| From: | Gerhard Heift <ml-postgresql-20081012-3518(at)gheift(dot)de> |
|---|---|
| To: | pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: profiling connection overhead |
| Date: | 2010-11-24 18:47:13 |
| Message-ID: | 20101124184713.GA1698@gheift |
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| Lists: | pgsql-hackers |
On Wed, Nov 24, 2010 at 01:20:36PM -0500, Robert Haas wrote:
> On Wed, Nov 24, 2010 at 1:06 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> > Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> >> OK, patch attached.
> >
> > Two comments:
>
> Revised patch attached.
>
> I tried configuring oprofile with --callgraph=10 and then running
> oprofile with -c, but it gives kooky looking output I can't interpret.
> For example:
>
> 6 42.8571 postgres record_in
> 8 57.1429 postgres pg_perm_setlocale
> 17035 5.7219 libc-2.11.2.so memcpy
> 17035 100.000 libc-2.11.2.so memcpy [self]
>
> Not that helpful. :-(
Have a look at the wiki:
http://wiki.postgresql.org/wiki/Profiling_with_OProfile#Additional_analysis
> Robert Haas
Regards,
Gerhard Heift
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