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
