I have listed below various items to save time or reduce costs. I realize
that most of you on this list are
Familiar with these. However, there may be a few users who find one or more
helpful.
Section 2 is more for newbies.
Section 1.
1. Use MODE C command right before PUT or GET. This will compress file
during transmission only and improve runtime by 60 to 70 percent.
2. Turn on CA Reclaim for VSAM KSDS file(s). This will save disk space
and eliminate the need for frequent REORG jobs.
3. LISTC all GDG's and sort output by LAST ALTER DATE. Then consider
deleting all with a Date older than one year.
Also, consider ALTERING those with NOSRATCH to SCRATCH where NOSCRATCH was
specified in error or a tape GDG was changed to DISK .
4. Consider applying a simple MOD to automatically execute ICEGENER or
SYNCGENER vs. IEBGENER. Save 6 to 8 percent CPU and provides additional
stats.
5. Consider changing IEFBR14 for allocating new files to IDCAMS with
SYSIN DD DUMMY. This will release unused disk space.
6. Consider using IDCAMS ALTER to change Catalog's STRNO to 6 or 8 vs.
default of 2 for performance. Also use SPEED vs RECOVERY in define of
DATACLAS.
7. Consider turning off CICSPUSH and CICSPOP for heavily used
Transactions to save CPU and improve response time.
8. Consider using REGION=0M or large region for long running IEBCOPY
steps/jobs. Jobs will run faster due to I/O being done in memory vs
SYSUT3/SYSUT4 disk files.
9. TMS - Verify TMC MASTER and TMC AUDIT have BLOCKSIZE 8840 and 8880
vs. 340 and 370.
10. Consider using IPOUPDTE after a simple one line ZAP to remove the
requirement for PDS to have a member named $$COIBM. This utility can make
multiple changes to all members in multiple files and it has a parm of CHECK
or UPDATE.
11. TEST Use of ADRDSSU for backup of app files as it can be faster and
more flexible.
11. Identify and Remove Obsolete or Duplicate Software, e.g. OS DITTO
- Save Software License Cost
12. Change large tape file(s) to PSE on disk
Section 2.
1. SDSF CMD to display old jobs that do not get purged by normal purge
commands
In SDSF use ST then PRE * , then OWNER * , the ST+ then browse the first
few jobs and you may find several that are very old and they can then be
purged. This should be done on all LPARS.
2. In ISPF enter CMD SWAPBAR ON. This will cause a screen name to be
displayed at the bottom left of your screen. There will be a screen name
for each START CMD that has been done. The active screen will have an *
e.g. *dslist . You can go directly to any screen listed by clicking your
mouse on the desired screen name. This feature stays turned on for your
next logon and until you enter SWAPBAR OFF.
3. Use QW;S to access info on your DASD environment. Also, these
CMDSs can be executed in a Batch job.
4. When the message FILE in USE is received - simply hit F1 twice or
F1F1 and the system will display who has the file.
5. When editing a file do CC CC A to copy a range of lines AFTER line
A, a new feature allows the use of CC CC AK on as many lines as wanted and
then A on the last location for the copy. Lines are copied to multiple
locations with one cmd.
6. After using START command to start more than one screen, you can
enter =XALL to close all screens.
7. In ISPF use command 0 for settings then go to page 2 and change 3278
screen display to 1 for DATA vs. STD
This will automatically allow your screen to display up to 120
columns vs. only 80.
8. In SDSF change FIND LIMIT to 99999 vs default of 5000 as this
will speed up log searches.
9. Use SRCHFOR command in 3.4 for pds/pdse files to find a 'STRING'
in all members.
10. Use KEYS command to change your PF KEY settings, e.g. change F9
to SWAP NEXT vs. SWAP.
11. Use ISPF APPEND CMD to create a personal DSLIST of files
frequently used with different DSN Qualifiers.
12. Find DSN WAITING messages(longer than X minutes) on SDSF log and
then research to find a way to eliminate the WAIT.
13. Verify that JES Estimated lines is set to greater that the old
default of 5K and also review jobs that create over 100k lines for options
to reduce the output lines.
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