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- Comments: Gated by NETNEWS@AUVM.AMERICAN.EDU
- Path: sparky!uunet!paladin.american.edu!auvm!SAMFORD.BITNET!GPBRANHA
- Organization: Samford University Computer Services
- Message-ID: <SQLINFO%93012114105110@UICVM.CC.UIC.EDU>
- Newsgroups: bit.listserv.sqlinfo
- Date: Thu, 21 Jan 1993 12:59:58 CST
- Sender: "Forum for SQL/DS and Related Topics" <SQLINFO@UICVM.BITNET>
- From: "Gene P. Branham Sr." <GPBRANHA@SAMFORD.BITNET>
- Subject: SQL performance
- Lines: 30
-
- I am trying to determine how to improve performance in SQL batch programs.
- These programs are written in COBOL. We are utilizing VM batch to process
- these programs. I have the following questions...
-
- 1). If an index is not clustered at 10000, does reorganizing that index
- help? or does the file need to be dumped and reloaded?
-
- 2). Does any one know if the Reorganize function of DBSU use pages in the
- DBSPACE of the index, or pages in the Internal DBSPACE area for work
- pages?
-
- 3). Is there a rule of thumb to estimate how many pages will be
- needed for a reorganization?
-
- 4). At what clustering level (i.e. 9000 8000 etc.) would you say that
- performance is degraded to the point that table reloading is
- required?
-
- Any information or suggestions anyone can give me on perofrmance tuning
- would be greatly appreciated.
-
- Does anyone know of a consultant that specializes in perfomance tuning?
-
- Thanks for any info!
-
- +======================================================================+
- | Gene P. Branham Sr. | SAMFORD University - Birmingham, AL |
- | (205) 870-2652 | Sr. Systems Analyst |
- | (GPBRANHA@SAMFORD) | Computer & Telecommunication Services |
- +======================================================================+
-