span class=\"mi\">00<\/span><span class=\"p\">..<\/span><span class=\"mi\">1167<\/span><span class=\"p\">.<\/span><span class=\"mi\">00<\/span> <span class=\"k\">rows<\/span><span class=\"o\">=<\/span><span class=\"mi\">250<\/span> <span class=\"n\">width<\/span><span class=\"o\">=<\/span><span class=\"mi\">37<\/span><span class=\"p\">)<\/span> <span class=\"p\">(<\/span><span class=\"n\">actual<\/span> <span class=\"nb\">time<\/span><span class=\"o\">=<\/span><span class=\"mi\">71<\/span><span class=\"p\">.<\/span><span class=\"mi\">657<\/span><span class=\"p\">..<\/span><span class=\"mi\">77<\/span><span class=\"p\">.<\/span><span class=\"mi\">408<\/span> <span class=\"k\">rows<\/span><span class=\"o\">=<\/span><span class=\"mi\">25000<\/span> <span class=\"n\">loops<\/span><span class=\"o\">=<\/span><span class=\"mi\">1<\/span><span class=\"p\">)<\/span>\r\n   <span class=\"n\">Filter<\/span><span class=\"p\">:<\/span> <span class=\"p\">((<\/span><span class=\"n\">a<\/span> <span class=\"o\">%<\/span> <span class=\"mi\">2<\/span><span class=\"p\">)<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">1<\/span><span class=\"p\">)<\/span>\r\n   <span class=\"k\">Rows<\/span> <span class=\"n\">Removed<\/span> <span class=\"k\">by<\/span> <span class=\"n\">Filter<\/span><span class=\"p\">:<\/span> <span class=\"mi\">25000<\/span>\r\n <span class=\"n\">Planning<\/span> <span class=\"nb\">Time<\/span><span class=\"p\">:<\/span> <span class=\"mi\">0<\/span><span class=\"p\">.<\/span><span class=\"mi\">044<\/span> <span class=\"n\">ms<\/span>\r\n <span class=\"n\">JIT<\/span><span class=\"p\">:<\/span>\r\n   <span class=\"n\">Functions<\/span><span class=\"p\">:<\/span> <span class=\"mi\">2<\/span>\r\n   <span class=\"k\">Options<\/span><span class=\"p\">:<\/span> <span class=\"n\">Inlining<\/span> <span class=\"k\">true<\/span><span class=\"p\">,<\/span> <span class=\"n\">Optimization<\/span> <span class=\"k\">true<\/span><span class=\"p\">,<\/span> <span class=\"n\">Expressions<\/span> <span class=\"k\">true<\/span><span class=\"p\">,<\/span> <span class=\"n\">Deforming<\/span> <span class=\"k\">true<\/span>\r\n   <span class=\"n\">Timing<\/span><span class=\"p\">:<\/span> <span class=\"n\">Generation<\/span> <span class=\"mi\">0<\/span><span class=\"p\">.<\/span><span class=\"mi\">443<\/span> <span class=\"n\">ms<\/span><span class=\"p\">,<\/span> <span class=\"n\">Inlining<\/span> <span class=\"mi\">50<\/span><span class=\"p\">.<\/span><span class=\"mi\">772<\/span> <span class=\"n\">ms<\/span><span class=\"p\">,<\/span> <span class=\"n\">Optimization<\/span> <span class=\"mi\">12<\/span><span class=\"p\">.<\/span><span class=\"mi\">781<\/span> <span class=\"n\">ms<\/span><span class=\"p\">,<\/span> <span class=\"n\">Emission<\/span> <span class=\"mi\">7<\/span><span class=\"p\">.<\/span><span class=\"mi\">972<\/span> <span class=\"n\">ms<\/span><span class=\"p\">,<\/span> <span class=\"n\">Total<\/span> <span class=\"mi\">71<\/span><span class=\"p\">.<\/span><span class=\"mi\">969<\/span> <span class=\"n\">ms<\/span>\r\n <span class=\"n\">Execution<\/span> <span class=\"nb\">Time<\/span><span class=\"p\">:<\/span> <span class=\"mi\">86<\/span><span class=\"p\">.<\/span><span class=\"mi\">891<\/span> <span class=\"n\">ms<\/span>\r\n<span class=\"p\">(<\/span><span class=\"mi\">9<\/span> <span class=\"err\">\u884c<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<p>\u300cJIT:\u300d\u4ece\u4e0b\u9762\u7684\u884c\u53ef\u4ee5\u770b\u51fa\uff0c\u4f7f\u7528\u4e86JIT\u7f16\u8bd1\u3002<br \/>\n\u7531\u4e8e\u6b64\u6b21\u5f3a\u884c\u964d\u4f4e\u4e86\u9608\u503c\u5e76\u4f7f\u7528\u4e86JIT\u7f16\u8bd1\uff0c\u56e0\u6b64\u6027\u80fd\u4e0b\u964d\u4e86\u4e0e\u672a\u4f7f\u7528JIT\u7f16\u8bd1\u65f6\u76f8\u6bd4\u3002<br \/>\n\u8fd9\u662f\u56e0\u4e3a\u8d85\u51fa\u5f00\u9500\u7684\u6210\u672c\u8d85\u8fc7\u4e86JIT\u7f16\u8bd1\u7684\u52a0\u901f\u6548\u679c\u3002<br \/>\n\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u5728\u4e0b\u4e00\u8282\u4e2d\u8c03\u67e5\u548c\u9a8c\u8bc1JIT\u7f16\u8bd1\u5728\u5b9e\u9645\u60c5\u51b5\u4e0b\u7684\u6709\u6548\u6027\u3002<\/p>\n<h1>\u6211\u8bd5\u56fe\u9a8c\u8bc1\u6027\u80fd\u3002<\/h1>\n<p>JIT\u7f16\u8bd1\u6267\u884c\u67e5\u8be2\u4e0d\u4e00\u5b9a\u6bd4\u5e38\u89c4\u67e5\u8be2\u6267\u884c\u5feb\u3002<br \/>\n\u5982\u679c\u7531\u4e8eJIT\u7f16\u8bd1\u5bfc\u81f4\u7684\u5f00\u9500\u589e\u52a0\uff0c\u5b83\u53ef\u80fd\u6bd4\u5e38\u89c4\u67e5\u8be2\u66f4\u6162\u3002<br \/>\n\u4e3b\u8981\u9002\u7528\u4e8e\u7531\u4e8eCPU\u6210\u4e3a\u74f6\u9888\u800c\u9700\u8981\u63d0\u901f\u7684\u67e5\u8be2\uff0c\u800cI\/O\u65b9\u9762\u6ca1\u6709\u95ee\u9898\u3002<br \/>\n\u6362\u53e5\u8bdd\u8bf4\uff0c\u9002\u5408\u5305\u542b\u590d\u6742\u805a\u5408\u6216\u8ba1\u7b97\u5904\u7406\u7684SQL\u5904\u7406\u3002<\/p>\n<p>\u56e0\u6b64\uff0c\u6211\u4eec\u9009\u62e9\u4e86TPC-H\u57fa\u51c6\u6d4b\u8bd5\u8fdb\u884c\u672c\u6b21\u6d4b\u8bd5\u3002<\/p>\n<h2>\u5f15\u5165TPC-H\u57fa\u51c6\u6d4b\u8bd5<\/h2>\n<p>TPC-H\u57fa\u51c6\u6d4b\u8bd5\u53ef\u4ee5\u4eceTPC\u7684\u7f51\u7ad9\u4e0a\u83b7\u5f97\u3002<br \/>\n\u4f46\u662f\u7531\u4e8e\u6ca1\u6709\u4e3aPostgreSQL\u8fdb\u884c\u914d\u7f6e\uff0c\u56e0\u6b64\u9700\u8981\u8fdb\u884c\u8c03\u6574\u3002<br \/>\n\u672c\u6587\u5c06\u4e0d\u4ecb\u7ecd\u5b89\u88c5\u6b65\u9aa4\u3002<br \/>\n\u5982\u679c\u60a8\u60f3\u4e86\u89e3\u66f4\u591a\u8be6\u7ec6\u4fe1\u606f\uff0c\u8bf7\u53c2\u8003\u53c2\u8003\u7f51\u7ad9\u4e0a\u5173\u4e8eTPC-H\u7684PostgreSQL\u5b89\u88c5\u94fe\u63a5\u3002<\/p>\n<p>\u672c\u6b21\u6211\u4eec\u4f7f\u7528\u4e8610GB\u7684\u6d4b\u8bd5\u6570\u636e\u8fdb\u884c\u9a8c\u8bc1\u3002<\/p>\n<pre class=\"post-pre\"><code>.