Information Systems:Monitoring system performance on IBM i
Performance monitoring
Collection Services
http://www-01.ibm.com/support/knowledgecenter/ssw_ibm_i_61/rzahx/rzahxcollectdatacs.htm
Collects system management data in a management collection object (*MGTCOL) in library QMPGDATA.
Our configuration is -
Configure Perf Collection (CFGPFRCOL)
Type choices, press Enter.
Default interval . . . . . . . . 15.00 *SAME, .25, .50, 1.0, 5.0...
Collection library . . . . . . . QMPGDATA Name, *SAME
Default collection profile . . . *STANDARDP *SAME, *MINIMUM, *STANDARD...
Cycle time . . . . . . . . . . . 000000 Time, *SAME
Cycle interval . . . . . . . . . 24 *SAME, 1-24 hours
Collection retention period:
Number of units . . . . . . . 00024 *SAME, 1-720, *PERM
Unit of time . . . . . . . . . *HOURS *HOURS, *DAYS
Create database files . . . . . *YES *SAME, *YES, *NO
Our performance is collected at 15 minute intervals. Collection lasts for 24 hours. The collection object is kept for 24 hours. The information is written to the data bases as it is collected.
Work with Objects Using PDM BART
Library . . . . . QMPGDATA Position to . . . . . . . .
Position to type . . . . .
Type options, press Enter.
2=Change 3=Copy 4=Delete 5=Display 7=Rename
8=Display description 9=Save 10=Restore 11=Move ...
Opt Object Type Size Text
Q083000045 *MGTCOL 221458432
Q084000049 *MGTCOL 194449408
Q083000045 was created yesterday just after midnight, and collected data for 24 hours. Q084000049 was created just after midnight today, and is still collecting.
‘83’ and ‘84’ are the numbers of the day in this year; 45 and 49 was the time the collector was created (ie 00:00:45).
Archive Performance Data
Every night at 10 minutes to midnight, the performance data is appended to our data files. We do this because collection services builds a new member every time it starts; which maked it difficult for us to use the data.