On Wednesday 20 January 2010 11:33:05 Simon Riggs wrote: > On Wed, 2010-01-20 at 11:04 +0100, Andres Freund wrote: > > On Wednesday 20 January 2010 10:52:24 Simon Riggs wrote: > > > On Wed, 2010-01-20 at 10:45 +0100, Andres Freund wrote: > > > > LWLockAcquire > > > > > > I'm using spinlocks, not lwlocks. > > > > CancelDBBackends which is used in SendRecoveryConflictWithBufferPin which > > in turn used by CheckStandbyTimeout triggered by SIGALRM acquires the > > lwlock. > > Those are used in similar ways to deadlock detection. But only if ImmediateInterruptOK && InterruptHoldoffCount == 0 && CritSectionCount == 0 - which is not the case with HoldingBufferPinThatDelaysRecovery.
Andres -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