\/dbgen <span class=\"nt\">-s<\/span> 10\r\n<\/code><\/pre>\n<p>\u6211\u4eec\u521b\u5efa\u4e86\u4ee5\u4e0b\u73af\u5883\u7528\u4e8e\u9a8c\u8bc1\u3002(\u7531\u4e8eTPC-H\u63d0\u4f9b\u7684SQL\u5047\u8bbe\u4e86TPCD\u6a21\u5f0f\u4e2d\u5b58\u5728\u5bf9\u8c61)<\/p>\n<pre class=\"post-pre\"><code><span class=\"o\">=#<\/span> <span class=\"k\">CREATE<\/span> <span class=\"k\">ROLE<\/span> <span class=\"n\">tpcd<\/span><span class=\"p\">;<\/span>\r\n<span class=\"o\">=#<\/span> <span class=\"k\">ALTER<\/span> <span class=\"k\">ROLE<\/span> <span class=\"n\">tpcd<\/span> <span class=\"n\">LOGIN<\/span> <span class=\"n\">SUPERUSER<\/span> <span class=\"n\">CREATEROLE<\/span> <span class=\"k\">CREATEDB<\/span> <span class=\"k\">CONNECTION<\/span> <span class=\"k\">LIMIT<\/span> <span class=\"o\">-<\/span><span class=\"mi\">1<\/span> <span class=\"n\">PASSWORD<\/span> <span class=\"s1\">'password'<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"o\">=#<\/span> <span class=\"k\">CREATE<\/span> <span class=\"k\">DATABASE<\/span> <span class=\"n\">tpcd<\/span> <span class=\"k\">OWNER<\/span> <span class=\"n\">tpcd<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"o\">=#<\/span> <span class=\"err\">\\<\/span><span class=\"k\">c<\/span> <span class=\"n\">tpcd<\/span> <span class=\"n\">tpcd<\/span>\r\n<span class=\"o\">=#<\/span> <span class=\"k\">CREATE<\/span> <span class=\"k\">SCHEMA<\/span> <span class=\"n\">tpcd<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<p>\u53e6\u5916\uff0c\u6211\u5011\u4f7f\u7528\u4ee5\u4e0b\u7684\u865b\u64ec\u74b0\u5883\u4f86\u9032\u884c\u9a57\u8b49\u3002<\/p>\n<div>\n<div class=\"post-table\">OS\u30e1\u30e2\u30eaCPUCentOS 7.44GB2\u30b3\u30a2<\/div>\n<\/div>\n<h2>\u6839\u636eJIT\u7f16\u8bd1\u7684\u6709\u65e0\u8fdb\u884c\u6027\u80fd\u6bd4\u8f83\u3002<\/h2>\n<p>\u6211\u4eec\u5c06\u4f7f\u7528TPC-H\u7684\u67e5\u8be21\u6765\u6bd4\u8f83\u4f7f\u7528\u548c\u4e0d\u4f7f\u7528JIT\u7f16\u8bd1\u7684\u6027\u80fd\u3002<br \/>\n\u9996\u5148\u662f\u4e0d\u4f7f\u7528JIT\u7f16\u8bd1\u7684EXPLAIN ANALYZE\u7ed3\u679c\u3002<br \/>\n\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0cJIT\u4f7f\u7528\u662f\u5173\u95ed\u7684\uff0c\u4f46\u4e3a\u4e86\u66f4\u5bb9\u6613\u7406\u89e3\uff0c\u6211\u4eec\u7279\u610f\u5c06JIT\u8bbe\u7f6e\u4e3aOFF\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"o\">=#<\/span> <span class=\"k\">SET<\/span> <span class=\"n\">jit<\/span><span class=\"o\">=<\/span><span class=\"k\">off<\/span><span class=\"p\">;<\/span>\r\n<span class=\"o\">=#<\/span> <span class=\"k\">explain<\/span> <span class=\"k\">analyze<\/span>\r\n<span class=\"k\">select<\/span>\r\n  <span class=\"n\">l_returnflag<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"n\">l_linestatus<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"k\">sum<\/span><span class=\"p\">(<\/span><span class=\"n\">l_quantity<\/span><span class=\"p\">)<\/span> <span class=\"k\">as<\/span> <span class=\"n\">sum_qty<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"k\">sum<\/span><span class=\"p\">(<\/span><span class=\"n\">l_extendedprice<\/span><span class=\"p\">)<\/span> <span class=\"k\">as<\/span> <span class=\"n\">sum_base_price<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"k\">sum<\/span><span class=\"p\">(<\/span><span class=\"n\">l_extendedprice<\/span> <span class=\"o\">*<\/span> <span class=\"p\">(<\/span><span class=\"mi\">1<\/span> <span class=\"o\">-<\/span> <span class=\"n\">l_discount<\/span><span class=\"p\">))<\/span> <span class=\"k\">as<\/span> <span class=\"n\">sum_disc_price<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"k\">sum<\/span><span class=\"p\">(<\/span><span class=\"n\">l_extendedprice<\/span> <span class=\"o\">*<\/span> <span class=\"p\">(<\/span><span class=\"mi\">1<\/span> <span class=\"o\">-<\/span> <span class=\"n\">l_discount<\/span><span class=\"p\">)<\/span> <span class=\"o\">*<\/span> <span class=\"p\">(<\/span><span class=\"mi\">1<\/span> <span class=\"o\">+<\/span> <span class=\"n\">l_tax<\/span><span class=\"p\">))<\/span> <span class=\"k\">as<\/span> <span class=\"n\">sum_charge<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"k\">avg<\/span><span class=\"p\">(<\/span><span class=\"n\">l_quantity<\/span><span class=\"p\">)<\/span> <span class=\"k\">as<\/span> <span class=\"n\">avg_qty<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"k\">avg<\/span><span class=\"p\">(<\/span><span class=\"n\">l_extendedprice<\/span><span class=\"p\">)<\/span> <span class=\"k\">as<\/span> <span class=\"n\">avg_price<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"k\">avg<\/span><span class=\"p\">(<\/span><span class=\"n\">l_discount<\/span><span class=\"p\">)<\/span> <span class=\"k\">as<\/span> <span class=\"n\">avg_disc<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"k\">count<\/span><span class=\"p\">(<\/span><span class=\"o\">*<\/span><span class=\"p\">)<\/span> <span class=\"k\">as<\/span> <span class=\"n\">count_order<\/span>\r\n<span class=\"k\">from<\/span>\r\n  <span class=\"n\">lineitem<\/span>\r\n<span class=\"k\">where<\/span>\r\n  <span class=\"n\">l_shipdate<\/span> <span class=\"o\">&lt;=<\/span> <span class=\"nb\">date<\/span> <span class=\"s1\">'1998-12-01'<\/span> <span class=\"o\">-<\/span> <span class=\"n\">interval<\/span> <span class=\"s1\">':1'<\/span> <span class=\"k\">day<\/span>\r\n<span class=\"k\">group<\/span> <span class=\"k\">by<\/span>\r\n  <span class=\"n\">l_returnflag<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"n\">l_linestatus<\/span>\r\n<span class=\"k\">order<\/span> <span class=\"k\">by<\/span>\r\n  <span class=\"n\">l_returnflag<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"n\">l_linestatus<\/span>\r\n<span class=\"k\">LIMIT<\/span> <span class=\"mi\">1<\/span><span class=\"p\">;<\/span>\r\n\r\n                                                                            <span class=\"n\">QUERY<\/span> <span class=\"n\">PLAN<\/span>\r\n<span class=\"c1\">------------------------------------------------------------------------------------------------------------------------------------------------------------------<\/span>\r\n <span class=\"k\">Limit<\/span>  <span class=\"p\">(<\/span><span class=\"n\">cost<\/span><span class=\"o\">=<\/span><span class=\"mi\">2437688<\/span><span class=\"p\">.