Interpreting WebSphere MQ performance statistics

 

WebSphere MQ performance statistics are written as SMF type 115 records. Statistics records are produced periodically at a time interval specified by the STATIME parameter of the CSQ6SYSP system parameter module, or at the SMF global accounting interval if you specify zero for STATIME. The information provided in the SMF records comes from the following components of WebSphere MQ:

Buffer manager	Manages the buffer pools in virtual storage and the writing of pages to page sets as the buffer pools become full. Also manages the reading of pages from page sets.
Coupling Facility manager	Manages the interface with the Coupling Facility.
Data manager	Manages the links between messages and queues. It calls the buffer manager to process the pages with messages on them.
DB2 manager	Manages the interface with the DB2 database that is used as the shared repository.
Lock manager	Manages locks for WebSphere MQ for z/OS.
Log manager	Manages the writing of log records, which are essential for maintaining the integrity of the system if there is a back out request, or for recovery, if there is a system or media failure.
Message manager	Processes all WebSphere MQ API requests.
Storage manager	Manages storage for WebSphere MQ for z/OS, for example, storage pool allocation, expansion, and deallocation.

WebSphere MQ statistics can be collected for two subtypes:

1

System information, for example, related to the logs and storage.

2

Information about number of messages, buffer and paging information. Queue-sharing group information related to the Coupling Facility and DB2.

The subtype is specified in the SM115STF field (shown in Table 15).