On Tue, Nov 30, 2004 at 11:03:03AM -0500, Rod Taylor wrote: > On Mon, 2004-11-29 at 16:01 -0800, Mark Wong wrote: > > I have some initial results using 8.0beta5 with our OLTP workload. > > Off the bat I see about a 23% improvement in overall throughput. The > > most significant thing I've noticed was in the oprofile report where > > FunctionCall2 and hash_seq_search have moved down the profile a bit. > > > > Also, I have libc with symbols now so we can see what it's doing with > > in the oprofile output. > > > > 8.0beta5 results: > > http://www.osdl.org/projects/dbt2dev/results/dev4-010/199/ > > throughput: 4076.97 > > > > 8.0beta4 results: > > http://www.osdl.org/projects/dbt2dev/results/dev4-010/191/ > > throughput: 3323.07 > > It appears that WAL archiving (archive_command) is configured in 191 and > disabled (unset) in 199. Perhaps this accounts for some of the > difference? >
I've found the archiving to be about a 1% overhead and in all my random testing since then I haven't seen evidence otherwise. Here's a linke to that message: http://archives.postgresql.org/pgsql-hackers/2004-09/msg00430.php But I'll try again too as things may have changed. Mark ---------------------------(end of broadcast)--------------------------- TIP 8: explain analyze is your friend