Re: High SYS CPU - need advise

[Vlad <marchenko@xxxxxxxxx>]

it's session mode and the pool size is 1200 (cause I need to grantee that in the worst case we have enough slots for all possible clients), however even at the times preceding  high-cpu-sys-stall, the number postmasters are like 15-20. When stall happens, it starts to raise but that's the result of DB not answering in timely manner.

as far as data - yes, I can probably clean up names and provide some data with same queries, though  - we are not able to cause a stall just with those queries &  pgbench; we are able to make the situation worse and stall much likely when it's overlapped with regular queries coming from our app. 

-- Vlad

On Wed, Nov 21, 2012 at 10:45 AM, Merlin Moncure <mmoncure@xxxxxxxxx> wrote:

On Wed, Nov 21, 2012 at 10:43 AM, Jeff Janes <jeff.janes@xxxxxxxxx> wrote:
> On Wed, Nov 21, 2012 at 7:29 AM, Vlad Marchenko <marchenko@xxxxxxxxx> wrote:
>
>> update on my problem: despite pgbouncer, the problem still occures on my
>> end.
>
> As Merlin asked, how big is the pool?  Maybe you are using a large
> enough pool so as to defeat the purpose of restricting the number of
> connections.

also, what mode.

merlin