<\/span><span class=\"mi\">60<\/span><span class=\"p\">..<\/span><span class=\"mi\">2437688<\/span><span class=\"p\">.<\/span><span class=\"mi\">94<\/span> <span class=\"k\">rows<\/span><span class=\"o\">=<\/span><span class=\"mi\">1<\/span> <span class=\"n\">width<\/span><span class=\"o\">=<\/span><span class=\"mi\">236<\/span><span class=\"p\">)<\/span> <span class=\"p\">(<\/span><span class=\"n\">actual<\/span> <span class=\"nb\">time<\/span><span class=\"o\">=<\/span><span class=\"mi\">68884<\/span><span class=\"p\">.<\/span><span class=\"mi\">525<\/span><span class=\"p\">..<\/span><span class=\"mi\">68885<\/span><span class=\"p\">.<\/span><span class=\"mi\">261<\/span> <span class=\"k\">rows<\/span><span class=\"o\">=<\/span><span class=\"mi\">1<\/span> <span class=\"n\">loops<\/span><span class=\"o\">=<\/span><span class=\"mi\">1<\/span><span class=\"p\">)<\/span>\r\n   <span class=\"o\">-&gt;<\/span>  <span class=\"n\">Finalize<\/span> <span class=\"n\">GroupAggregate<\/span>  <span class=\"p\">(<\/span><span class=\"n\">cost<\/span><span class=\"o\">=<\/span><span class=\"mi\">2437688<\/span><span class=\"p\">.<\/span><span class=\"mi\">60<\/span><span class=\"p\">..<\/span><span class=\"mi\">2437690<\/span><span class=\"p\">.<\/span><span class=\"mi\">67<\/span> <span class=\"k\">rows<\/span><span class=\"o\">=<\/span><span class=\"mi\">6<\/span> <span class=\"n\">width<\/span><span class=\"o\">=<\/span><span class=\"mi\">236<\/span><span class=\"p\">)<\/span> <span class=\"p\">(<\/span><span class=\"n\">actual<\/span> <span class=\"nb\">time<\/span><span class=\"o\">=<\/span><span class=\"mi\">68884<\/span><span class=\"p\">.<\/span><span class=\"mi\">524<\/span><span class=\"p\">..<\/span><span class=\"mi\">68884<\/span><span class=\"p\">.<\/span><span class=\"mi\">525<\/span> <span class=\"k\">rows<\/span><span class=\"o\">=<\/span><span class=\"mi\">1<\/span> <span class=\"n\">loops<\/span><span class=\"o\">=<\/span><span class=\"mi\">1<\/span><span class=\"p\">)<\/span>\r\n         <span class=\"k\">Group<\/span> <span class=\"k\">Key<\/span><span class=\"p\">:<\/span> <span class=\"n\">l_returnflag<\/span><span class=\"p\">,<\/span> <span class=\"n\">l_linestatus<\/span>\r\n         <span class=\"o\">-&gt;<\/span>  <span class=\"n\">Gather<\/span> <span class=\"n\">Merge<\/span>  <span class=\"p\">(<\/span><span class=\"n\">cost<\/span><span class=\"o\">=<\/span><span class=\"mi\">2437688<\/span><span class=\"p\">.<\/span><span class=\"mi\">60<\/span><span class=\"p\">..<\/span><span class=\"mi\">2437690<\/span><span class=\"p\">.<\/span><span class=\"mi\">00<\/span> <span class=\"k\">rows<\/span><span class=\"o\">=<\/span><span class=\"mi\">12<\/span> <span class=\"n\">width<\/span><span class=\"o\">=<\/span><span class=\"mi\">236<\/span><span class=\"p\">)<\/span> <span class=\"p\">(<\/span><span class=\"n\">actual<\/span> <span class=\"nb\">time<\/span><span class=\"o\">=<\/span><span class=\"mi\">68884<\/span><span class=\"p\">.<\/span><span class=\"mi\">493<\/span><span class=\"p\">..<\/span><span class=\"mi\">68885<\/span><span class=\"p\">.<\/span><span class=\"mi\">228<\/span> <span class=\"k\">rows<\/span><span class=\"o\">=<\/span><span class=\"mi\">4<\/span> <span class=\"n\">loops<\/span><span class=\"o\">=<\/span><span class=\"mi\">1<\/span><span class=\"p\">)<\/span>\r\n               <span class=\"n\">Workers<\/span> <span class=\"n\">Planned<\/span><span class=\"p\">:<\/span> <span class=\"mi\">2<\/span>\r\n               <span class=\"n\">Workers<\/span> <span class=\"n\">Launched<\/span><span class=\"p\">:<\/span> <span class=\"mi\">2<\/span>\r\n               <span class=\"o\">-&gt;<\/span>  <span class=\"n\">Sort<\/span>  <span class=\"p\">(<\/span><span class=\"n\">cost<\/span><span class=\"o\">=<\/span><span class=\"mi\">2436688<\/span><span class=\"p\">.<\/span><span class=\"mi\">57<\/span><span class=\"p\">..<\/span><span class=\"mi\">2436688<\/span><span class=\"p\">.<\/span><span class=\"mi\">59<\/span> <span class=\"k\">rows<\/span><span class=\"o\">=<\/span><span class=\"mi\">6<\/span> <span class=\"n\">width<\/span><span class=\"o\">=<\/span><span class=\"mi\">236<\/span><span class=\"p\">)<\/span> <span class=\"p\">(<\/span><span class=\"n\">actual<\/span> <span class=\"nb\">time<\/span><span class=\"o\">=<\/span><span class=\"mi\">68879<\/span><span class=\"p\">.<\/span><span class=\"mi\">669<\/span><span class=\"p\">..<\/span><span class=\"mi\">68879<\/span><span class=\"p\">.