Re: Out of control query

On Fri, 2008-12-19 at 16:20 -0600, Jason Long wrote:
> I have an inventory system based on PostgreSQL 8.3.5, JBoss,
> Hibernate......
>
> I have a query builder that lets users filter data in a fairly complex
> way.
>
> For some reason the search gets out of control and consumes all CPU.
>
> I set my statement timeout to 2 minutes and this keeps the system from
> going down totally, but this is happening much more frequently than it
> used to.
>
> I can find the problem with the individual query easily enough, but I
> would like a more general solution.
>
> What seems strange to me is that one one core of my Quad core x5472 is
> 100%.  The others show minimal usage.
>
> I would think that other users would get a different core and one
> query could not deadlock the whole system for everyone.
>
> Do you think this is due to my Postgres or JBoss AS configuration for
> database connections?
>
> Any advice will be greatly appreciated.

An explain analyze of the query would be useful.

Joshua D. Drake


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