Overhead concerns: RE: Did you compare the CPU *consumption* of TMON and OMEGAMON? We come from MAINVIEW and the rise in CPU consumption is tremendous. 1) OMEGAMON vs TMON - Numerous customers have migrated from TMON to OMEGAMON, on average they experience a 10% drop in CPU consumption in the CICS region. This can be measured with SMF records for entire address space, CICS shutdown stats or SMF110 average CPU for transactions.
2) OMEGAMON vs MAINVIEW - Several factors here; are you measuring internal subsystem overhead or external collector overhead. The external address space overhead is small fraction of the total overhead. You need to look at impact to subsystem plus external. The last time a customer reported this to me, we were 5% less in the CICS subsystem. We are also less in the IMS subsystem. If you are only concerned w/ external address space CPU and you are talking about OMEGAMON IMS, I suspect you have historical bottleneck enabled with DASD impact. MAINVIEW doesn't collect this and its extremely expensive. When customers disable this collection parm the external overhead is comparable to MAINVIEW. RE: What TMON can do in a handful of STC's, takes OMEGAMON 3 times as many STC's. Just too much overhead in my opinion. 1) The real concern is how much overhead the monitoring adds to the monitored subsystem, see above. CICS, IMS and DB2 monitors from all vendors increase the cpu in the subsystems, the question is who increases it less. This subsystem impact far exceeds the external address space, except for z/OS monitors. I haven't been concerned with the number of address spaces since I migrated off MVS/SP to XA. Additional address spaces have very little overhead associated with them, they provide the flexibility to have different dispatching priorities based on the criticality of the address spaces function, like if it not being dispatched could impact the monitored address space. RE: Does Omegamon/CICS support the new SMF 110 compressed format, introduced with CTS 3.2 ? Yes, OMEGAMON provided day 1 support for this. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
