Description of Returned Statistics

The system returns the storage class statistics described below. Mapping macro IXLYCSCS maps the statistics. See z/OS® MVS™ Data Areas in the z/OS Internet library for a description of IXLYCSCS.

Table 1. IXLCACHE Storage Class Statistics Description
Field Name	Description
CSCSREADHITC	Read-hit - Number of times system returned data on a read request.
CSCSRMDIRHITC	Read-miss directory-hit - number of times the system found the named data item identified to the structure with no cached data.
CSCSRMASSUPRC	Read-miss assignment suppressed - number of times the system found the named data item not identified to the structure and the allocation of the directory entry was intentionally suppressed (as a result of ASSIGN=NO on the READ_DATA request).
CSCSRMNAMEASC	Read-miss name assigned - number of times the system found the named data item not identified to the structure and a directory entry was allocated (as a result of ASSIGN=YES on the READ_DATA request).
CSCSRMTSCFULLC	Read-miss target storage class full - number of times the system found the named data item not identified to the structure and a directory entry could not be allocated because no storage resources were available.
CSCSWHITCB0C	Write-hit change bit 0 - number of times unchanged data was written.
CSCSWHITCB1C	Write-hit change bit 1 - number of times changed data was written.
CSCSWMNOTREGC	Write-miss not-registered - number of times a request to write data failed because required connection interest was not previously registered.
CSCSWMINVSTATEC	Write-miss invalid state - number of times a request to write unchanged data failed because the named data item already had cached changed data.
CSCSWMTSCFULLC	Write-miss target storage class full - number of times a request to write data failed because either the named data item was not identified to the structure and no directory entry resource was obtainable, or no data entry resource could be obtained to contain data element resources.
CSCSDIRENTRYRCLC	Directory entry reclaim - number of times a directory entry was reclaimed.
CSCSDAENTRCLC	Data entry reclaim - number of times a data entry was reclaimed.
CSCSXIDIRRCLC	XI for directory reclaim - number of times cross-invalidate was performed as a result of a directory entry reclaim.
CSCSXIWRITEC	XI for write - number of times cross-invalidate was performed as a result of a request to write data.
CSCSXINMINVALC	XI for name invalidation - number of times cross-invalidate was performed as a result of a request to delete a named data item.
CSCSXICMINVALC	XI for complement invalidation - number of times cross-invalidate was performed as a result of a user request to perform cross-invalidation for the named data item.
CSCSCASTOUTC	Cast-out - number of times data has been cast-out.
CSCSREFSIGMISSC	Reference signal miss - number of named data items for the storage class that reference list processing specified but could not find in the structure.
CSCSTMCFULLC	Target storage class full - number of times that the allocation of the directory entry or data entry failed because resources were unavailable and all named data items for the storage class had changed cached data.
CSCSDIRENTRYC	Directory entry - number of directory entries allocated for named data items.
CSCSDATAREAELEC	Data area element - number of data elements allocated for named data items.
CSCSTOTCHNGDC	Total changed - number of named data items assigned to the specified storage class that have changed or locked-for-cast-out cached data.
CSCSDATAREAC	Data area - number of data entries allocated for named data items.
CSCSCMPLREFLSTC	Completed reference lists - number of PROCESS_REFLIST requests in the list that were processed.
CSCSPRTCREFLSTC	Partially completed reference lists - number of PROCESS_REFLIST requests in the list that were processed incompletely because coupling facility time out criteria was exceeded.
CSCSXILCVIREPL	XI for local cache vector entry replacement - number of times cross-invalidate was performed as a result of a request that specified a local cache vector index for a data item to replace an existing index.
CSCSWUXIC	Write unchanged with XI counter - The number of times cross-invalidate was performed as a result of a WRITE_DATA request that specified CHANGED=NO and CROSSINVAL=YES.