On Fri, Jan 8, 2010 at 3:07 PM, Greg Smith <greg@2ndquadrant.com> wrote:
> Basically, you have a couple of standard issues here:
>
> 1) You're using RAID-5, which is not known for good write performance. Are
> you sure the disk array performs well on writes? And if you didn't
> benchmark it, you can't be sure.
This can be doubly bad if he's now moved to a set of disks that are
properly obeying fsync but was on disks that were lying about it
before.