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Excellent article by Dawn May on WRKWCH.
https://www.itjungle.com/2019/02/25/guru-find-the-needle-in-the-haystack-with-watches/
"A major advantage of watches is their efficiency. Watches do not read through a job log like the APIs or the IBM i Service. Rather, watches are implemented as an exit point within the Message Handling component in the operating system. Once a watch is set up, the message handling component checks for the watch when a message is sent. It’s a quick check, and if the watch condition is not matched, logic continues as normal. It is only when the watched condition is matched that any overhead occurs. It is possible to watch every job in the system without a performance impact."
I've been using WRKWCH to monitor certain messages in joblogs.
InfoPrint Ers PQT33073 PQT4154
SSL KTA02033 - SSL RXS_Transmit() encountered unexpected transmission error 28. Error message: Timeout was reached
NetServer CPIAD12 - Servicing user profile XXXXX from client N.N.N.N. Neterver user Connecting
My question to the group, and Dawn,
1) Should each Watch have its own Watch Event program?
2) Or, can a common Watch Event program handle multiple Watches?
Reviewing IBM's Service Monitor, IBM use's one watch event program, QPDETWCH, to handle monitors 0 thru 48.
Monitor 49 has a different watch event program, QMHWCHE1
Thank You
_____
Paul Steinmetz
IBM i Systems Administrator
Pencor Services, Inc.
462 Delaware Ave
Palmerton Pa 18071
610-826-9117 work
610-826-9188 fax
610-349-0913 cell
610-377-6012 home
psteinmetz@xxxxxxxxxx
http://www.pencor.com/
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