Coupling facility data tables: list structure statistics
The statistics are described in detail in the DFHCFS6D data area.
Reset characteristics: these statistics are produced by a separate server address space, not by CICS®. Following a reset, these fields are reset by the server, not CICS. As a general rule, high and low watermarks (max, min and highest, lowest) are reset to current, counts are reset to zero.
The individual fields have the following meanings.
| Statistic name | Field | Description |
|---|---|---|
| Structure | ||
| S6NAME | Full name of list structure | |
| S6PREF | First part of structure name | |
| S6POOL | Pool name part of structure name | |
| S6CNNAME | Name of connection to structure | |
| S6CNPREF | Prefix for connection name | |
| S6CNSYSN | Own MVS system name from CVTSNAME | |
| Size | S6SIZE | Current allocated size of the list structure. |
| Max size | S6SIZEMX | Maximum size to which this structure could be altered. |
| Lists | ||
| Total | S6HDRS | Maximum number of list headers in the structure. |
| Control | S6HDRSCT | Number of lists in use for control information. |
| Data | S6HDRSTD | Number of lists in use for table data. |
| Structure | ||
| Elem size | S6ELEMLN | Data element size used for the structure. |
| S6ELEMPW | Data element size as a power of 2 | |
| S6ELEMRT | Element side of entry:element ratio | |
| S6ENTRRT | Entry side of entry:element ratio | |
| Entries | ||
| In use | S6ENTRCT | Number of entries currently in use. |
| Max used | S6ENTRHI | Maximum number in use (since last reset). |
| Min free | S6ENTRLO | Minumum number of free entries (since last reset). |
| Total | S6ENTRMX | Total entries in the currently allocated structure (initially set at structure connection time and updated on completion of any structure alter request). |
| Elements | ||
| In Use | S6ELEMCT | Number of elements currently in use. |
| Max Used | S6ELEMHI | Maximum number in use (since last reset). |
| Min Free | S6ELEMLO | Minimum number of free elements (since last reset) |
| Total | S6ELEMMX | Total data elements in the currently allocated structure (initially set at structure connection time and updated on completion of any structure alter request). |
| List entry counts | ||
| S6USEVEC | Usage vector, five pairs of words | |
| S6USEDCT | Number of entries on used list | |
| S6USEDHI | Highest number of entries on used list | |
| S6FREECT | Number of entries on free list | |
| S6FREEHI | Highest number of entries on free list | |
| S6INDXCT | Number of entries in table index | |
| S6INDXHI | Highest entries in table index | |
| S6APPLCT | Number of entries in APPLID list | |
| S6APPLHI | Highest entries in APPLID list | |
| S6UOWLCT | Number of entries in UOW list | |
| S6UOWLHI | Highest entries in UOW list | |
| Main type of CF request | ||
| Table index lists | ||
| Reads | S6RDICT | Number of table index reads. |
| Write | S6WRICT | Number of table index writes to create new tables. |
| Rewrite | S6RWICT | Number of table index writes to update table status. |
| Delete | S6DLICT | Number of table index deletes. |
| Data list controls | ||
| Writes | S6CRLCT | Number of times a new data list was allocated. |
| Rewrites | S6MDLCT | Number of times data list controls were modified. |
| Deletes | S6DLLCT | Number of times a data list was deleted for reuse. |
| Table data record | ||
| Reads | S6RDDCT | Number of data entry reads. |
| Writes | S6WRDCT | Number of data entry writes. |
| Rewrites | S6RWDCT | Number of data entry rewrites. |
| Deletes | S6DLDCT | Number of data entry deletes. |
| Data list controls | ||
| Reads | S6INLCT | Inquire on data list |
| Lock release messages | ||
| Reads | S6RDMCT | Number of lock release messages read by this server. |
| Writes | S6WRMCT | Number of lock release messages sent by this server. |
| UOW index list | ||
| Reads | S6RDUCT | Number of UOW list reads. |
| Writes | S6WRUCT | Number of UOW list writes (usually at PREPARE) |
| Rewrites | S6RWUCT | Number of UOW list rewites (usually at COMMIT). |
| Deletes | S6DLUCT | Number of UOW list deletes (usually after COMMIT). |
| APPLID index lists | ||
| Read | S6RDACT | Read APPLID entry |
| Write | S6WRACT | Write APPLID entry |
| Rewrite | S6RWACT | Rewrite APPLID entry |
| Delete | S6DLACT | Delete APPLID entry |
| Internal CF requests | ||
| S6RRLCT | Reread entry for full data length | |
| Asynch | S6ASYCT | Number of requests for which completion was asynchronous. |
| IXLLIST completion | ||
| Normal | S6RSP1CT | Number of normal responses. |
| Len err | S6RSP2CT | Entry data was larger than the inputbuffer length, which normally results in a retry with a larger buffer. |
| Not fnd | S6RSP3CT | The specified entry (table or item) was not found. |
| Vers chk | S6RSP4CT | A version check failed for an entry being updated, indicating that another task had updated it first. |
| List chk | S6RSP5CT | A list authority comparison failed, mismatch caused by table status update |
| List full | S6RSP6CT | A table reached the maximum number of items causing the relevant list to be marked as full. |
| Str full | S6RSP7CT | The list structure became full. |
| I/O err | S6RSP8CT | Some other error code was returned by IXLLIST. |