Re: Huge iowait during checkpoint finish - Mailing list pgsql-general

From Anton Belyaev
Subject Re: Huge iowait during checkpoint finish
Date
Msg-id d7e834b1001110253x2c8732e7i419b8166c36c3b1e@mail.gmail.com
Whole thread Raw
In response to Re: Huge iowait during checkpoint finish  (Scott Marlowe <scott.marlowe@gmail.com>)
Responses Re: Huge iowait during checkpoint finish  (Scott Marlowe <scott.marlowe@gmail.com>)
List pgsql-general
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.

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