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pajamasmarie
19 Posts
0
804
November 26th, 2013 17:00
zero page reclaim causes high DA utilization?
Folks, I recently began reclaim on all SG's within a VMAX 20K and shortly thereafter (maybe a couple hours) SMAS began alerting us that DA's at 90% utilization. I have been trying to trace it down to a particularly heavy hitting SG but then realized this could be CPU utilization on the DA. Incidentally, when I examine Port Utilization on the same DA's, both ports 0,1 are about 20% utilized. The method I used is below. Any thoughts as to my being on the right track or other ideas? Appreciated!
symconfigure -sid xx -cmd "start reclaim on tdev in SG SG_NAME;" commit -nop
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pajamasmarie
19 Posts
548
0
Posted November 27th, 2013 08:00
thanks. Will investigate other events. Audit logs should be helpful.
rawstorage
4 Apprentice
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423 Posts
548
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Posted November 27th, 2013 02:00
Marie,
the fact that this was a couple of hours after the reclaim might be something other than the reclaim causing the utilization or at least contributing; I'd also check the symaudit logs and see what else kicked off during the timeframe you are looking at maybe backup schedule or migration VLUN etc. You might have 2 events contributing to the same spike. If you look at the utilization over the period you might be able to identify the point where utilization peaked and correlate the two.