Displaying statistics for the PSS coupling facility structure
An example of this panel is displayed in the following figure:
Coupling Facility structure on 05/05/2008 at 14:16:15
Structure name : XBMQA2_CACHE1 Type : Cache
Connection name : IXCLO0D50001 Size : 200192 KB
Data bytes used : 2 KB Used pct . . . : 0 %
Directories . . : 52287 Used pct . . . : 0 %
Directory reads : 0 Buffer fulls . : 0
Deletes . . . . : 0 Timeouts . . . : 0
Data bytes HWM : 2 KB Directories HWM : 1
Reads Writes
Total . . . . . : 1 1
Failures . . . : 0 0
Rate . . . . . : 0 0 *
Xfer . . . . . : .000029 .011551The following table describes the statistics that the subpanel provides.
Field | Description |
|---|---|
Structure name | Name of this coupling facility structure |
Type | Type of coupling facility structure (cache or list) |
Connection name | Unique ID that the coupling facility assigned to this structure connection |
Size | Size of the structure allocated in the coupling facility |
Data bytes used | Number of bytes of the allocated storage currently in use for this structure |
Used pct | Percentage of the allocated storage for the coupling facility structure data area that is currently in use If 100 percent of the data area or directories is used, the coupling facility cannot process XBM requests. |
Directories | Number of directory entries used to track eligible data set |
Used pct | Percentage of the total directory entries that are currently in use If 100 percent of the data area or directories is used, the coupling facility cannot process XBM requests. |
Directory reads | Number of reads from the cache structure’s directory This field remains at zero for the list structure because the list structure has no directory. |
Buffer fulls | Number of times that a local buffer filled while reading from the directory for the cache structure |
Deletes | Number of times that data was deleted from this structure |
Timeouts | Number of times that access attempts to this structure timed out (returning no data) |
Data bytes HWM | High-water mark (the largest amount at one time) of data bytes occupying the allocated storage for this structure |
Directories HWM | High-water mark (the largest amount at one time) of directories occupying the allocated storage for this structure |
Total - Reads | Number of reads that this structure satisfied |
Failures - Reads | Number of failures that occurred during attempts to read from this structure |
Rate - Reads | Rate (in I/Os per second) at which data is read from this structure |
Xfer - Reads | Read transfer response time (in seconds) when data is read from this structure |
Total - Writes | Number of writes that this structure satisfied |
Failures - Writes | Number of failures that occurred during attempts to write to this structure |
Rate - Writes | Rate (in I/Os per second) at which data is written to this structure |
Xfer - Writes | Write transfer response time (in seconds) when data is written to this structure |
Comments