CA IDMS now tracks and displays a high-water mark for the SYSLOCKS parameter.
SYSLOCKS is an estimate of the maximum number of database locks that can be held at one time. It is used to determine the amount of storage that the lock manager should initially allocate. Because the amount of storage needed to represent a lock is not a fixed value, the high-water mark for SYSLOCKS is a calculated value based on the high-water mark of lock storage in use. CA IDMS tracks this value and includes it in the output of the DCMT DISPLAY LOCK STATISTICS command and the STATUS display of the LOCKMON command.
The following output from the DCMT DISPLAY LOCK STATISTICS command shows both the current and HWM values for the SYSLOCKS parameter.
DCMT D LOCK STAT *** Transaction Lock Statistics *** Local Trans Local Page Global Proxy Global Resource Lock Requests 452 0 0 0 Locks Held 12 0 0 0 - - - - Notify/Longterm Stats - - - - Notify Longterm Share Longterm Update Acquired 0 0 0 Held 0 0 0 - - - - - Storage Management - - - - - SYSLOCKs value: 454 SYSLOCKs HWM: 160 # Times Ovfl # Ovfl Getstg Curr Ovfl Size Ovfl Size HWM Overall: 0 0 0 0 Session: 0 0 0 0 Class: 0 0 0 0 Resource: 0 0 0 0 XES Reqs: 0 0 0 0 Proxy: 0 0 0 0 - - - - - - Miscellaneous - - - - - - Upgrade Reqs: 0 In Place: 0 Denied: 0 Cleanup Calls: 0 Compression Calls: 0 PAGE 00001 - NEXT PAGE:
The following output from the STATUS display of the LOCKMON task also shows both the current and HWM values for the SYSLOCKS parameter.
CA IDMS DB/DC Lock Monitor Version 18.0 Lock Manager Status Tape: GJI00B Storage Summary Startup Overflow Total 242944 242944 Times in overflow Overflow Allocations Overflow Highwater 0 0 0 Notify/Longterm Locks Acquired Freed Pending Notify: 0 0 0 Longterm Share: 0 0 0 Longterm Excl: 0 0 0 SYSLOCKS Startup HighWaterMark 454 160 CA IDMS DB/DC V73 Time:
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