TPDC Manual (G06.24+)

Using the SPAM Performance Data Charts and
Reports
Tandem Performance Data Collector (TPDC) Manual—526357-001
5-10
Disc Cache Performance (DCPCHRT)
•
Output bits per second
•
Primary I/O process CPU busy percentage
•
Primary I/O process receive queue milliseconds per request
•
Primary I/O process CPU busy milliseconds per request
•
Average input bytes per request
•
Average output bytes per request
•
Actual primary I/O process name if the line is multiple
This chart uses the GLOBINFO, UNLINES, and PROCESS entities.
Parameters used are:
•
LID—specifies the Measure Load ID
•
SECTION—specifies the report section number
The chart is sorted in descending order of line type and total input and output bytes.
Disc Cache Performance (DCPCHRT)
This 80-column chart displays each logical disk volume’s disk cache performance. The
measure of performance is the volume’s cache misses expressed as a percentage of
the sum of its cache hits and cache misses.
This chart typically displays an optimistic view of each volume's cache performance.
The chart displays cache miss percentage, rather than cache hit percentage, to
provide a more dramatic indication of the performance improvements that might be
gained by optimizing disc cache sizes and utilizations.
Data Communications Line Overview for System \CSO (Release D20)
---------------------------------
Line Type <------PER SECOND-----> <----PER REQUEST----> If MULTI
========= <----Bits-----> CPU RcvQ Rdy <--Bytes--> then:
R $Device Requsts Input Output Busy% msec msec Input Outpt $Device
- -------- ------- =======+======= ------ ---- ---- ----- ----- --------
5600 Line (56, 0)
$LAN1 3.68 4633 986 1.4% 1 5 157 33
------- ------- ------- -----
3.68 4633 986 1.4
------- ------- ------- -----
------- ------- ------- -----
3.68 4633 986 1.4
NOTE: An '*' following a Bit or Byte value indicates that the value
was zero in the LINE entity; the value has been taken instead
from the 'received bytes' (output) or 'reply bytes' (input)
counter of the Primary I/O Process.