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DB2 Data Sharing and XCF Job Name - Revisited
It's been almost four years since I wrote DB2 Data Sharing and XCF Job Name .
It mostly stands the test of time but there are a couple of things I want to bring up.
I was in the DB2 Development lab a couple of days ago, talking with a couple of developer friends about DB2 Data Sharing and XCF.
They know DB2 Data Sharing and IRLM much better than I do but XCF not so much.
(It's probable that... [More]
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DB2 Data Sharing and XCF Job Name
Back in z/OS R.9 RMF Parallel Sysplex New Fields (in 2007) I mentioned a new field: R742MJOB (XCF Member Job Name.) At the time I had no real customer data so I could only espouse the HOPE that this field would be useful. (When I asked for it to be added to the SMF 74 Subtype 2 record it seemed to me it probably would be.) Now that z/OS R.9 is "mainstream" I'm seeing lots of data at this level.... [More]
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Coupling Facility Subchannel Busy in RMF
In the same meeting with RMF Development as ERBSCAN / ERBSHOW was discussed we talked about Parallel Sysplex instrumentation. (Both XCF and Coupling Facility aspects.) One thing I hadn't noticed is the appearance of Subchannel Busy Percentage as a number in the following three places: In Monitor III In the Spreadsheet Reporter As Overview Condition ("SUBCHBP") I think you can do useful work with... [More]
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z/OS R.9 RMF Parallel Sysplex New Fields
I've just re-read the XCF (74-2) and CF (74-4) sections of the z/OS Release 9 SMF Manual. There are some nice things in there... XCF (74-2) Number of buffer 1KB blocks by path (R742PUSE). This should tell you whether memory waste by over-specifying CLASSLEN is a problem. And some of the other scenarios. Member job name (R742MJOB). I'd like to believe this would tell us which IRLM a given member... [More]
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