Which is the best way to identify the root cause of long read latencies using monitors?
A.
Check if the %CPU Busy is above 50%
B.
Check to see if all volumes are in at least 1 Consistency Group
C.
Check the ratio of cache.rhit to cache.miss
D.
Check the difference between fe-director.read-lat and storage-volume.read-latency
Explanation:
D. Check the difference between fe-director.read-lat and storage-volume.read-latency
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A – could be a possible cause
B – not a root cause
C – comparing r.hit:r.miss is not a root cause
D – most convincing root cause
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