<\/span><span class=\"mi\">670<\/span> <span class=\"k\">rows<\/span><span class=\"o\">=<\/span><span class=\"mi\">3<\/span> <span class=\"n\">loops<\/span><span class=\"o\">=<\/span><span class=\"mi\">3<\/span><span class=\"p\">)<\/span>\r\n                     <span class=\"n\">Sort<\/span> <span class=\"k\">Key<\/span><span class=\"p\">:<\/span> <span class=\"n\">l_returnflag<\/span><span class=\"p\">,<\/span> <span class=\"n\">l_linestatus<\/span>\r\n                     <span class=\"n\">Sort<\/span> <span class=\"k\">Method<\/span><span class=\"p\">:<\/span> <span class=\"n\">quicksort<\/span>  <span class=\"n\">Memory<\/span><span class=\"p\">:<\/span> <span class=\"mi\">27<\/span><span class=\"n\">kB<\/span>\r\n                     <span class=\"n\">Worker<\/span> <span class=\"mi\">0<\/span><span class=\"p\">:<\/span>  <span class=\"n\">Sort<\/span> <span class=\"k\">Method<\/span><span class=\"p\">:<\/span> <span class=\"n\">quicksort<\/span>  <span class=\"n\">Memory<\/span><span class=\"p\">:<\/span> <span class=\"mi\">27<\/span><span class=\"n\">kB<\/span>\r\n                     <span class=\"n\">Worker<\/span> <span class=\"mi\">1<\/span><span class=\"p\">:<\/span>  <span class=\"n\">Sort<\/span> <span class=\"k\">Method<\/span><span class=\"p\">:<\/span> <span class=\"n\">quicksort<\/span>  <span class=\"n\">Memory<\/span><span class=\"p\">:<\/span> <span class=\"mi\">27<\/span><span class=\"n\">kB<\/span>\r\n                     <span class=\"o\">-&gt;<\/span>  <span class=\"k\">Partial<\/span> <span class=\"n\">HashAggregate<\/span>  <span class=\"p\">(<\/span><span class=\"n\">cost<\/span><span class=\"o\">=<\/span><span class=\"mi\">2436688<\/span><span class=\"p\">.<\/span><span class=\"mi\">33<\/span><span class=\"p\">..<\/span><span class=\"mi\">2436688<\/span><span class=\"p\">.<\/span><span class=\"mi\">50<\/span> <span class=\"k\">rows<\/span><span class=\"o\">=<\/span><span class=\"mi\">6<\/span> <span class=\"n\">width<\/span><span class=\"o\">=<\/span><span class=\"mi\">236<\/span><span class=\"p\">)<\/span> <span class=\"p\">(<\/span><span class=\"n\">actual<\/span> <span class=\"nb\">time<\/span><span class=\"o\">=<\/span><span class=\"mi\">68879<\/span><span class=\"p\">.<\/span><span class=\"mi\">633<\/span><span class=\"p\">..<\/span><span class=\"mi\">68879<\/span><span class=\"p\">.<\/span><span class=\"mi\">641<\/span> <span class=\"k\">rows<\/span><span class=\"o\">=<\/span><span class=\"mi\">4<\/span> <span class=\"n\">loops<\/span><span class=\"o\">=<\/span><span class=\"mi\">3<\/span><span class=\"p\">)<\/span>\r\n                           <span class=\"k\">Group<\/span> <span class=\"k\">Key<\/span><span class=\"p\">:<\/span> <span class=\"n\">l_returnflag<\/span><span class=\"p\">,<\/span> <span class=\"n\">l_linestatus<\/span>\r\n                           <span class=\"o\">-&gt;<\/span>  <span class=\"n\">Parallel<\/span> <span class=\"n\">Seq<\/span> <span class=\"n\">Scan<\/span> <span class=\"k\">on<\/span> <span class=\"n\">lineitem<\/span>  <span class=\"p\">(<\/span><span class=\"n\">cost<\/span><span class=\"o\">=<\/span><span class=\"mi\">0<\/span><span class=\"p\">.<\/span><span class=\"mi\">00<\/span><span class=\"p\">..<\/span><span class=\"mi\">1437019<\/span><span class=\"p\">.<\/span><span class=\"mi\">25<\/span> <span class=\"k\">rows<\/span><span class=\"o\">=<\/span><span class=\"mi\">24991727<\/span> <span class=\"n\">width<\/span><span class=\"o\">=<\/span><span class=\"mi\">25<\/span><span class=\"p\">)<\/span> <span class=\"p\">(<\/span><span class=\"n\">actual<\/span> <span class=\"nb\">time<\/span><span class=\"o\">=<\/span><span class=\"mi\">2<\/span><span class=\"p\">.<\/span><span class=\"mi\">905<\/span><span class=\"p\">..<\/span><span class=\"mi\">13461<\/span><span class=\"p\">.<\/span><span class=\"mi\">643<\/span> <span class=\"k\">rows<\/span><span class=\"o\">=<\/span><span class=\"mi\">19995278<\/span> <span class=\"n\">loops<\/span><span class=\"o\">=<\/span><span class=\"mi\">3<\/span><span class=\"p\">)<\/span>\r\n                                 <span class=\"n\">Filter<\/span><span class=\"p\">:<\/span> <span class=\"p\">(<\/span><span class=\"n\">l_shipdate<\/span> <span class=\"o\">&lt;=<\/span> <span class=\"s1\">'1998-11-30 00:00:00'<\/span><span class=\"p\">::<\/span><span class=\"nb\">timestamp<\/span> <span class=\"k\">without<\/span> <span class=\"nb\">time<\/span> <span class=\"k\">zone<\/span><span class=\"p\">)<\/span>\r\n                                 <span class=\"k\">Rows<\/span> <span class=\"n\">Removed<\/span> <span class=\"k\">by<\/span> <span class=\"n\">Filter<\/span><span class=\"p\">:<\/span> <span class=\"mi\">73<\/span>\r\n <span class=\"n\">Planning<\/span> <span class=\"nb\">Time<\/span><span class=\"p\">:<\/span> <span class=\"mi\">0<\/span><span class=\"p\">.<\/span><span class=\"mi\">201<\/span> <span class=\"n\">ms<\/span>\r\n <span class=\"n\">Execution<\/span> <span class=\"nb\">Time<\/span><span class=\"p\">:<\/span> <span class=\"mi\">68885<\/span><span class=\"p\">.