At one level Performance and Capacity Management and Systems Investigation are clearly linked: They share the same data. Or much of it at least. But I think they're linked in another way, too. Over the past few years I've gradually shifted emphasis towards Systems Investigation. But this has only been a slight shift, a "non modo sed etiam" and still only really mainframe. So I'm... [More]
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rmf
memory
capacity
cpu
systems_investigation
cics
wlm
performance
ddf
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Round about now you'd be expecting posts to be geared towards the recent zEC12 announcement, or perhaps CICS TS 5.1 or the DB2 11 Preview, or IDAA V3.
So what this post is about will probably have slipped by unnoticed.
After all you don't spend all your time looking for obscure New Function APARs, do you? But I think some of you will find this one of value, or at least quite interesting. (I... [More]
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db2
qrtcb
mq
smf30
qr
tcb
ukcmg
smf
zec12
cics
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If you think this title is obscure bear in mind the original working title was "Send In The Hobgoblins". 1 When I started to write - actually before the "mind mapping" stage - it was going to be all about inconsistency in the way bits of systems are named. You'll see some of that reflected in the finished article (pun intended) but the post has mostly gone in a different... [More]
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cics
virtualstorage
wlm
z/os
cpu
mq
db2
rmf
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Over the years I’ve written emails with data collection requirements dozens of times, with varying degrees of clarity. It would be better, wouldn’t it, to write it once. I don’t think I can get out of the business of writing such emails entirely but here’s a goodly chunk of it. Another thing that struck me is that the value of some types of data has increased enormously... [More]
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z/os
ftp
smf30
rmf
smf
db2
smf101
mq
cics
batch
wlm
dfsort
terse
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You wouldn’t put all your eggs in one basket, CICSwise, would you?
A naive reading of the CICS TS 5.1 announcement materials might lead you to suppose you could .
This post is about thinking about your CICS region portfolio in the light of this announcement. While every CICS release introduces capabilities that makes it worthwhile to review your region portfolio,
5.1 majors on... [More]
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db2
cics
mq
smf42-6
smf110
smf30
smf
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As you will’ve seen in
WLM Response Time Distribution Reporting With RMF I’ve been thinking about WLM Response Time goals quite a bit recently.
And this post continues the train of thought. It’s very easy to think of WLM Service Classes as being self contained.
For many that’s true - and only their own performance numbers need to be considered for us to understand their... [More]
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wlm
smf72–3
smf30
smf
db2
smf101
was
mq
rmf
cics
omvs
ims
ddf
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When I first heard of Flash Express as part of the zEC12 announcement -
some time before announcement - I thought of one use case above all,
and one of particularly poignant resonance with some of my readers: Dump capture amelioration. Then, in the marketing materials, I heard of others.
And the discussions have grown more numerous recently.
So it’s time I expressed (pardon the pun) my... [More]
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memory
dump
z196
dfsort
stgtest
zec12
flash
paging
sysevent
db2
zflash
express
cics
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There was a time before blogging and what I'm about to talk about is something I used to explain quite often back in those days. Reminded by a current customer situation - and needing to explain it again - I thought it time to do it this way. (Here I'm presenting a simplified view, but one that covers the salient features that might help you.) The CICS / DB2 Connection code provides a number of... [More]
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smf101
reuse
c1
db2
thread
class2
class1
smf
accounting
c2
cicspa
cics
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Every year I like to debut one new presentation, though that isn't a firm rule:
In 2012 I debuted
"Send In The Clones" (SITC) 1 and
"I Know What You Did Last Summer" (IKWYDLS), but actually
only the first one was written in 2012. Of course presentations are "slow trains coming": I widely trailed my desire to write
IKWYDLS in 2011 and finally revealed it early this year.
(In fact it... [More]
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db2
cics
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This post is about unusual ways of using the SMF 30 Usage Data information, some of which you're certain to want if you're managing z/OS systems' performance. A long time ago I noticed character strings in SMF 30 records that looked like product names. (As is my wont I was looking at the raw Type 30 records for a different purpose and spotted them.) Some time later I figured out these were Usage... [More]
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z/os
was
chargeback
smf
usage
smf30
db2
cics
websphere
mq
ims
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I can tell when a CICS region came up - without looking at CICS-specific instrumentation. What's more I can repeat the "trick" for any of MQ, DB2, IMS, etc - and so can you . I've just started work on a new piece of reporting. I'll call it "raddrspc" as that's the name of the REXX EXEC that I'm writing. It's about address spaces - most notably long-running ones. In the... [More]
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interval
dossier
uptime
ims
smf
addressspace
db2
mq
smf30
job
cics
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It's said that imitation is the sincerest form of flattery. In this Social Media age I'd say indirection comes a pretty close second. Indeed there's a nice term for it: "link love". Standard advice is not to just post links to the content of others. In reality the word "just" should probably be inserted: Don't just post links to the content of others. In that vein I want to... [More]
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stcke
adata
dfsort
dsect
cics
hlasm
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The CICS Monitor Trace SMF Record (Type 110) has got to be one of the most complicated SMF records in existence - and for good reason. Which is precisely why I'm not going to attempt to process the raw records in my code. (And why PMCICS doesn't support releases after a certain point.) But the "and for good reason" hints at the fact I think this is a tremendously valuable type of... [More]
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dfhmndup
dfsort
dictionary
rmf
dfh$mols
cicspa
mct
cics
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You'd think it would be pretty simple to draw a line. Right? This post discusses an enhancement I'd like to make to my current reporting - and I'm pretty sure that technically I can do it. The question is whether I should . Consider my current "Memory by address space within Service Class" graph. Here's a sample: And here's what I think I might like it to look like: Obviously the line's... [More]
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excp
rexx
memory
cics
smf
interval
gddm
mxg
smf30
rmf
cpu
slr
db2
smf72-3
smf72
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This is the post I was going to write before the discussion that led to CICS VSAM Buffering arose. It's about getting more insight into how WLM is set up and performing than RMF Workload Activity Report data alone allows. I recognise some of this can be done with the WLM policy in hand. But this is about an SMF-based approach. (The piece you can't do with SMF is discerning the WLM classification... [More]
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workload
smf30
smf
report_class
transaction
service_class
wlm
smf72
smf72-3
served_class
ddf
cics
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