Steven, > We saw the same performance problems when this new hardware was running > cent 6.3 with a 2.6.32-279.19.1.el6.x86_64 kernel and when it was matched > to the OS/kernel of the old hardware which was cent 5.8 with > a 2.6.18-308.11.1.el5 kernel. Oh, now that's interesting. We've been seeing the same issue (IO stalls on COMMIT) ond had attributed it to some bugs in the 3.2 and 3.4 kernels, partly because we don't have a credible "old server" to test against. Now you have me wondering if there's not a hardware or driver issue with a major HW manufacturer which just happens to be hitting around now. Can you detail your hardware stack so that we can compare notes? -- Josh Berkus PostgreSQL Experts Inc. http://pgexperts.com -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
