On Thu, 2007-07-05 at 21:50 +0100, Heikki Linnakangas wrote: > All test runs were also patched to count the # of buffer allocations, > and # of buffer flushes performed by bgwriter and backends. Here's those > results (I hope the intendation gets through properly): > > imola-336 imola-337 imola-340 > writes by checkpoint 38302 30410 39529 > writes by bgwriter 350113 2205782 1418672 > writes by backends 1834333 265755 787633 > writes total 2222748 2501947 2245834 > allocations 2683170 2657896 2699974
These results may show that the minimum bgwriter_delay of 10ms may be too large for the workloads: whatever the strategy used the bgwriter spends too much time sleeping when it should be working. -- Simon Riggs EnterpriseDB http://www.enterprisedb.com ---------------------------(end of broadcast)--------------------------- TIP 4: Have you searched our list archives? http://archives.postgresql.org
