Modifying Cache Parameters

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

Modify the parameters based on the following table.

**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.	Run the vim /etc/sysctl.conf command. Press i to enter the insert mode. Add vm.swappiness = 1 to the bottom of the file. Press Esc, type :wq!, and press Enter to save the file and exit. Run the sysctl -p command to make the settings take effect.
dirty_ratio	Percentage of dirty data allowed in the memory	echo 5 > /proc/sys/vm/dirty_ratio

Parent topic: OS Tuning