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Home > Success Center > Storage Manager (STM) > Node Performance report not documenting performance metrics for IBM SVC 7.3 arrays

Node Performance report not documenting performance metrics for IBM SVC 7.3 arrays

Table of contents

Overview

Cache usage and reporting was changed with the software release of IBM SVC v.7.3. The cache was a single cache with IBM SVC v7.2.  When IBM SVC v7.3 was released, the cache was relocated to an upper and lower cache location. This change caused a few of the metrics that are visible with IBM SVC 7.2 to no longer be supported with the release of IBM SVC v7.3. If you have upgraded to IBM SVC v7.3 some metrics will not be available. The table at the bottom of this knowledge base list the metrics that will not be available with IBM SVC v7.3. 

The following graphic shows how the cache reorganization looks for IBM SVC v.7.3:
ibmsvc1.jpg

List of Statistic Details:

The following table list the metric/statistics that do not exist with IBM SVC 7.3 Node Performance report. They do exist in IBM SVC v7.2.

Metric/Statistic in the Report 
Lowest Track Lock Latency
Lowest Track Access Latency
Lowest Data Transfer Latency
Highest Track Lock Latency
Highest Track Access Latency
Highest Data Transfer Latency
Highest Cache Fullness
Cache CDCB's - Modified List/sec
Cache CDCB's - Modified List
Cache CDCB's - Global Copies List/sec
Cache CDCB's - Global Copies List
Cache CDCB's - Demote Ready List/sec
Cache CDCB's - Demote Ready List
Average Track Lock Latency 
Average Track Access Latency
Average Data Transfer Latency

 

 

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