Coupling facility data tables: list structure statistics

The statistics are described in detail in the DFHCFS6D data area.

The individual fields have the following meanings.

Table 176. Coupling facility data tables: list structure statistics
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.

Related reference
Coupling Facility Data Table Pools Report
Interpreting server statistics
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