Bruce Momjian wrote:
I have been poking around with our fsync default options to see if I can improve them. One issue is that we never default to O_SYNC, but default to O_DSYNC if it exists, which seems strange.
What I did was to beef up my test program and get it into CVS for folks to run. What I found was that different operating systems have different optimal defaults. On BSD/OS and FreeBSD, fdatasync/fsync was better, but on Linux, O_DSYNC/O_SYNC was faster.
[snip]
Linux 2.4.9:
This is a pretty old kernel (I am writing from a machine running 2.4.22)
Maybe before we do this for Linux testing on a more modern kernel might be wise.
cheers
andrew
---------------------------(end of broadcast)--------------------------- TIP 5: Have you checked our extensive FAQ?
http://www.postgresql.org/docs/faqs/FAQ.html
