Greg Whalin wrote:
> What drives are you using? For SCSI RAID, you definitly want deadline
> scheduler. That said, even after the switch to deadline, we saw our
> Opteron's running way slow (compared to older slower Xeons). Whatever
> the problem is, we fought it for quite a while (though difficult to
> test too much w/ production dbs) and ended up rolling back to 2.4.
Ug.. I don't want to roll back to 2.4... 2.6 has so many nice features
we depend on. We're using SCSI RAID5 on XEON of course.
I think its time to rule out some things. I'm going to migrate to
RAID1... just to verify... then try reviewing our kernel options.. maybe
disabling NPTL... maybe try another filesystem...
For the record... no a loaded system what type of IO do you guys see?
Anywhere near full disk capacity? I'm curious to see what type of IO
people are seeing on a production/loaded mysql box.
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