Oracle Execution Plans: Analyze Performance Statistics

1 year ago
Liam
1 minute

In Oracle database, there are several ways to analyze execution plans and performance statistics.

  1. Analyze the execution plan using the SQL statement “explain plan”. You can generate the execution plan for a statement by adding the keyword “explain plan for” before the SQL statement. Then use “select * from table(dbms_xplan.display)” to view the execution plan.
  2. Utilize the AUTOTRACE feature to analyze the execution plan and performance statistics. By adding the “set autotrace on” keyword before the SQL statement and executing it, the system will display the execution plan and performance statistics.
  3. Use SQL Trace to gather information about the execution of SQL statements. The SQL Trace can be enabled by setting parameters, and then use the tkprof tool to analyze the trace file to view the execution plan and performance statistics of SQL statements.
  4. Use Oracle Enterprise Manager or other performance monitoring tools to monitor the execution status of SQL statements in real time and analyze execution plans and performance statistics. These tools can display the execution plans, resource consumption, number of IO operations, and other information of SQL statements, helping users to optimize performance.
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