Re: Postgres 9.2 CPU Usage

On Fri, Dec 20, 2013 at 12:56:47AM +0400, Vasiliy I Ozerov wrote:
> Good day!
>
> Sometimes ago we order new Dell (Dell PowerEdge T720 DX290) server, with this configuration:
>
> 1. 128 Gb DDR3 ECC RAM
> 2. Dual Intel Xeon E5-2620 Hexa Core incl. Hyper-Thrreading Tecknology
> 3. 2x 600Gb SSD With PERC H710 mini RAID 1
>
> ...
>
> But we have a strange cpu usage by postgresql (LA about 4). But there is no a lot of requests or heavy requests. We
usepgbouncer, so postgresql doesn’t accept connections from users, only from pgbouncer. And the number of active
requestsper second is about 5: 
>
> ...
>
> I think it is some misconfiguration issue, so can you help me with some config/sysctl options for such server?
>
> Thank you!
>

Hi Vasiliy,

I think this may not be a PostgreSQL related problem, but a BIOS configuration
problem. Dell used to ship servers with the BIOS set for performance mode, i.e.
100% at all times, now they ship with more energy thrifty defaults. We had a
similar problem and by setting the BIOS to performance mode and rebooting, the
phantom load vanished.

Regards,
Ken