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. Greetings, Andres Freund -- Andres Freund http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services
