Ok, I finally got a couple of tests done against CVS from Aug 3, 2005. I'm not sure if I'm showing anything insightful though. I've learned that fdatasync and O_DSYNC are simply fsync and O_SYNC respectively on Linux, which you guys may have already known. There appears to be a fair performance decrease in using open_sync. Just to double check, am I correct in understanding only open_sync uses O_DIRECT?
fdatasync http://www.testing.osdl.org/projects/dbt2dev/results/dev4-015/38/ 5462 notpm open_sync http://www.testing.osdl.org/projects/dbt2dev/results/dev4-015/40/ 4860 notpm Mark ---------------------------(end of broadcast)--------------------------- TIP 4: Have you searched our list archives? http://archives.postgresql.org
