Re: Huge iowait during checkpoint finish

2010/1/9 Scott Marlowe <scott.marlowe@gmail.com>:
> 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.
>

Scott, thanks for the interesting suggestion.

And how do I check this?
Old RAID-1 has "hardware" LSI controller.
I still have access to old server.