From: | Reydan Cankur <reydan(dot)cankur(at)gmail(dot)com> |
---|---|
To: | pgsql-performance(at)postgresql(dot)org |
Subject: | Using OProfile |
Date: | 2009-09-29 11:07:44 |
Message-ID: | 1C850F4F-1AB2-4713-A378-6DF2255C5EE7@gmail.com |
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Thread: | |
Lists: | pgsql-performance |
Hi,
I tried to profile postgresql queries with OProfile but I could not do.
OProfile version: 0.9.5
PostgreSQL version: 8.4.0
OS: CentOS 5
I compiled OProfile with "./configure --with-kernel-support", "make"
and "make install"; also I created a user and a group both named as
"oprofile". User oprofile's default group is oprofile.
PostgreSQL was installed, and there is a db named "test". I ran below
commands with "reydan" user;
sudo opcontrol --init
sudo opcontrol --setup --no-vmlinux
mkdir opdeneme (for profile files)
sudo opcontrol --session-dir=/path/to/opdeneme
sudo opcontrol --start
sudo opcontrol --reset
psql -f deneme.sql test
sudo opcontrol --dump
sudo opcontrol --shutdown
opreport --long-filenames | more (after this command I get below error)
error: no sample files found: profile specification too strict ?
And I could not profile with oprofile, what is my fault, please advice..
content of deneme.sql:
"create table deneme1 as
select sid,
md5((sid*10)::text),
((substring(random()::text from 3 for 5))::int+10000) as a
from generate_series(1,1000000) sid;"
Regards,
--Reydan
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