Calculating the number of 4-hour periods - Documentation for CMF MONITOR 6.1

The figure below and the steps that follow provide an example of the values and the calculation that determine the value of the NUMBER OF 4-HOUR PERIODS field in the Rolling 4-Hour MSU Usage Distribution Section of the CPU Utilization Report.

Figure 1. NUMBER OF 4-HOUR PERIODS field example

PRODUCED BY CMF ANALYZER (v.r.mm RSL yymm ) CPU UTILIZATION REPORT BMC SOFTWARE, INC. XYZ COMPANY. REQD 13 JUL 10 08.00.00 13 JUL 10 23.00.59 WORLDWIDE HEADQUARTERS SHFT 00.00.00 23.59.00 DAYS=ALL ACTL 13 JUL 10 08.09.00 13 JUL 10 23.09.00 BASED ON REC TYPE/# RECS/# SAMPLES/REC HOURS: 240-1/90/107K/15 70-1/90/107K/15 ----------------------------------------- ROLLING 4-HOUR MSU USAGE DISTRIBUTION CPU FAMILY: 2097 VERSION: 00 MODEL: 507 CEC CAPACITY = 340 PARTITION = SJSB NUMBER OF 4-HOUR PERIODS = 67 CONSUMED MSU 238 237 236 ----- ----- ----- % OF 4-HOUR PERIODS USING MORE THAN THE CONSUMED MSU 3.0 7.5 13.4

To calculate the number of 4-hour periods

1. Determine the total elapsed time of the report, taken from the REC HOURS value in the BASED ON line (15 in the example).
2. Determine the number of recording intervals, taken from the # RECS value in the BASED ON line (90 in the example).
3. Convert the total elapsed time to minutes: 15 hours * 60 minutes per hour = 900 minutes.
4. Calculate the recording interval length = 900 minutes / 90 recording intervals = 10 minutes per interval.
5. Calculate the number of recording intervals per hour = 60 minutes per hour / 10 minute interval = (6) 10-minute samples per hour.
6. Calculate the number of hours following the first four hours: 15 - 4 = 11.
7. Calculate the number of ten-minute recording intervals in 11 hours = (11 * 6) = 66.
8. Add 1, representing the last reporting interval of the first four-hour period = 66 + 1 = 67.

The total is 67 4-hour periods.