Dennis Brouwer <dennis(dot)brouwer(at)m4n(dot)nl> writes:
> I now have excluded ntp as root cause for the CPU cycles being wasted in
> user space.
Good, cause that wasn't making any sense at all.
> I installed perf and monitored two servers (with different postgresql
> versions and hardware specification) which are "hanging" and have some
> output. Since I'm no die-hard at interpreting the output of perf top what
> would be the next step to do?
I'd suggest asking for help in pgsql-performance. I don't know much
about perf either (still an oprofile guy), but the people who do know
it hang out there.
regards, tom lane