<\/span><span class=\"mi\">341<\/span> <span class=\"n\">ms<\/span>\r\n<span class=\"p\">(<\/span><span class=\"mi\">18<\/span> <span class=\"err\">\u884c<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"o\">=#<\/span> <span class=\"k\">SET<\/span> <span class=\"n\">jit<\/span><span class=\"o\">=<\/span><span class=\"k\">on<\/span><span class=\"p\">;<\/span>\r\n<span class=\"o\">=#<\/span> <span class=\"k\">explain<\/span> <span class=\"k\">analyze<\/span>\r\n<span class=\"k\">select<\/span>\r\n  <span class=\"n\">l_returnflag<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"n\">l_linestatus<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"k\">sum<\/span><span class=\"p\">(<\/span><span class=\"n\">l_quantity<\/span><span class=\"p\">)<\/span> <span class=\"k\">as<\/span> <span class=\"n\">sum_qty<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"k\">sum<\/span><span class=\"p\">(<\/span><span class=\"n\">l_extendedprice<\/span><span class=\"p\">)<\/span> <span class=\"k\">as<\/span> <span class=\"n\">sum_base_price<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"k\">sum<\/span><span class=\"p\">(<\/span><span class=\"n\">l_extendedprice<\/span> <span class=\"o\">*<\/span> <span class=\"p\">(<\/span><span class=\"mi\">1<\/span> <span class=\"o\">-<\/span> <span class=\"n\">l_discount<\/span><span class=\"p\">))<\/span> <span class=\"k\">as<\/span> <span class=\"n\">sum_disc_price<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"k\">sum<\/span><span class=\"p\">(<\/span><span class=\"n\">l_extendedprice<\/span> <span class=\"o\">*<\/span> <span class=\"p\">(<\/span><span class=\"mi\">1<\/span> <span class=\"o\">-<\/span> <span class=\"n\">l_discount<\/span><span class=\"p\">)<\/span> <span class=\"o\">*<\/span> <span class=\"p\">(<\/span><span class=\"mi\">1<\/span> <span class=\"o\">+<\/span> <span class=\"n\">l_tax<\/span><span class=\"p\">))<\/span> <span class=\"k\">as<\/span> <span class=\"n\">sum_charge<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"k\">avg<\/span><span class=\"p\">(<\/span><span class=\"n\">l_quantity<\/span><span class=\"p\">)<\/span> <span class=\"k\">as<\/span> <span class=\"n\">avg_qty<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"k\">avg<\/span><span class=\"p\">(<\/span><span class=\"n\">l_extendedprice<\/span><span class=\"p\">)<\/span> <span class=\"k\">as<\/span> <span class=\"n\">avg_price<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"k\">avg<\/span><span class=\"p\">(<\/span><span class=\"n\">l_discount<\/span><span class=\"p\">)<\/span> <span class=\"k\">as<\/span> <span class=\"n\">avg_disc<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"k\">count<\/span><span class=\"p\">(<\/span><span class=\"o\">*<\/span><span class=\"p\">)<\/span> <span class=\"k\">as<\/span> <span class=\"n\">count_order<\/span>\r\n<span class=\"k\">from<\/span>\r\n  <span class=\"n\">lineitem<\/span>\r\n<span class=\"k\">where<\/span>\r\n  <span class=\"n\">l_shipdate<\/span> <span class=\"o\">&lt;=<\/span> <span class=\"nb\">date<\/span> <span class=\"s1\">'1998-12-01'<\/span> <span class=\"o\">-<\/span> <span class=\"n\">interval<\/span> <span class=\"s1\">':1'<\/span> <span class=\"k\">day<\/span>\r\n<span class=\"k\">group<\/span> <span class=\"k\">by<\/span>\r\n  <span class=\"n\">l_returnflag<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"n\">l_linestatus<\/span>\r\n<span class=\"k\">order<\/span> <span class=\"k\">by<\/span>\r\n  <span class=\"n\">l_returnflag<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"n\">l_linestatus<\/span>\r\n<span class=\"k\">LIMIT<\/span> <span class=\"mi\">1<\/span><span class=\"p\">;<\/span>\r\n\r\n                                                                            <span class=\"n\">QUERY<\/span> <span class=\"n\">PLAN<\/span>\r\n<span class=\"c1\">-------------------------------------------------------------------------------------------------------------------------------------------------------------------<\/span>\r\n <span class=\"k\">Limit<\/span>  <span class=\"p\">(<\/span><span class=\"n\">cost<\/span><span class=\"o\">=<\/span><span class=\"mi\">2437688<\/span><span class=\"p\">.<\/span><span class=\"mi\">60<\/span><span class=\"p\">..<\/span><span class=\"mi\">2437688<\/span><span class=\"p\">.<\/span><span class=\"mi\">94<\/span> <span class=\"k\">rows<\/span><span class=\"o\">=<\/span><span class=\"mi\">1<\/span> <span class=\"n\">width<\/span><span class=\"o\">=<\/span><span class=\"mi\">236<\/span><span class=\"p\">)<\/span> <span class=\"p\">(<\/span><span class=\"n\">actual<\/span> <span class=\"nb\">time<\/span><span class=\"o\">=<\/span><span class=\"mi\">55654<\/span><span class=\"p\">.<\/span><span class=\"mi\">800<\/span><span class=\"p\">..<\/span><span class=\"mi\">55658<\/span><span class=\"p\">.<\/span><span class=\"mi\">101<\/span> <span class=\"k\">rows<\/span><span class=\"o\">=<\/span><span class=\"mi\">1<\/span> <span class=\"n\">loops<\/span><span class=\"o\">=<\/span><span class=\"mi\">1<\/span><span class=\"p\">)<\/span>\r\n   <span class=\"o\">-&gt;<\/span>  <span class=\"n\">Finalize<\/span> <span class=\"n\">GroupAggregate<\/span>  <span class=\"p\">(<\/span><span class=\"n\">cost<\/span><span class=\"o\">=<\/span><span class=\"mi\">2437688<\/span><span class=\"p\">.<\/span><span class=\"mi\">60<\/span><span class=\"p\">..<\/span><span class=\"mi\">2437690<\/span><span class=\"p\">.<\/span><span class=\"mi\">67<\/span> <span class=\"k\">rows<\/span><span class=\"o\">=<\/span><span class=\"mi\">6<\/span> <span class=\"n\">width<\/span><span class=\"o\">=<\/span><span class=\"mi\">236<\/span><span class=\"p\">)<\/span> <span class=\"p\">(<\/span><span class=\"n\">actual<\/span> <span class=\"nb\">time<\/span><span class=\"o\">=<\/span><span class=\"mi\">55278<\/span><span class=\"p\">.<\/span><span class=\"mi\">626<\/span><span class=\"p\">..<\/span><span class=\"mi\">55278<\/span><span class=\"p\">.<\/span><span class=\"mi\">627<\/span> <span class=\"k\">rows<\/span><span class=\"o\">=<\/span><span class=\"mi\">1<\/span> <span class=\"n\">loops<\/span><span class=\"o\">=<\/span><span class=\"mi\">1<\/span><span class=\"p\">)<\/span>\r\n         <span class=\"k\">Group<\/span> <span class=\"k\">Key<\/span><span class=\"p\">:<\/span> <span class=\"n\">l_returnflag<\/span><span class=\"p\">,<\/span> <span class=\"n\">l_linestatus<\/span>\r\n         <span class=\"o\">-&gt;<\/span>  <span class=\"n\">Gather<\/span> <span class=\"n\">Merge<\/span>  <span class=\"p\">(<\/span><span class=\"n\">cost<\/span><span class=\"o\">=<\/span><span class=\"mi\">2437688<\/span><span class=\"p\">.