I strongly suggest running
at least on a monthly basis.
I queried SYSPARTITIONSTAT and a few of the tables in QUSRBRM number
deleted rows in the millions. Since many of these contain stream file
information they have large variable length rows. I've seen this recover
25% space on a system!
Schedule carefully. I've seen rgzpfm qusrbrm/qa1ali2 run for a half hour
or more, on guested SSD's!
NAME | NUMBER_DELETED_ROWS
---------- | --------------------------
QA1ALI2 | 17,827,759
QA1ADI2 | 670,867
QA1ANET2 | 473,913
QA1AOD | 291,249
QA1ALG | 38,411
QA1AHS | 11,038
QA1AOR | 4,193
QA1AMB | 854
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