As promised, here are the comparison statistics. It was an interesting
excercise. I used a 1.12 system with 2 locals of 49500 tracks each, about 21%
in use in the first dump, 14% in the second. 2GB central, 2 logical cps.
Dump options in the first dump (essentially 'dump everything'):
CSA ALSO LSQA, SP(229:230,236:237,249) IN ASID(ALL)
ALSO DATASPACES OF ASID(ALL)
ALSO PAGETABLES OF DATASPACES
ALSO SP(ALL) IN ASID(ALL)
ALSO HIGH VIRTUAL IN ASID(ALL)
Dump options in the second dump ('my options'):
CSA ALSO LSQA, SP(229:230,236:237,249) IN ASID(ALL)
ALSO RANGE(ALL) IN ASID(ALL)
ALSO DATASPACES OF
ASID('CONSOLE','*MASTER*','RASP','OMVS','JES2','SMSPDSE','SMSPDSE1')
ALSO SP(ALL) IN ASID(SYSKEY)
ALSO PAGETABLES OF DATASPACES
Set the next to a fixed font, it appears in columns, first dump stats, then
second dump stats:
Total Dump Statistics
Elapsed time 00:02:42.98 00:02:09.53
CPU busy percentage 4 4
Average output data rate 14.52 MB/s 16.26 MB/s
Address space real pages 231,068 218,489
Data space real pages 206,406 217,841
High virtual real pages 47,350 40,163
Address space immediate aux pages 8 2
Data space immediate aux pages 128 0
Address space deferred aux pages 165,950 112,167
Data space deferred aux pages 29,659 8,408
High virtual deferred aux pages 28,457 615
IARPFT Data Space Dump Statistics
Elapsed time 00:00:02.96 00:00:03.60
CPU busy percentage 50 50
Average output data rate 12.49 MB/s 10.24 MB/s
In Real Virtual Dump Statistics
Elapsed time 00:00:30.01 00:00:53.89
CPU busy percentage 10 5
Average output data rate 53.03 MB/s 28.99 MB/s
Address space real pages 231,068 218,489
Data space real pages 206,406 217,841
High virtual real pages 47,350 40,163
In Use Real Dump Statistics
CPU busy percentage 9 5
Average output data rate 25.89 MB/s 13.65 MB/s
Paged Out Virtual Dump Statistics
Elapsed time 00:02:08.71 00:01:09.83
CPU busy percentage 1 1
Average output data rate 5.15 MB/s 5.43 MB/s
Address space immediate aux pages 8 2
Data space immediate aux pages 128 0
Address space deferred aux pages 165,950 112,167
Data space deferred aux pages 29,659 8,408
High virtual deferred aux pages 28,457 615
Single page read rate 6.64 MB/s 0.00 MB/s
Available Real Dump Statistics
Elapsed time 00:00:00.71 00:00:01.20
CPU busy percentage 22 15
Average output data rate 85.23 MB/s 95.48 MB/s
What came as a surprise to me was that even with 'my options' quite a bit was
read from the page datasets. Must be the range(all) in asid(all), plus we don't
use much high virtual since we don't have enough page data sets.
Total elapsed time is only marginally longer when dumping everything, and the
page data sets weren't as full and there wasn't as much dumped in the 'my
options' case. I also have the sneaking suspicion that selecting things instead
of dumping everything may take longer.
As far as I am concerned, 'my options' had been approved before and tested (in
a 6GB real lpar it took about 10 minutes to dump a 1.8. system and 15 minutes
before that for the operators to locate the right book containing the procedure
and then do the procedure as described), so using autoipl/sadump, there will be
less time spent on the sadump. I'll go in future with the 'dump everything'
options.
Thanks to Jim for pushing me in the right direction. (Now, If only I knew what
'Extra Buffers Batch Could Use 161,899' means... and if there is something
I can do about that.....)
Best regards, Barbara
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