| From: | Mark Wong <markwkm(at)gmail(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com>, Greg Smith <gsmith(at)gregsmith(dot)com>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: 8.3 / 8.2.6 restore comparison |
| Date: | 2008-02-08 01:41:48 |
| Message-ID: | 20080207174148.3e08b9cf.markwkm@gmail.com |
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| Lists: | pgsql-hackers |
On Thu, 07 Feb 2008 13:47:22 -0500
Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> "Joshua D. Drake" <jd(at)commandprompt(dot)com> writes:
> > I know Luke has mentioned some issues in the past as well around CPU
> > boundness with an upper limit of 300M/s (IIRC) but even that doesn't
> > equate to what is going on here as we are not getting anywhere near
> > that.
>
> Some vmstat and oprofile investigation seems called for. Right now
> we're just guessing about what the bottleneck is.
I also recommend looking into partition alignment on the disks. At
least to quantify how much the storage subsystem suffers from
mis-aligned partitions. It could be that it doesn't.
Regards,
Mark
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