<\/span><span class=\"mi\">60<\/span><span class=\"p\">..<\/span><span class=\"mi\">2437690<\/span><span class=\"p\">.<\/span><span class=\"mi\">00<\/span> <span class=\"k\">rows<\/span><span class=\"o\">=<\/span><span class=\"mi\">12<\/span> <span class=\"n\">width<\/span><span class=\"o\">=<\/span><span class=\"mi\">236<\/span><span class=\"p\">)<\/span> <span class=\"p\">(<\/span><span class=\"n\">actual<\/span> <span class=\"nb\">time<\/span><span class=\"o\">=<\/span><span class=\"mi\">55278<\/span><span class=\"p\">.<\/span><span class=\"mi\">556<\/span><span class=\"p\">..<\/span><span class=\"mi\">55281<\/span><span class=\"p\">.<\/span><span class=\"mi\">857<\/span> <span class=\"k\">rows<\/span><span class=\"o\">=<\/span><span class=\"mi\">4<\/span> <span class=\"n\">loops<\/span><span class=\"o\">=<\/span><span class=\"mi\">1<\/span><span class=\"p\">)<\/span>\r\n               <span class=\"n\">Workers<\/span> <span class=\"n\">Planned<\/span><span class=\"p\">:<\/span> <span class=\"mi\">2<\/span>\r\n               <span class=\"n\">Workers<\/span> <span class=\"n\">Launched<\/span><span class=\"p\">:<\/span> <span class=\"mi\">2<\/span>\r\n               <span class=\"o\">-&gt;<\/span>  <span class=\"n\">Sort<\/span>  <span class=\"p\">(<\/span><span class=\"n\">cost<\/span><span class=\"o\">=<\/span><span class=\"mi\">2436688<\/span><span class=\"p\">.<\/span><span class=\"mi\">57<\/span><span class=\"p\">..<\/span><span class=\"mi\">2436688<\/span><span class=\"p\">.<\/span><span class=\"mi\">59<\/span> <span class=\"k\">rows<\/span><span class=\"o\">=<\/span><span class=\"mi\">6<\/span> <span class=\"n\">width<\/span><span class=\"o\">=<\/span><span class=\"mi\">236<\/span><span class=\"p\">)<\/span> <span class=\"p\">(<\/span><span class=\"n\">actual<\/span> <span class=\"nb\">time<\/span><span class=\"o\">=<\/span><span class=\"mi\">55262<\/span><span class=\"p\">.<\/span><span class=\"mi\">481<\/span><span class=\"p\">..<\/span><span class=\"mi\">55262<\/span><span class=\"p\">.<\/span><span class=\"mi\">482<\/span> <span class=\"k\">rows<\/span><span class=\"o\">=<\/span><span class=\"mi\">3<\/span> <span class=\"n\">loops<\/span><span class=\"o\">=<\/span><span class=\"mi\">3<\/span><span class=\"p\">)<\/span>\r\n                     <span class=\"n\">Sort<\/span> <span class=\"k\">Key<\/span><span class=\"p\">:<\/span> <span class=\"n\">l_returnflag<\/span><span class=\"p\">,<\/span> <span class=\"n\">l_linestatus<\/span>\r\n                     <span class=\"n\">Sort<\/span> <span class=\"k\">Method<\/span><span class=\"p\">:<\/span> <span class=\"n\">quicksort<\/span>  <span class=\"n\">Memory<\/span><span class=\"p\">:<\/span> <span class=\"mi\">27<\/span><span class=\"n\">kB<\/span>\r\n                     <span class=\"n\">Worker<\/span> <span class=\"mi\">0<\/span><span class=\"p\">:<\/span>  <span class=\"n\">Sort<\/span> <span class=\"k\">Method<\/span><span class=\"p\">:<\/span> <span class=\"n\">quicksort<\/span>  <span class=\"n\">Memory<\/span><span class=\"p\">:<\/span> <span class=\"mi\">27<\/span><span class=\"n\">kB<\/span>\r\n                     <span class=\"n\">Worker<\/span> <span class=\"mi\">1<\/span><span class=\"p\">:<\/span>  <span class=\"n\">Sort<\/span> <span class=\"k\">Method<\/span><span class=\"p\">:<\/span> <span class=\"n\">quicksort<\/span>  <span class=\"n\">Memory<\/span><span class=\"p\">:<\/span> <span class=\"mi\">27<\/span><span class=\"n\">kB<\/span>\r\n                     <span class=\"o\">-&gt;<\/span>  <span class=\"k\">Partial<\/span> <span class=\"n\">HashAggregate<\/span>  <span class=\"p\">(<\/span><span class=\"n\">cost<\/span><span class=\"o\">=<\/span><span class=\"mi\">2436688<\/span><span class=\"p\">.<\/span><span class=\"mi\">33<\/span><span class=\"p\">..<\/span><span class=\"mi\">2436688<\/span><span class=\"p\">.<\/span><span class=\"mi\">50<\/span> <span class=\"k\">rows<\/span><span class=\"o\">=<\/span><span class=\"mi\">6<\/span> <span class=\"n\">width<\/span><span class=\"o\">=<\/span><span class=\"mi\">236<\/span><span class=\"p\">)<\/span> <span class=\"p\">(<\/span><span class=\"n\">actual<\/span> <span class=\"nb\">time<\/span><span class=\"o\">=<\/span><span class=\"mi\">55262<\/span><span class=\"p\">.<\/span><span class=\"mi\">405<\/span><span class=\"p\">..<\/span><span class=\"mi\">55262<\/span><span class=\"p\">.<\/span><span class=\"mi\">413<\/span> <span class=\"k\">rows<\/span><span class=\"o\">=<\/span><span class=\"mi\">4<\/span> <span class=\"n\">loops<\/span><span class=\"o\">=<\/span><span class=\"mi\">3<\/span><span class=\"p\">)<\/span>\r\n                           <span class=\"k\">Group<\/span> <span class=\"k\">Key<\/span><span class=\"p\">:<\/span> <span class=\"n\">l_returnflag<\/span><span class=\"p\">,<\/span> <span class=\"n\">l_linestatus<\/span>\r\n                           <span class=\"o\">-&gt;<\/span>  <span class=\"n\">Parallel<\/span> <span class=\"n\">Seq<\/span> <span class=\"n\">Scan<\/span> <span class=\"k\">on<\/span> <span class=\"n\">lineitem<\/span>  <span class=\"p\">(<\/span><span class=\"n\">cost<\/span><span class=\"o\">=<\/span><span class=\"mi\">0<\/span><span class=\"p\">.<\/span><span class=\"mi\">00<\/span><span class=\"p\">..<\/span><span class=\"mi\">1437019<\/span><span class=\"p\">.