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Re: Occasional giant spikes in CPU load

From: Greg Smith <greg(at)2ndquadrant(dot)com>
To: Craig James <craig_james(at)emolecules(dot)com>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: Occasional giant spikes in CPU load
Date: 2010-06-25 01:13:39
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-performance
Craig James wrote:
> Now the question has narrowed down to this: what could trigger EVERY 
> postgres backend to do something at the same time?  See the attached 
> output from "top -b", which shows what is happening during one of the 
> CPU spikes.

By the way:  you probably want "top -b -c", which will actually show you 
what each client is doing via inspecting what it's set its command line to.

Greg Smith  2ndQuadrant US  Baltimore, MD
PostgreSQL Training, Services and Support

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