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Adjust disk cache parameters.

Background

From Tales from responsivenessland: why Linux feels slow, and how to fix that

This adjustment tells Linux to prefer inode/dentry cache to other caches. The parameter that is adjusted is /proc/sys/vm/vfs_cache_pressure.

View current vfs_cache_pressure setting

To view the current vfs_cache_pressure factor run this as root.

cat /proc/sys/vm/vfs_cache_pressure

Change vfs_cache_pressure setting

echo 50 > /proc/sys/vm/vfs_cache_pressure

Change the 50 above to whatever you want between 1 and 100 (100 is the default).

Making the change permanent

This is made permanent by adding "vm.vfs_cache_pressure=50" to "/etc/sysctl.conf"

2007-10-04, T. Sneddon