This utility collects performance information about the paths managed by HDLM, and then displays the information or outputs it to a file.
If you obtain performance information before starting operation and again during operation, you can check the performance of each path by comparing the obtained information.
- Notes
When the function for displaying performance information is used, the amount of memory required by the HDLM driver increases.
The amount of additionally required memory is as follows:
Amount of memory used by each path: 352 bytes
Maximum amount of memory used: Amount of memory used by each path * the number of paths
The amount of memory used by this utility is as follows:
3MB + (3000 bytes * the number of paths)
Do not change the path configuration while the dlmperfinfo utility is running. If you change the path configuration, the processing to acquire performance information will be interrupted.