There can be a slight decrease in performance when you increase the number of sortworks. Going from say 32 to 48 or 64 probably won't have a major impact. However, jumping to something like 128 or 255, you will see a more noticable impact. If you want to send me the sysout from the sort, I can take a look and see if there's any additional tuning we could do to improve performance and/or decrease the sortwork requirement.
Have a nice day, Dave Betten DFSORT Development, Performance Lead IBM Corporation email: [EMAIL PROTECTED] DFSORT/MVSontheweb at http://www.ibm.com/storage/dfsort/ IBM Mainframe Discussion List <IBM-MAIN@BAMA.UA.EDU> wrote on 01/14/2008 09:30:08 AM: > This just came up. Which is better: to allocate more, smaller, SORTWKnn > DD statements, or fewer, larger, SORTWKnn DD statements, or does it not > really matter. By "better", I mean: "Which will result in a shorter run > time?". > > The question came up due to a huge sort this weekend. DFSORT wanted to > allocate the SORTWKnn space > 3390-3 volume. We only have 3390-3 > volumes. So the question is, do I update defaults to have more than 32 > volumes or do we consider creating 3390-9 volumes for SORTWKnn? > > This is IBM's DFSORT on z/OS 1.8. Yes, I am aware of Syncsort's MAXSORT > capability. No, it will not be considered. End of discussion on that > point, please. > > -- > John McKown > Senior Systems Programmer > HealthMarkets > Keeping the Promise of Affordable Coverage > Administrative Services Group > Information Technology > > The information contained in this e-mail message may be privileged > and/or confidential. It is for intended addressee(s) only. If you are > not the intended recipient, you are hereby notified that any disclosure, > reproduction, distribution or other use of this communication is > strictly prohibited and could, in certain circumstances, be a criminal > offense. If you have received this e-mail in error, please notify the > sender by reply and delete this message without copying or disclosing > it. > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO > Search the archives at http://bama.ua.edu/archives/ibm-main.html ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
