Andre <pg(at)darix(dot)de> writes:
> 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.
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