SYS1 service aids

Internal resource lock manager (IRLM) diagnostic aids include SVC dumps of the IRLM address space in the SYS1.DUMPxx data sets, entries on the SYS1.LOGREC data set, and output from the MODIFY …,STATUS command.

Other IRLM diagnostic aids include:

• z/OS® component trace (CTRACE) entries.
• Db2 performance trace classes 6 and 7.
• IRLM messages and codes.