You are noticing messages like this in your CICS LOG from time to time:
14.02.55 STC13791 +TN0894W Field=pggcl accumulation over maximum value.
14.03.01 STC13791 +TN0894W Field=pgpcl accumulation over maximum value.
The description of the message from the Message Guide is:
Field=aaaaa accumulation over maximum value. TRAN=bbbb
This message indicates that an internal counter aaaaa is greater than or equal to X'FFFFFFFF' for transaction bbbb.
This situation can occur when a CICS transaction is run very frequently without being monitored by CA Mainframe Application Tuner.