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manuwankenobi
New User
Joined: 02 Mar 2006
Posts: 32
Location: FRANCE
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Hi all,
We have many sort JOBS running at the same time, and, sometimes, our storage group for sortworks becomes full and we get some abends.
I would like to estimate for each sort how much work space will be needed for a simple sort, is there a formula ?
I saw a thread there which tells that there are many factors,
www.ibmmainframes.com/viewtopic.php?t=34889&highlight=storage
but I would like a simple formula to approximate the space for sortworks (dynamically allocated), so that I will avoid to run at the same time JOBS that will exhaust the sortwork storage group.
An other question : can I find somewhere in SMF the real space used by a job ?
Thank you very much. |
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Terry Heinze
JCL Moderator
Joined: 14 Jul 2008
Posts: 1249
Location: Richfield, MN, USA
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| Correct me if I am wrong, but I believe most SORT products have the ability to define their own sort work areas. No need to know in advance how much you'll need except in special circumstances. SYSOUT should tell you how much space your SORT used. |
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manuwankenobi
New User
Joined: 02 Mar 2006
Posts: 32
Location: FRANCE
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Terry,
I have to know in advance in order to avoid running at the same time two or more jobs that will exhaust my storage... |
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Frank Yaeger
DFSORT Developer
Joined: 15 Feb 2005
Posts: 7129
Location: San Jose, CA
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There's no simple formula since DFSORT can use work space in combination with memory objects, dataspace, central storage, etc.
But 1.2 to 1.5 times the input file size is probably as good a rough approximation as any. |
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manuwankenobi
New User
Joined: 02 Mar 2006
Posts: 32
Location: FRANCE
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Thank you Frank.
I'll use this ratio and look at the statitics after. |
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