Em Mon, 21 Jan 2008 15:45:54 -0800 Jeff Davis <pgsql@xxxxxxxxxxx> escreveu: > On Mon, 2008-01-21 at 18:31 -0500, Greg Smith wrote: > > pgbench doesn't handle 100 clients at once very well on the same > > box as the server, unless you have a pretty serious system. The > > pgbench program itself has a single process model that doesn't > > handle the CFQ round-robin very well at all. On top of that, the > > database scale should be bigger > > He was referring to the CFQ I/O scheduler. I don't think that will > affect pgbench itself, because it doesn't read/write to disk, right? > No. But pgbench local running, it will be concurrency with PostgreSQL. I'm realized some test and really confirm disable *synchronous_commit* performance degrade with CFQ and Deadline. Kind Regards, -- Fernando Ike http://www.midstorm.org/~fike/weblog ---------------------------(end of broadcast)--------------------------- TIP 4: Have you searched our list archives? http://archives.postgresql.org
