Performance Variables of Trend Records X'FC3C'
Trend record X'FC3C' contains data describing NSS performance for individual shared segments.
The selection format for record 3C variables is:
- segno
- is the spool file number of a shared segment for which data are to be extracted, in up to four decimal digits. Note that shared segment data cannot be extracted by segment name because multiple segments with the same name may be active concurrently.
- varname
- is the name of the selected variable, as shown under the heading 'Variable Name' in the table below.
The variables shown in the following table have been pre-defined. Their description also includes the formula used to calculate the values from the original trend record data fields.
| Display | Variable Name |
Variable Description and Derivation
|
|---|---|---|
| NSS | SHARE |
Number of users accessing the segment
in shared mode ( H3CUSHRD / TRNDRSMP ) |
| N-SHR |
Number of users accessing the segment
in non-shared mode ( H3CUSNSH / TRNDRSMP ) |
|
| SAVD |
Number of pages saved in this segment
( H3CPGSAV ) |
|
| NDAT |
Number of pages defined with a 'no data saved'
page descriptor ( H3CPGNSV ) |
|
| RES. |
Number of private resident pages in the segment
( H3CPGRES / TRNDRSMP ) |
|
| XSTOR |
Number of expanded storage blocks occupied
( H3CXSPGS / TRNDRSMP ) |
|
| TRANS |
Page translation rate, per second
( H3CPGTRN / TRNDRELT ) |
|
| STEAL |
Page frame steal rate, per second
( H3CPGSTL / TRNDRELT ) |
|
| PGRDS |
Page read rate, per second
( H3CPGRDS / TRNDRELT ) |
|
| PGWRT |
Page write rate, per second
( H3CPGWRT / TRNDRELT ) |
|
| X-RDS |
Page-in rate per second from expanded storage
( H3CXPGRD / TRNDRELT ) |
|
| X-WRT |
Page-out rate per second to expanded storage
( H3CXPGWR / TRNDRELT ) |
|
| X-MIG |
Page migration rate per second from expanded
storage to disk ( H3CXMIGR / TRNDRELT ) |