Karl E. Jorgensen wrote: > Jumping back in (late) in this thread... > Bob Proulx wrote: > > > # free -m > > > total used free shared buffers cached > > > Mem: 7986 7913 73 0 224 6133 > > > -/+ buffers/cache: 1554 6431 > > > Swap: 3813 0 3813 > > > > Shows 8G of ram. Good. Shows no swap used. Also good. (But not > > necessarily bad if some swap is used. So if you see some swap being > > used that isn't necessarily a problem.) > > Mostly good. Yes. But 6133 Mb Cached is not what I would expect - this > indicates that the linux kernel is doing the caching - rather than > MySQL. And the MySQL cache for this stuff is (almost) always more > efficient. But at some point the daemon is going to need to write a file to disk. That data will get cached at that time. Or are you saying that mysql is using or should using O_DIRECT and avoid the cache explicitly? Bob
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