| From: | Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com> |
|---|---|
| To: | "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com> |
| Cc: | "pgsql-general(at)postgresql(dot)org" <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: PSA: If you are running Precise/12.04 upgrade your kernel. |
| Date: | 2013-06-06 22:48:20 |
| Message-ID: | CAOR=d=3_MgL3dw56WwapsX5Qeg_XJm-XKNc_ojQ73Ej-7qMkQQ@mail.gmail.com |
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| Lists: | pgsql-general |
On Thu, Jun 6, 2013 at 4:35 PM, Joshua D. Drake <jd(at)commandprompt(dot)com> wrote:
>
> Hello,
>
> I had the distinct displeasure of staying up entirely too late with a
> customer this week because they upgraded to 12.04 and immediately
> experienced a huge performance regression. In the process they also upgraded
> to PostgreSQL 9.1 from 8.4. There were a lot of knobs to change/fix/modify
> because of this. However, nothing I did fixed the problem. Until... I
> upgraded the kernel.
>
> Upgrading from 3.2Precise to the 3.9.4 kernel produced the following
> results:
I've since heard that 3.4 also fixes this issue as well.
What are you using for your IO on these boxes?
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