CYL(4 1) should leave one cylinder empty. Cylinder CA will result is a more efficient index.
On Sun, Aug 30, 2020 at 5:12 PM Lizette Koehler <stars...@mindspring.com> wrote: > > List - > > > > I have a VSAM Dataset that has grown over the years. When it was set up - > the INDEX space was left to default > > > > I am wondering if it makes sense to override the Track Allocation and put it > in Cylinders. > > > > We are noticing a little bit of an increase in run time during reorg. I was > wondering if this might be due to the data set having 3.4GB now. This file > is EA/EF so it can grow > > > > Over 4500 Cylinders on the Data > > And the index is using tracks 2 pri and 11 sec - size is now 2.4 MB > > > > > > During reorg we offload records to an archive then reload the current data > back in. > > > > This may be something I cannot improve on, just thought I would see if there > are any insights I am missing. > > > > Process: > Offload the data to a temp file > > Archive records older than 2 weeks > > Del/Def VSAM dataset > > Reload current records to VSAM dataset > > > > This runs daily > > > Thank you > > > > Lizette > > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN -- Mike A Schwab, Springfield IL USA Where do Forest Rangers go to get away from it all? ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
