HPE XP7 User Manual page 126

Screen element
Frontend CHA Util (%)
Cache Usage (%)
Cache Write Pending (%)
Backend DKA Util (%)
Backend RG Seq Reads (IOPS)
126 Threshold settings
Description
Indicates the average overall MPs utilization on an installed CHA.
PA uses this value to verify whether the average overall utilization
of each CHA MP is within or beyond the set threshold.
The default threshold value is 70%.
NOTE: The CHA Util (%) metric is applicable for the CHA
MPs only on the XP disk arrays.
Indicates the total cache that you define to be utilized for both the
frontend and backend transactions over the threshold duration.
PA uses this value to verify whether the total cache usage is
within or beyond the set threshold limit.
The frontend transactions comprise data transfers between the
cache and the frontend ports. The backend transactions
comprise data transfers between the cache and the LDEVs
through the DKAs.
The cache utilization is in Ok status when the utilization value is
more than 95% of the threshold limit, and when the utilization
value is less than 95% of threshold limit, then the metric is
flagged as Critical.
Indicates the Write pending metric comprises the number of
writes that are pending to be written from the cache to the
LDEVs. The default threshold value is 30%.
The Write Pending (%) threshold value indicates the total number
of write operations that you define can be pending with the cache
over the threshold duration. PA uses this value to verify whether
the total write pending operations are within or beyond the set
threshold limit.
Indicates the average overall utilization of the MPs that can be
utilized on an installed DKA over the threshold duration.
PA uses this value to verify whether the average overall utilization
of each installed DKA is within or beyond the set threshold.
The default threshold value is 70%.
NOTE: The DKA Util (%) metric is applicable for the DKA
MPs only on the XP disk arrays.
Indicates the average sequential backend read tracks that you
define an individual RAID Group can manage over the threshold
duration.
PA uses this value to verify whether the average sequential I/Os
on each RAID Group is within or beyond the set threshold limit.
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