| The IRLM commands affect the operation of the IRLM defined to a DB2 subsystem. IRLM commands must originate from an MVS console, and the issuer must have the appropriate security. The following IRLM commands pertain to DB2: | MODIFY irlmproc ,ABEND | Terminates the IRLM identified by irlmproc abnormally, regardless of whether any IMS/VS subsystems are controlled by the specified IRLM. Compare this command with the MODIFY irlmproc , STOP trace command. | | MODIFY irlmproc ,DIAG | Initiates diagnostic dumps for IRLM subsystems. | | MODIFY irlmproc ,PURGE | Releases IRLM locks retained due to a DB2, IRLM, or system failure. | | MODIFY irlmproc ,SET | Can be used to dynamically set parameters for maximum allowable IRLM amounts for CSA, private storage, and number of trace buffers, as well as number of LOCK LTE entries to be specified on the next connect to the XCF LOCK structure, timeout value for a specified subsystem, and local deadlock frequency. | | MODIFY irlmproc ,START trace | Starts internal IRLM traces for the IRLM identified by irlmproc . Valid trace specifications are ITRACE for internal tracing, GTRACE for GTF tracing, PTBTRACE for PTB buffer tracing, or TRACE to start all three types of traces. | | MODIFY irlmproc ,STATUS | Displays the status of the IRLM identified by irlmproc , including information for each subsystem connected to the specified IRLM . | | MODIFY irlmproc ,STOP trace | Stops internal IRLM traces for the IRLM identified by irlmproc . | | START irlmproc | Starts the IRLM identified by irlmproc using an installation-defined proc . | | STOP irlmproc | Stops the IRLM identified by irlmproc . | | TRACE CT, options | Stops, starts, or modifies an IRLM diagnostic trace. |
IRLM Command Guidelines The following guidelines offer practical advice for using commands that impact the DB2 IRLM. Stop the IRLM to Stop DB2 The quickest way to bring down a DB2 subsystem is to issue the STOP irlmproc command from an MVS console. When the -STOP DB2 command does not terminate the DB2 subsystem quickly enough, consider stopping that DB2 subsystem's IRLM. Use the STATUS Parameter to Monitor the IRLM Use the STATUS option of the MODIFY irlmproc command to periodically monitor the effectiveness of the IRLM. |
