mljv@planwerk6.de writes:
> ok, at the moment i got some traffic and my load is at 1.5. But now with
> logging the timestamp I have seen that the long durations are quite regular
> at intervals of 10 minutes.
Well, that's pretty suggestive. Tell us about your checkpoint and
bgwriter settings. Also, is there any other service running on the
machine that might have activity spikes every 10 minutes?
regards, tom lane