Linux /dev/vx/dsk/sundg/u01vol on /u01 type vxfs (rw,delaylog,largefiles,ioerror=mwdisable)
-Andrey -----Original Message----- From: Myers, Mike [mailto:[EMAIL PROTECTED] Sent: Tuesday, October 09, 2007 12:33 PM To: Andrey Dmitriev; [email protected] Subject: RE: [Veritas-vx] io issues with EMC CX500 + vxfs_thread You didn't say what OS (which might be important -- AIX?) but I'd look closely at the mount options passed for these file systems. Your response times look good which would generally indicate the storage probably isn't a problem (could I qualify that more? :) Cheers, - Mike.Myers <at> nwdc.net > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf > Of Andrey Dmitriev > Sent: Tuesday, October 09, 2007 9:11 AM > To: [email protected] > Subject: [Veritas-vx] io issues with EMC CX500 + vxfs_thread > > We are seeing what seems to be IO issues with one of the file systems. > Oracle with ODM is running on top of it. > > > avg-cpu: %user %nice %sys %iowait %idle > 26.42 0.00 15.67 0.00 57.92 > > Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s rkB/s > wkB/s avgrq-sz avgqu-sz await svctm %util > sdb 0.00 0.00 923.75 59.53 7392.64 541.81 > 3696.32 270.90 8.07 3.06 3.12 1.02 99.93 > > Notice, combined read/write is under 10megs per second. > > Another system with an identically configured LUN (16disk RAID 10) > > avg-cpu: %user %nice %sys %iowait %idle > 24.10 0.00 6.01 0.25 69.64 > > Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s > rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util > sdd 0.00 0.00 316.05 62.54 187429.10 948.49 > 93714.55 474.25 497.57 1.41 3.72 1.90 71.9 > sdd 0.00 0.00 1330.23 300.33 118990.03 2931.89 > 59495.02 1465.95 74.77 4.05 2.49 0.59 95.45 > > I also see vxfs_thread rising to the top whenever there is high load > (which seems to be related to io) > > I looked at Storage Processors, and they're about 10-20% utilized. Any > clue? > > -andrey > > > _______________________________________________ > Veritas-vx maillist - [email protected] > http://mailman.eng.auburn.edu/mailman/listinfo/veritas-vx > _______________________________________________ Veritas-vx maillist - [email protected] http://mailman.eng.auburn.edu/mailman/listinfo/veritas-vx
