On Thu, Mar 18, 2004 at 02:22:10PM -0500, Bruce Momjian wrote: > > OK, what better test do you suggest? Right now, there has been no > testing of these.
I suggest you start by doing atleast preallocating a 16 MB file and do the tests on that, to atleast be somewhat simular to what WAL does. I have no idea what the access pattern is for normal WAL operations or how many times it gets synched. Does it only do f(data)sync() at commit time, or for every block it writes? I think if you write more data you'll see more differences between O_(D)SYNC and f(data)sync(). I guess it can depend on if you have lots of small transactions, or more big ones. Atleast try to make something that covers different access patterns. Kurt ---------------------------(end of broadcast)--------------------------- TIP 8: explain analyze is your friend
