Version 15.1 User’s Manual

IBM i Performance Navigator Menu (cont)
Description of Jobs:
PERFNAVDR - Data Reduction
This job reads performance data (output from the performance monitor) and writes a summarized
(reduced) set of data into files in MPGLIB. The files in MPGLIB are used by Performance
Navigator to draw graphs.
Note: This job also deletes the raw performance data that is collected via collection services (See “Purge Days” on the next page)
PERFNAVDS – DiSk Collection
This job does a DSPOBJD *ALLUSR/*ALL *ALL OUTPUT(*OUTFILE) OUTFILE(MPGLIB/MPGOBJD).
This is scheduled to run once a week at 3:30 am on Sunday. The data in MPGOBJD is used by
PERFNAVDR (the next time it runs) to collect information on library and object sizes.
PERFNAVIFS – IFS Information Collection Process
This job runs once a week (Sunday 5:00) and collects IFS information used for reporting (i.e.
directory & stream files sizes).
PERFNAVPG – PurGe Reduced Data
This job runs once a month and 'trims back' the amount of reduced performance data. Three
years of highly summarized data is kept.
PERFNAVPM – Check Performance Monitor
This job makes sure the performance monitor (Collection Services) is running. Since the performance
monitor usually keeps itself running, PERFNAVPM usually doesn't do anything.
Version 15 User Manual Page 21 Oct 2011