Evaluate Performance in Detail › Histograms › Image Residence Histograms › Terminal I/O Per Second Histogram

Terminal I/O Per Second Histogram

The following example shows a terminal I/O per second histogram:

Histograms                      DEMAND (VAX 8700)                       Page   8
PA Vx.x
					Tuesday 06-SEP-2005 00:00 to 23:59
                                                            *---------------*
                                                            |    Legend: 1  |
                                                            |               |
                                                            |  L = LTx      |
                                                            |  T = TTx      |
                                                            |  X = TXx      |
                                                            |  V = NVx      |
                                                            |  W = WTx/TWx  |
                             TERMINAL I/O PER SECOND        |  R = RTx      |
IOs per sec  2               -----------------------        *---------------*
100 !
 95 !
 90 !
 85 !
 80 !
 75 !
 70 !
 65 !
 60 !
 55 !
 50 !
 45 !
 40 !                                    L
 35 !                                    L
 30 !                                  L LL
 25 !                               L  L LL    L    LL
 20 !                            L LLLLL RLLL  LLLL LL L  L
 15 !                           LLLLLLLLLRLLLLLLLLLLLLLL LL
 10 !                         LLLLLLLLLLLRLLLLLRLLLLLLLLLLLL
  5 !                 LLLLLLLLRLLRLLLLLLLRLLLLLRRLRLLLLRLLLLLLLLLLLLLL   LL
    ! ---01-02-03-04-05-06-07-08-09-10-11-12-13-14-15-16-17-18-19-20-21-22-23-
                                                                            3
        Each Column represents approximately 20 minutes starting from
        6-SEP 00:00:00 to  6-SEP 23:59:00.  An "N" indicates NO DATA.

The following statements are keyed to the columns in the previous example:

1. Explanatory list of units in the histogram columns.
2. The number of terminal I/Os per second.
3. Number of hours spanned by the reporting period. This histogram reflects a reporting period of 24 hours.