Re: Capping CPU usage? - Mailing list pgsql-performance

From Josh Berkus
Subject Re: Capping CPU usage?
Date
Msg-id web-2278796@davinci.ethosmedia.com
Whole thread Raw
In response to Re: Capping CPU usage?  (Tom Lane <tgl@sss.pgh.pa.us>)
Responses Re: Capping CPU usage?  (Ron Johnson <ron.l.johnson@cox.net>)
List pgsql-performance
Tom,

> If the issue is to prevent Postgres *as a whole* from hogging CPU
> usage,
> I would think that nice-ing the postmaster at launch would work
> beautifully.  Requests like "I want Postgres to use no more than 30%
> of CPU" make no sense to me: if the CPU is otherwise idle, why should
> you insist on reserving 70% of it for the idle loop?

<grin>  That's what I asked the person who asked me.  Apparently, they
want to do real-time operations without forking out for a real-time OS.
  My response was "you can nice the postmaster, and simplify your
queries, but that's about it".

Thank you, everybody, for confirming this.

-Josh Berkus

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