Message-ID: <511C2F10.3080409@agliodbs.com>
Date: Wed, 13 Feb 2013 16:25:52 -0800
From: Josh Berkus <josh@agliodbs.com>
Organization: PostgreSQL Experts Inc.
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To: pgsql-performance@postgresql.org
Subject: Re: High CPU usage / load average after upgrading to Ubuntu
 12.04
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On 02/13/2013 11:24 AM, Josh Berkus wrote:
> On 02/12/2013 05:28 PM, Dan Kogan wrote:
>> Hi Will,
>>
>> Yes, I think we've seen some discussions on that.  Our servers our hosted on Amazon Ec2 and upgrading the kernel does not seem so straight forward.
>> We did a benchmark using pgbench on 3.5 vs 3.2 and saw an improvement.  Unfortunately our production server would not boot off 3.5 so we had to revert back to 3.2.
>>
>> At this point we are contemplating whether it's better to go back to 11.04 or upgrade to 12.10 (which comes with kernel version 3.5).
>> Any thoughts on that would be appreciated.
> 
> I have a machine running the same version of Ubuntu.  I'll run some
> tests and tell you what I find.

So I'm running a pgbench.  However, I don't really have anything to
compare the stats I'm seeing.  CPU usage and load average was high (load
7.9), but that was on -j 8 -c 32, with a TPS of 8500.

What numbers are you seeing, exactly?

-- 
Josh Berkus
PostgreSQL Experts Inc.
http://pgexperts.com


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