Re: COPY speedup

From: Pierre Frédéric Caillaud <lists(at)peufeu(dot)com>
To: "Alvaro Herrera" <alvherre(at)commandprompt(dot)com>
Cc: "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: COPY speedup
Date: 2009-08-18 01:27:20
Message-ID: op.uyt3nulmcke6l8@soyouz
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I'm doing some more exploration with oprofile...

I've got the glibc-debug package installed (on kubuntu), but oprofile
doesn't seem to know about it. I wonder what part of glibc gets 60% of the
run time... do I have to set a magic option in the postgres config ?

samples % image name app name symbol
name
155312 61.7420 libc-2.7.so libc-2.7.so
/lib/tls/i686/cmov/libc-2.7.so
35921 14.2799 postgres postgres
CopyOneRowTo
7485 2.9756 postgres postgres
CopySendData
5626 2.2365 postgres postgres
MemoryContextAlloc
5174 2.0568 postgres postgres
FunctionCall1
5167 2.0541 no-vmlinux no-vmlinux
/no-vmlinux
5087 2.0223 postgres postgres
AllocSetAlloc
4340 1.7253 postgres postgres int4out
3896 1.5488 postgres postgres
heap_deform_tuple

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