Re: Server stalls, all CPU 100% system time - Mailing list pgsql-performance

From Scott Marlowe
Subject Re: Server stalls, all CPU 100% system time
Date
Msg-id CAOR=d=1g1nsbrPNq_apz+-Su8p=KMvk74oOMejyHFMuNNQScKg@mail.gmail.com
Whole thread Raw
In response to Server stalls, all CPU 100% system time  (Andre <pg@darix.de>)
List pgsql-performance
On Sun, Feb 24, 2013 at 7:08 AM, Andre <pg@darix.de> wrote:
> Hi,
> Since our upgrade of hardware, OS and Postgres we experience server stalls
> under certain conditions, during that time (up to 2 minutes) all CPUs show
> 100% system time. All Postgres processes show BIND in top.
> Usually the server only has a load of  < 0.5 (12 cores) with up to 30
> connections, 200-400 tps
>
> Here is top -H during the stall:
> Threads: 279 total,  25 running, 254 sleeping,   0 stopped,   0 zombie
> %Cpu(s):  0.2 us, 99.8 sy,  0.0 ni,  0.0 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0
> st

It might be useful to see a page of top output as well.  Further turn
on sysstat data collection so you do some post mortem work.


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