Michael Graham <mgraham@xxxxxxxxx> writes: > On Wed, 2011-08-03 at 10:17 -0400, Tom Lane wrote: > >> Michael Graham <mgraham@xxxxxxxxx> 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? You are certain that those clients do these quick select as auto-commit? What does select current_query from pg_stat_activity say? -- Jerry Sievers Postgres DBA/Development Consulting e: postgres.consulting@xxxxxxxxxxx p: 305.321.1144 -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
