On Mon, Aug 27, 2007 at 09:12:17AM -0700, Jeff Amiel wrote: > Tracking for last few days. > Does not appear to happen when little or no user > activity (like Saturday) I don't know if that rules > out autovacuum or not (if no update threshholds are > reached, no vacuuming will take place anyway) I don't think I've seen it so far this thread, but what are your memory overcommit settings and allocated swap? At least on Linux you would need a significant chunk of swap to be able to work with that much memory, even with overcommit off. Check the rules for your system. Another thing I havn't seen mentioned: you appear to be on a 32-bit architecture and with 2GB shared_buffers you've lost half your address space on that alone. Perhaps you simply don't have enough contiguous address space to alloc 512MB. Hope this helps, -- Martijn van Oosterhout <kleptog@xxxxxxxxx> http://svana.org/kleptog/ > From each according to his ability. To each according to his ability to litigate.
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