RE: Long checkpoint woe

Posted in 2006

Chafik, Basim — Tue, 28 Mar 2006 16:09:25 -0500 — source: Usenet: comp.databases.informix

If you are using Solaris 5.8. There is a bug that caused IO performance issue. the problem does not exist on Solaris 9 or 10 Basim Chafik Senior Systems Analyst IBM Certified Advanced Technical Expert (CATE) 1.800.688.4895 basim.chafik@plx.com plexus (Division of BancTec) -----Original Message----- From: Neil Truby [mailto:neil.truby@ardenta.com] Sent: Tuesday, March 28, 2006 4:03 PM To: informix-list@iiug.org Subject: Re: Long checkpoint woe "Roy Mercer" <roy.mercer@gmail.com> wrote in message news:1143575685.269708.17040@v46g2000cwv.googlegroups.com... > Use /dev/null for if and then for of. > This will tell you if it is a read issue or write issue. > If they are the same then it is a real problem with the disks. # time dd if=/dev/md/rdsk/d121 of=/dev/null bs=2k 10240+0 records in 10240+0 records out real 0m14.24s user 0m0.01s sys 0m0.36s # time dd of=/dev/md/rdsk/d121 if=/dev/null bs=2k 0+0 records in 0+0 records out real 0m0.02s user 0m0.00s sys 0m0.01s > Post more information about the storage array. It's a Sun StorEdge 3310 in JBOD format. I don;t think it is a hardware problem (as I keep telling IBM too) because it's the same result on two servers/arrays 300 miles apart. _______________________________________________ Informix-list mailing list Informix-list@iiug.org http://www.iiug.org/mailman/listinfo/informix-list