ext3 file system performance tuning: what metrics to monitor
Solution 1:
Some suggestions
- Look at the read queue size, if your application is highly random, then tweak the readahead in
/sys/block/<dev>/queue/read_ahead_kbto ensure you're reading data you need, not data the OS thinks you need. - Switch to the deadline scheduler if you haven't already
- use the
noatimemount option unless you're hosting a mail spool - mount with
data=writebackif you've got good backups - keep an eye on your directory sizes, sure hashed directory inodes help, but if you can hash the data yourself then you'll get more consistent results