On Wed, 2011-08-03 at 10:17 -0400, Tom Lane wrote: > Michael Graham <mgra...@bloxx.com> writes: > > Would my applications > > constant polling of the queue mean that the lock could not be easily > > obtained? > > Very possible, depending on what duty cycle is involved there.
Hmm. The clients aren't that aggressive, especially when they failed to find data on a previous select, there are 4 clients, they each poll every 10 seconds and the select runs in <1ms. It might be worth noting that they don't ever disconnect from the server, but I assume that is not an issue for getting the AccessExclusiveLock on the table? My worry at the moment is that because the table is so large the vacuum takes a very long time to run (one has been running for 5hrs) and I assume it will continue to run until it is able to get the AccessExclusiveLock is so desperately wants. Cheers, -- Michael Graham <mgra...@bloxx.com> -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
