On 25/02/2013 12:45 AM, Tom Lane wrote:
Odd. I wonder if you are seeing some variant of the old context swap storm problem. The "99.8% system time" reading is suggestive but hardly conclusive. Does top's report of context swap rate go to the moon? It would be interesting to strace a few of the server processes while one of these events is happening, too. regards, tom lane
I used vmstat to look at the context swaps, they were around 5k and 15k interrupts per second. I thought that it was to many interrupts and after a bit of search a website mentioned that the network card driver could cause that. After updating kernel and the driver the stalling is not reproducible any more. Weird enough, when I load test the server now I have 35k interrupts and 250k context switches, but no problems at all. Thanks for pointing me into the right direction. -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
