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| When page set is nearly full, identifying biggest queues |
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| bruce2359 |
 Posted: Mon Dec 23, 2013 7:00 am Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9469
Location: US: west coast, almost. Otherwise, enroute.
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| fjb_saper wrote: |
Have you thought about using
dis ql(*) curdepth where (pageset eq 7)?
Have fun  |
How about low (normal) depth, but really LARGE messages?
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Lex Orandi, Lex Credendi, Lex Vivendi. As we Worship, So we Believe, So we Live. |
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| fjb_saper |
| Posted: Mon Dec 23, 2013 5:26 pm Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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| bruce2359 wrote: |
| fjb_saper wrote: |
Have you thought about using
dis ql(*) curdepth where (pageset eq 7)?
Have fun |
How about low (normal) depth, but really LARGE messages? |
You're supposed to have a least an idea of the message sizes...
But a combination of the Page set and the usage of the buffer pool should be able to pinpoint you to the culprit...
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| bruce2359 |
| Posted: Mon Dec 23, 2013 6:33 pm Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9469
Location: US: west coast, almost. Otherwise, enroute.
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| fjb_saper wrote: |
You're supposed to have a least an idea of the message sizes...
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100 PSIDs (00-99) are possible, messages can be directed to different msgclass(es) and pagesets based on size, depth, longevity, etc..
_________________
I like deadlines. I like to wave as they pass by.
ב''ה
Lex Orandi, Lex Credendi, Lex Vivendi. As we Worship, So we Believe, So we Live. |
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| fjb_saper |
| Posted: Tue Dec 24, 2013 8:25 am Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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Sure but I have never seen a specific queue spanning multiple PSIDs...
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| bruce2359 |
| Posted: Tue Dec 24, 2013 8:46 am Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9469
Location: US: west coast, almost. Otherwise, enroute.
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An individual queue maps to a single pageset through the stgclass attribute.
I've seen more than a few z/OS shops that stick with a small number of stgclasses, partially due to lack of understanding the applications. They miss a wonderful tuning opportunity.
_________________
I like deadlines. I like to wave as they pass by.
ב''ה
Lex Orandi, Lex Credendi, Lex Vivendi. As we Worship, So we Believe, So we Live. |
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| fjb_saper |
| Posted: Wed Dec 25, 2013 1:57 am Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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| bruce2359 wrote: |
An individual queue maps to a single pageset through the stgclass attribute.
I've seen more than a few z/OS shops that stick with a small number of stgclasses, partially due to lack of understanding the applications. They miss a wonderful tuning opportunity. |
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