Our production system was migrated from z/VM 3.1 to z/VM 5.1 over the
weekend.
The paging rate was high this morning on the production system as the
VM:Backup backups were running. (It was paging over 2000 pages per second.)
When I did a Q ALLOC PAGE, it indicated the percentage used was 55%.
Presently (the backups have completed):
ind
AVGPROC-015% 01
MDC READS-000142/SEC WRITES-000003/SEC HIT RATIO-093%
STORAGE-000% PAGING-0001/SEC STEAL-000%
Q0-00001(00000) DORMANT-00077
Q1-00001(00000) E1-00000(00000)
Q2-00000(00000) EXPAN-001 E2-00000(00000)
Q3-00000(00000) EXPAN-001 E3-00000(00000)
PROC 0000-015%
LIMITED-00000
Ready; T=0.01/0.01 07:42:42
q alloc page
EXTENT EXTENT TOTAL PAGES HIGH %
VOLID RDEV START END PAGES IN USE PAGE USED
------ ---- ---------- ---------- ------ ------ ------ ----
510PAG F005 1 3338 600840 334304 443511 55%
------ ------ ----
SUMMARY 600840 334304 55%
USABLE 600840 334304 55%
Ready; T=0.01/0.01 07:43:04
Being the system utilization is still low, I am a bit apprehensive as to
what will occur when the system gets busy through the day... Shouldn't the
Q ALLOC PAGE percentage used have dropped?
Thank you.
Cecelia Dusha
