Performance Monitor - HP XP P9500 Software User's Manual

Table 100 Error Statuses
Classification
Suspend status
Unexpected status
I/O error in a status
acquisition I/O
Error notification is part of the YKWATCH, YKEWAIT, or YKQUERY command. If the status changes
to an error status such as those above, the YKWATCH command outputs the YKW003E message,
and the YKEWAIT command outputs the YKE003E message, and then terminates with the return
code 8. If you want to be notified of errors, you must execute the YKWATCH command beforehand.
Executing the YKWATCH or YKQUERY command updates information such as the status of REXX
variables. Similarly, pressing the F4=Refresh key in the ISPF window updates the displayed status
information.

Performance Monitor

Performance monitor is a function that monitors events that may cause an error in the future. It also
provides information to help prevent the error or identify the cause of errors when they occur. For
details about the information acquired by Performance Monitoring, see the description about the
Copy Group Status Summary panel in the HP StorageWorks P9000 for Business Continuity Manager
Software Reference Guide.
Performance Monitoring is achieved via the following means:
The YKQUERY command: To obtain the statuses of copy pairs
The YKSTATS command: To obtain Cnt Ac-A and Cnt Ac-J Z copy group performance
information
NOTE:
(the YKSTATS command) is used. For Cnt Ac-J Z, start the Usage monitor from Remote Web
Console for the control unit that includes the journal volumes used in the copy group definition
file. Set the information collection interval for the Usage monitor to 10 minutes or less.
The ISPF panel: To display the consistency group time and the monitoring information shown
in Table 101 (page 555)
Table 101 Monitoring Information
Monitoring Information
Copy pair matching rate
Data transfer rate
Sidefile cache-usage rate
Write pending rate
Error Status
When the pair enters the SUSPER status.
When the pair enters a status other than the target status or a temporary status that
results in the target status.
When an I/O error occurs in a status acquisition I/O.
The Usage monitor must be running when the function to obtain performance statistics
Possible Reasons To Acquire This Information
If the copy pair matching rate is not increasing and the line
usage rate is low, then a line error might be occurring.
If the data transfer rate is low, then a line error might be
occurring.
If the sidefile cache usage rate, which is required for
maintaining the update I/O records in Cnt Ac-A copy groups,
is high, then a cache overflow or a line error might be
occurring.
If the write pending rate is high, then a line error might be
occurring.
Target Copy Type
Cnt Ac-S Z/Cnt
Ac-A/Cnt Ac-J Z
Cnt Ac-A/Cnt Ac-J
Z
Cnt Ac-A
Cnt Ac-A
Performance Monitor 555