Joel Stevenson <joelstevenson@xxxxxxx> writes: > I have an existing app that provides a producer / consumer type of > queue and that uses the LISTEN / NOTIFY mechanism to signal the > consumers of new items arriving in the queue. The consumers then > process these items and issue a notify to signal that they have been > processed. In the past issuing these notifications happened very > quickly, now on 8.3 I'm seeing all of them taking over 300ms and many > of them taking 1500ms or more! That's strange, I would not have thought that listen/notify behavior would change at all. How are you measuring this delay exactly? Can you put together a self-contained test case? regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 9: In versions below 8.0, the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match