Re: Long checkpoint woe

Posted in 2006

Neil Truby — Fri, 31 Mar 2006 16:49:32 +0100 — source: Usenet: comp.databases.informix

"Chafik, Basim" <Basim.Chafik@BancTec.ca> wrote in message news:mailman.222.1143817114.18205.informix-list@iiug.org... > SUN-SOL 5.8: > > # time dd if=/dev/rdsk/c0t8d0s0 of=/csg/test.out bs=2k co> > 10240+0 records in > 10240+0 records out > > real 0m4.90s > user 0m0.06s > sys 0m1.59s > > SUN-SOL 5.10 > > # time dd if=/dev/rdsk/c0t8d0s1 of=/space/test.out bs=2k count=10240 > 10240+0 records in > 10240+0 records out > > real 4.3 > user 0.0 > sys 1.1 It's the write times to raw devices that is the relevant metric, eg: # time dd if=/dev/zero of=/dev/md/rdsk/d122 bs=2k count=10240 10240+0 records in 10240+0 records out real 1m0.27s user 0m0.01s sys 0m0.50s