Anton Britz wrote:
//SORTWK01 DD SPACE=(CYL,(4000,500)),UNIT=TMPDA,
// DCB=(LRECL=2000,BLKSIZE=28000,RECFM=FB)
You may want to change your block size to 0 and let the system determine
the best size. Your size of 28000 is actually too big for 1/2 track
blocking. The largest block size you have to get 1/2 track is 27,998.
With 28000 you get 14 records per block, but only 1 block per track.
For a record size of 2,000 the system determind to use 18,000, which
gets you 9 records per block, but you can get 3 blocks per track which
yields 27 records per track.
Almost twice as much as you are getting!! Which mean you need about 1/2
of the sort work space you are allocating and my guess is you will cut
your run time down as you are getting more records per I/O.
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