| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, pgsql-hackers(at)postgresql(dot)org, Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com> |
| Subject: | Re: profiling connection overhead |
| Date: | 2010-11-24 22:15:13 |
| Message-ID: | 201011242315.14297.andres@anarazel.de |
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| Lists: | pgsql-hackers |
On Wednesday 24 November 2010 23:03:48 Tom Lane wrote:
> Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> > On Wed, Nov 24, 2010 at 4:05 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> >> (You might be able to confirm or disprove this theory if you ask
> >> oprofile to count memory access stalls instead of CPU clock cycles...)
> >
> > I don't see an event for that.
>
> You probably want something involving cache misses. The event names
> vary depending on just which CPU you've got.
Or some BUS OUTSTANDING event.
Andres
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