3PAR Users Group

Are you using AO, AFC or both for the 8 SSDs?
Was AO running when you saw the latency?

Also the first thing I would look for when there is unexplained LD/VV latency is run the "Physical Drive Compare by Performance" report for the same period and look for a failing physical disk

Absent a failing PD, it could be a few of things - reply with what you see

So which commands are you running?

.srdata is the volume where all performance metrics are stored, so if you are looking at historical data it is expected that there is activity on .srdata and as always you want the response as quickly as possible so it will take what performance it can.

In CLI, «statpd -rw», «statvv -rw -ni», «statvlun -ni -rw» and «statvlun -hostsum -ni -rw» should give you some pointers. If statvlun is high and statvv is low, your issue is 99% host or fabric issue. With and without hostsum can help you understand if it is volume or host related. If statvv is high, the latency is due to something internal on the 3PAR, if statpd latency is high, it is most likely a backend issue (not enough disks/SSD). Always remember that read iops (vlun and vv) is mostly read from disk (around 5-10msec) while write should hit cache (1-ish msec).