On Thu, Jun 6, 2013 at 4:35 PM, Joshua D. Drake <jd@commandprompt.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?