Modifying Cache Parameters

Modify some cache parameter settings at the operating system layer to improve server performance.

Modify the parameters based on Table 1.

**Table 1** Cache parameters
Linux Parameter	Description	Operation
swappiness	Policy of using the swap partition and memory. A larger value indicates more active use of the swap partition, and a smaller value indicates more active use of the memory.	Open the file. vim /etc/sysctl.conf Press i to enter the insert mode and add the following content to the end of the file: vm.swappiness = 1 Press Esc, type :wq!, and press Enter to save the file and exit. Make the modification take effect. sysctl -p
dirty_ratio	Percentage of dirty data allowed in the memory	Setting dirty_ratio to 5. This enables the system to write dirty pages back to drives more quickly. echo 5 > /proc/sys/vm/dirty_ratio

Parent topic: OS Tuning