On 4 October 2017 at 00:21, milist ujang <ujang.mil...@gmail.com> wrote: > On Tue, Oct 3, 2017 at 8:49 PM, Craig Ringer <cr...@2ndquadrant.com> wrote: >> >> >> Can you get stacks please? >> >> Use -g > > > # Events: 2K cpu-clock > # > # Overhead Command Shared Object Symbol > # ........ ........ ................. ............................ > # > 86.96% postgres [kernel.kallsyms] [k] __mutex_lock_common.isra.5 > | > --- __mutex_lock_common.isra.5 > read
Unfortunately it looks like you're using a postgres built with -fomit-frame-pointers (the default) on x64, with an older perf not built with libunwind. This produces useless stacks. You may need to recompile with -fno-omit-frame-pointer -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
