Re: oracle high cpu

From: FrenKy <>
Date: Fri, 08 Aug 2008 07:53:51 +0200
Message-ID: <g7gn1k$aov$> wrote:
> On Thu, 07 Aug 2008 22:34:59 +0200, FrenKy <> wrote:

>> hi *,
>> oracle 11, solaris 10. 4cpu machine 8GB mem/CPU.
>> Oracle comes up to ~30% cpu from time to time and it stays there with 
>> that CPU usage untill i do init 6.
>> Nothing I can thing of accounts to that usage (no sql queries at time it 
>> goes to 30% cpu)
>> How can I check what accounts to this high cpu usage?

> 30 percent is way too low to pay attention to it. Oracle should run on
> a dedicated server.
> Apart from that the usual Solaris utilities apply, as you can query
> v$sysstat (Statistic descriptions are in v$statname)

"30% is not too much" can be true in some conditions e.g. heavy load on Oracle. But in "idle" mode, 30% activity is way, way, way too much. And I would be OK if this 30% stays on for 10min. But after 6h - come on, something is wrong. Hint to host Oracle on separate machine is also OK, but we do not need it for this DB as the expected load is low (under 15% CPU usage during normal operation) and DB is on a separate disk.

That said, thank you for the v$sysstat hint. I'll take a look. Received on Fri Aug 08 2008 - 00:53:51 CDT

Original text of this message