On 27/06/14 21:19, Andres Freund wrote:
On 2014-06-27 14:28:20 +1200, Mark Kirkwood wrote:
My feeling is spinlock or similar, 'perf top' shows
kernel find_busiest_group
kernel _raw_spin_lock
as the top time users.
Those don't tell that much by themselves, could you do a hierarchical
profile? I.e. perf record -ga? That'll at least give the callers for
kernel level stuff. For more information compile postgres with
-fno-omit-frame-pointer.
Excellent suggestion, will do next week!
regards
Mark
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