| From: | Rod Taylor <rbt(at)rbt(dot)ca> |
|---|---|
| To: | Josh Berkus <josh(at)agliodbs(dot)com> |
| Cc: | Pgsql Performance <pgsql-performance(at)postgresql(dot)org> |
| Subject: | Re: Capping CPU usage? |
| Date: | 2002-12-11 18:24:47 |
| Message-ID: | 1039631086.17316.194.camel@jester |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-performance |
On Wed, 2002-12-11 at 13:12, Josh Berkus wrote:
> Folks:
>
> I had a new question from a client: is it possible to "cap" CPU usage
> for PostgreSQL running on Linux? They don't care if the procedure
> degrades Postgres performance, but they can't afford to have Postgres
> take up more than 30% of processor for more than 400 milliseconds
> (they
> are running some real-time operations).
>
> I can't imagine that postmaster could do this, but I thought it there
> might be some kind of Linux Kernel CPU quota option I haven't heard
> of.
> Can anybody point me in the right direction?
Don't know about Linux, but BSD cannot do that. CPU limits are hard --
once you hit it it'll dump the process.
Anyway, would it be sufficient to simply reduce the priority of the
process?
--
Rod Taylor <rbt(at)rbt(dot)ca>
PGP Key: http://www.rbt.ca/rbtpub.asc
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