Horton

Re: profiling connection overhead

Andres Freund <andres@anarazel.de>

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From: Andres Freund <andres@anarazel.de>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Robert Haas <robertmhaas@gmail.com>, pgsql-hackers@postgresql.org, Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>
Date: 2010-11-24T22:15:13Z
Lists: pgsql-hackers 
On Wednesday 24 November 2010 23:03:48 Tom Lane wrote:
> Robert Haas <robertmhaas@gmail.com> writes:
> > On Wed, Nov 24, 2010 at 4:05 PM, Tom Lane <tgl@sss.pgh.pa.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