<\/span><span class=\"mi\">25<\/span> <span class=\"k\">rows<\/span><span class=\"o\">=<\/span><span class=\"mi\">24991727<\/span> <span class=\"n\">width<\/span><span class=\"o\">=<\/span><span class=\"mi\">25<\/span><span class=\"p\">)<\/span> <span class=\"p\">(<\/span><span class=\"n\">actual<\/span> <span class=\"nb\">time<\/span><span class=\"o\">=<\/span><span class=\"mi\">343<\/span><span class=\"p\">.<\/span><span class=\"mi\">737<\/span><span class=\"p\">..<\/span><span class=\"mi\">9535<\/span><span class=\"p\">.<\/span><span class=\"mi\">259<\/span> <span class=\"k\">rows<\/span><span class=\"o\">=<\/span><span class=\"mi\">19995278<\/span> <span class=\"n\">loops<\/span><span class=\"o\">=<\/span><span class=\"mi\">3<\/span><span class=\"p\">)<\/span>\r\n                                 <span class=\"n\">Filter<\/span><span class=\"p\">:<\/span> <span class=\"p\">(<\/span><span class=\"n\">l_shipdate<\/span> <span class=\"o\">&lt;=<\/span> <span class=\"s1\">'1998-11-30 00:00:00'<\/span><span class=\"p\">::<\/span><span class=\"nb\">timestamp<\/span> <span class=\"k\">without<\/span> <span class=\"nb\">time<\/span> <span class=\"k\">zone<\/span><span class=\"p\">)<\/span>\r\n                                 <span class=\"k\">Rows<\/span> <span class=\"n\">Removed<\/span> <span class=\"k\">by<\/span> <span class=\"n\">Filter<\/span><span class=\"p\">:<\/span> <span class=\"mi\">73<\/span>\r\n <span class=\"n\">Planning<\/span> <span class=\"nb\">Time<\/span><span class=\"p\">:<\/span> <span class=\"mi\">0<\/span><span class=\"p\">.<\/span><span class=\"mi\">415<\/span> <span class=\"n\">ms<\/span>\r\n <span class=\"n\">JIT<\/span><span class=\"p\">:<\/span>\r\n   <span class=\"n\">Functions<\/span><span class=\"p\">:<\/span> <span class=\"mi\">35<\/span>\r\n   <span class=\"k\">Options<\/span><span class=\"p\">:<\/span> <span class=\"n\">Inlining<\/span> <span class=\"k\">true<\/span><span class=\"p\">,<\/span> <span class=\"n\">Optimization<\/span> <span class=\"k\">true<\/span><span class=\"p\">,<\/span> <span class=\"n\">Expressions<\/span> <span class=\"k\">true<\/span><span class=\"p\">,<\/span> <span class=\"n\">Deforming<\/span> <span class=\"k\">true<\/span>\r\n   <span class=\"n\">Timing<\/span><span class=\"p\">:<\/span> <span class=\"n\">Generation<\/span> <span class=\"mi\">8<\/span><span class=\"p\">.<\/span><span class=\"mi\">490<\/span> <span class=\"n\">ms<\/span><span class=\"p\">,<\/span> <span class=\"n\">Inlining<\/span> <span class=\"mi\">323<\/span><span class=\"p\">.<\/span><span class=\"mi\">187<\/span> <span class=\"n\">ms<\/span><span class=\"p\">,<\/span> <span class=\"n\">Optimization<\/span> <span class=\"mi\">678<\/span><span class=\"p\">.<\/span><span class=\"mi\">813<\/span> <span class=\"n\">ms<\/span><span class=\"p\">,<\/span> <span class=\"n\">Emission<\/span> <span class=\"mi\">392<\/span><span class=\"p\">.<\/span><span class=\"mi\">651<\/span> <span class=\"n\">ms<\/span><span class=\"p\">,<\/span> <span class=\"n\">Total<\/span> <span class=\"mi\">1403<\/span><span class=\"p\">.<\/span><span class=\"mi\">141<\/span> <span class=\"n\">ms<\/span>\r\n <span class=\"n\">Execution<\/span> <span class=\"nb\">Time<\/span><span class=\"p\">:<\/span> <span class=\"mi\">55708<\/span><span class=\"p\">.<\/span><span class=\"mi\">158<\/span> <span class=\"n\">ms<\/span>\r\n<span class=\"p\">(<\/span><span class=\"mi\">22<\/span> <span class=\"err\">\u884c<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<p>\u7ecf\u8fc7JIT\u7f16\u8bd1\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230\u6027\u80fd\u5f97\u5230\u4e86\u6539\u8fdb\u3002(\u867d\u7136\u7531\u4e8e\u73af\u5883\u539f\u56e0\uff0c\u4e0d\u4f1a\u660e\u663e\u53d8\u5feb&#8230;)<br \/>\n\u4e0b\u9762\u662f\u6bcf\u4e2a\u65b9\u6cd5\u6267\u884c5\u6b21\u65f6\u7684\u6bd4\u8f83\u7ed3\u679c\u3002<\/p>\n<div>\n<div class=\"post-table\">\u5b9f\u884c\u6642\u9593(ms)1\u56de\u76ee2\u56de\u76ee3\u56de\u76ee4\u56de\u76ee5\u56de\u76ee\u5e73\u5747JIT\u30b3\u30f3\u30d1\u30a4\u30eb\u306a\u305762161.41263427.40465189.33974441.31562692.63265582.42JIT\u30b3\u30f3\u30d1\u30a4\u30eb\u3042\u308a56242.27857135.67958272.94968390.39557561.05859520.47<\/div>\n<\/div>\n<p>\u901a\u8fc7\u4f7f\u7528JIT\u7f16\u8bd1\uff0c\u53ef\u4ee5\u52a0\u901f\u6267\u884c\u590d\u6742\u8ba1\u7b97\u7684SQL\u67e5\u8be2\uff0c\u5c24\u5176\u662f\u5728\u5177\u5907\u66f4\u5927\u5185\u5b58\u548cCPU\u7684\u73af\u5883\u4e0b\uff0cJIT\u7f16\u8bd1\u7684\u5f71\u54cd\u4f1a\u8fdb\u4e00\u6b65\u589e\u5f3a\u3002<\/p>\n<h1>\u53c2\u8003\u7f51\u7ad9<\/h1>\n<h2>\u5373\u65f6\u7f16\u8bd1\u7684\u8be6\u7ec6\u4fe1\u606f\u548c\u57fa\u51c6\u6d4b\u8bd5<\/h2>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">PGCon 2017 (JIT-Compiling SQL Queries in PostgreSQL Using LLVM)<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">https:\/\/www.pgcon.org\/2017\/schedule\/events\/1092.en.html<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">PGConf 2017\u306b\u304a\u3051\u308bJIT\u30b3\u30f3\u30d1\u30a4\u30eb\u306e\u8b1b\u6f14\u3067\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5f93\u6765\u3068\u306e\u9055\u3044\u3084\u3001JIT\u30b3\u30f3\u30d1\u30a4\u30eb\u306e\u76ee\u7684\u306a\u3069\u8a73\u3057\u3044\u60c5\u5831\u304c\u8f09\u3063\u3066\u3044\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>PostgreSQL 11 and Just In Time Compilation of Queries<br \/>\nhttps:\/\/www.citusdata.com\/blog\/2018\/09\/11\/postgresql-11-just-in-time\/<br \/>\nJIT\u30b3\u30f3\u30d1\u30a4\u30eb\u306b\u3088\u308b\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u30c6\u30b9\u30c8\u306e\u7d50\u679c\u304c\u8f09\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<h2>\u6784\u5efa\u548c\u9a8c\u8bc1\u7cfb\u7edf<\/h2>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">PostgreSQL 