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CPU Usage in 3.4 of xxx.*

 
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vasanthz

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Joined: 28 Aug 2007
Posts: 1476
Location: Chennai

PostPosted: Wed Mar 25, 2009 8:21 pm    Post subject: CPU Usage in 3.4 of xxx.*
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Hi,

1) I have a requirement to extract all the PDS(PDS only) that have the HLQ as XXX.*

2) With that list we have a requirement to extract all the PDS that use more than 80% allocated space.

For the first requirement,

I used 3.4 option and gave xxx.* with include Additional qualifiers option set to YES.

It was a huge list and tried to put the SAVE LIST command, but it was taking lots of time (I mean LOTS LOTS LOTS) and i cancelled it.

Will this operation load the mainframe too much? (I mean affecting production jobs)
I have very limited knowledge with catalogs, Will this occupy the catalog too much that it affects production job anyway.


I am aware of second requirement, but not sure about first.
Any advice please?

Thanks in advance,
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ofer71

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Joined: 27 Dec 2005
Posts: 2360
Location: Israel

PostPosted: Wed Mar 25, 2009 8:40 pm    Post subject:
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You can use LMDLIST service with the STATS option.

O.
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CICS Guy

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Joined: 18 Jul 2007
Posts: 2150
Location: At my coffee table

PostPosted: Wed Mar 25, 2009 8:41 pm    Post subject:
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Sometimes I've needed to locate certain SYS1. datasets, and not knowing the second qualifier, I'd do the same 3.4 and got back a large return and it did take some time - mostly wall clock - because the request ends up searching just about all catalogs in the system.
Slow response does not always mean high CPU.....
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expat

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Joined: 14 Mar 2007
Posts: 8593
Location: Back in jolly old England

PostPosted: Wed Mar 25, 2009 8:51 pm    Post subject:
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If you have access to DCOLLECT records you can do this.

use SORT to select only the records you want
Code:

//SYSIN    DD *                                                       
 OPTION  VLSCMP                                                       
 SORT    FIELDS=(29,44,CH,A)                                           
 INCLUDE COND=(9,2,CH,EQ,C'D ',AND,            * D RECORD             *
               79,1,BI,ALL,B'00000010',AND,    * PDS / PDSE ONLY      *
               29,4,CH,EQ,C'XXX.')             * DSN STARTS WITH      *
/*                                                                     


Also in the DCOLLECT records are space allocations and utilisations which will enable you to get the info that you want.

Take a look through the DFSORT documents as I recall Frank has one or two great examples using DCOLLECT data for space related reporting.

ISMF may well be able to get you the information too.
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vasanthz

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Joined: 28 Aug 2007
Posts: 1476
Location: Chennai

PostPosted: Wed Mar 25, 2009 10:12 pm    Post subject:
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Hi,

Thanks 2 Ofer, Expact, "THE CICS GUY". I have no idea of DCOLLECT or LMSLIST.
I will read, try them out and let you know the results.

Thanks 4 ur time.
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vasanthz

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Joined: 28 Aug 2007
Posts: 1476
Location: Chennai

PostPosted: Tue Mar 31, 2009 1:51 am    Post subject:
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Hi I tried the DCOLLECT and processed the O/p with REXX.. thanks a lot icon_smile.gif

http://www.ibmmainframes.com/about30787.html
this thread was also very useful
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