HP XP Performance Advisor Software - Manual (Page 340)

2. Navigate to the troubleshooting screen.
3. Select the XP array.
4. Select the application.
5. Identify CLPR associated with the LDEVs mapped to the application. In this case, this should
bring up CLPR10.
6. Note the cache usage and read hits on the CLPR10 and plot a chart of the read hits.
The trend should indicate a lower value for read hits and higher value for cache usage.
7. Note the read/write pattern for each of the LDEVs associated with the application. Plot a chart
of the Read response time, Random Reads, Sequential Reads and Read cache hits.
The trend should indicate a lower percentage of read hits and higher value for Read response
time.
8. Based on the trend of the cache usage, cache read hits and LDEV's read hits, the reason for
poor response time on all the LDEVs in the application could be attributed to the incorrect size
of the cache partition on CLPR10 for the nature of I/Os being generated on the LDEVs
associated with the application.
9. Generate a report of the findings above.
340 Troubleshooting issues for components associated with applications