11 \u691c\u8a3c\u5831\u544a<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">https:\/\/www.sraoss.co.jp\/tech-blog\/pgsql\/pg11report\/<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">(\u21923.3.1. JIT \u30b3\u30f3\u30d1\u30a4\u30eb\u3092\u4f7f\u3046\u305f\u3081\u306e\u30d3\u30eb\u30c9\u4f7f\u3046\u305f\u3081\u306e\u30d3\u30eb\u30c9\u3046\u305f\u3081\u306e\u30d3\u30eb\u30c9)<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">PostgreSQL 11\u306e\u69d8\u3005\u306a\u691c\u8a3c\u7d50\u679c\u304c\u8f09\u3063\u3066\u3044\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u3068\u308a\u3042\u3048\u305a11\u3067\u4f55\u304b\u3067\u304d\u308b\u306e\u304b\u3001\u3092\u77e5\u308a\u305f\u3044\u65b9\u306b\u30aa\u30b9\u30b9\u30e1\u3067\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>KKIDA-GALAXY [PostgreSQL11\u306eJIT\u30b3\u30f3\u30d1\u30a4\u30ea\u30f3\u30b0\u3092\u8a66\u3059]<br \/>\nhttp:\/\/kkida-galaxy.blogspot.com\/2018\/04\/postgresql11-with-jit-01.html<br \/>\nJIT\u30b3\u30f3\u30d1\u30a4\u30eb\u74b0\u5883\u3092\u69cb\u7bc9\u624b\u9806\u3068\u3057\u3066\u3001\u5b9f\u884c\u30b3\u30de\u30f3\u30c9\u3068\u305d\u306e\u7d50\u679c\u306a\u3069\u8a73\u7d30\u306b\u8aac\u660e\u3055\u308c\u3066\u3044\u307e\u3059\u3002<br \/>\n\u74b0\u5883\u69cb\u7bc9\u304c\u4e0a\u624b\u304f\u3044\u304b\u306a\u3044\u65b9\u306f\u3001\u3053\u3061\u3089\u3092\u3058\u3063\u304f\u308a\u3068\u53c2\u7167\u3059\u308b\u3068\u826f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<p>How to compile PostgreSQL 11 with support for JIT compilation on RHEL\/CentOS 7<br \/>\nhttps:\/\/blog.dbi-services.com\/how-to-compile-postgresql-11-with-support-for-jit-compilation-on-rhelcentos-7\/<br \/>\n\u6d77\u5916\u306e\u30b5\u30a4\u30c8\u3067\u3059\u304c\u3001\u4eca\u56de\u306e\u8a18\u4e8b\u3092\u57f7\u7b46\u3059\u308b\u306b\u8fba\u308a\u3001\u5927\u5909\u53c2\u8003\u306b\u306a\u308a\u307e\u3057\u305f\u3002<br \/>\n\u5c0e\u5165\u624b\u9806\u304b\u3089\u30c6\u30b9\u30c8\u65b9\u6cd5\u307e\u3067\u4e01\u5be7\u306b\u8a18\u8f09\u3055\u308c\u3066\u3044\u307e\u3059\u3002<br \/>\n\u91cd\u8981\u306a\u30b3\u30de\u30f3\u30c9\u3068\u305d\u306e\u7d50\u679c\u306f\u8f09\u3063\u3066\u3044\u308b\u305f\u3081\u3001\u82f1\u8a9e\u304c\u82e6\u624b\u306a\u65b9\u3082Google\u7ffb\u8a33\u3092\u5229\u7528\u3059\u308c\u3070\u7c21\u5358\u306b\u7406\u89e3\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<p>PostgreSQL 11\u306b\u642d\u8f09\u3055\u308c\u308bJIT\u30b3\u30f3\u30d1\u30a4\u30e9\u6a5f\u80fd\u3092\u52d5\u304b\u3057\u3066\u307f\u308b<br \/>\nhttps:\/\/debug-life.net\/entry\/2928<br \/>\n\u69cb\u7bc9\u304b\u3089\u691c\u8a3c\u307e\u3067\u4e01\u5be7\u306b\u8a18\u8f09\u3055\u308c\u3066\u304a\u308a\u3001\u306a\u306b\u3088\u308a\u53c2\u8003\u60c5\u5831\u304c\u8c4a\u5bcc\u3067\u3059\u3002<br \/>\n(\u53c2\u8003\u306b\u3057\u305fPostgreSQL\u306e\u30bd\u30fc\u30b9\u5148\u3082\u7d39\u4ecb\u3055\u308c\u3066\u3044\u307e\u3059)<\/p>\n<h2>\u5728\u4e2d\u56fd\u5f15\u5165TPC-H\u7684PostgreSQL\u3002<\/h2>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">TPC<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">http:\/\/www.tpc.org\/default.asp<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">TPC\u306e\u516c\u5f0f\u30da\u30fc\u30b8\u3067\u3059\u3002TPC-H\u3092\u306f\u3058\u3081\u3068\u3057\u305f\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u30c6\u30b9\u30c8\u306e\u5165\u624b\u3084\u305d\u306e\u8aac\u660e\u6587\u66f8\u304c\u624b\u306b\u5165\u308a\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>PostgreSQL 9.6 with Parallel Query vs. TPC-H<br \/>\nhttp:\/\/rhaas.blogspot.com\/2016\/04\/postgresql-96-with-parallel-query-vs.html<br \/>\nPostgreSQL 9.6\u4e0a\u3067TPC-H\u306e\u5b9f\u65bd\u691c\u8a3c\u304c\u8f09\u3063\u3066\u3044\u307e\u3059\u3002\u30ea\u30f3\u30af\u5148\u306eGit\u306bPostgreSQL\u5411\u3051\u306eTPC-H\u30af\u30a8\u30ea\u3084\u3001PostgreSQL\u3078\u306e\u5c0e\u5165\u65b9\u6cd5\u306a\u3069\u8f09\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>DBGEN\u3092\u4f7f\u3063\u3066\u3001PostgreSQL\u306bTPC-H\u6e2c\u5b9a\u7528\u30c7\u30fc\u30bf\u3092\u683c\u7d0d<br \/>\n<iframe class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" title=\"DBGEN\u3092\u4f7f\u3063\u3066\u3001PostgreSQL\u306bTPC-H\u6e2c\u5b9a\u7528\u30c7\u30fc\u30bf\u3092\u683c\u7d0d - \u3060\u308c\u304b\u306e\u30e1\u30e2\u5e16\" src=\"https:\/\/hatenablog-parts.com\/embed?url=http%3A%2F%2Fsomeone620.hatenablog.com%2Fentry%2F2014%2F10%2F27%2F025535#?secret=nTr5nEsvQg\" data-secret=\"nTr5nEsvQg\" scrolling=\"no\" frameborder=\"0\"><\/iframe><br \/>\nTPC-H\u3092PostgreSQL\u4e0a\u3067\u5b9f\u65bd\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u3001\u65e5\u672c\u8a9e\u3067\u63d0\u4f9b\u3055\u308c\u305f\u60c5\u5831\u3067\u3059\u3002<\/p>\n<p>TPC-H Queries on PostgreSQL<br \/>\nhttp:\/\/myfpgablog.blogspot.com\/2016\/08\/tpc-h-queries-on-postgresql.html<br \/>\nPostgreSQL\u4e0a\u3067TPC-H\u3092\u5b9f\u65bd\u3059\u308b\u305f\u3081\u306e\u624b\u9806\u306b\u3064\u3044\u3066\u8a18\u8f09\u3055\u308c\u3066\u3044\u307e\u3059\u3002PostgreSQL\u5411\u3051\u306b\u5909\u63db\u3057\u305fSQL\u3082\u8f09\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u9996\u5148 2018\u5e7410\u670818\u65e5\uff0cPostgreSQL 11\u53d1\u5e03\u4e86\u3002 PostgreSQL 11 Released [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-42194","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - 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