On Tue, Jun 30, 2015 at 6:25 AM, Peter Geoghegan <pg@heroku.com> wrote: > > On Mon, Jun 29, 2015 at 5:37 PM, Jeff Janes <jeff.janes@gmail.com> wrote: > > Is there a way to use gdb to figure out who holds the lock they are waiting > > for? > > Have you considered building with LWLOCK_STATS defined, and LOCK_DEBUG > defined? That might do it. >
If you define LOCK_DEBUG, then you can check owner of the
lock [1], which will tell you about the Exclusive owner of that lock
and can help you in debugging the problem.
[1]
#ifdef LOCK_DEBUG struct PGPROC *owner; /* last exlusive owner of the lock */ #endif } LWLock;
