How to clear the cache on a Linux server?

You can clear the cache on a Linux server using the following methods:

1. Clearing PageCache: PageCache is a caching mechanism used by the operating system to cache file system data. You can clear the PageCache by executing the following command:

sync; echo 1 > /proc/sys/vm/drop_caches

1. Cleaning dentries and inodes: Dentries and inodes are mechanisms used to cache file system data. To clean them, you can use the following command:

sync; echo 2 > /proc/sys/vm/drop_caches

1. Clearing all cache: If you want to clear all cache at once, you can execute the following command.

sync; echo 3 > /proc/sys/vm/drop_caches

It is important to be cautious when using the above commands in a production environment, as clearing the cache may lead to a decrease in system performance. It is recommended to perform cache cleaning operations during off-peak hours.