drive performance

[Alex Dean]

On Oct 1, 2010, at 3:32 AM, der.hans wrote:

> Am 30. Sep, 2010 schwätzte Eric Shubert so:
> 
>> Which elevator is being used?
>> (cat /sys/block/sda/queue/scheduler)
> 
> noop anticipatory deadline [cfq]
> 
>> Using async i/o? Synchronous writes are very slow.
> 
> Hmm, not familiar with libaio. Looks like we have it installed.
> 
>> I presume ext3, since you referred to noatime. If you have directories with many files (e.g. Maildir), dir_index option can help.
> 
> Yeah, ext3. Mostly it's a few DB files and some log files. No mail
> directories.

FWIW: A few years ago, I recall seeing somewhat-improved benchmark performance from MySQL after switching to the deadline scheduler.