If a data item is written to temporary storage (using WRITEQ TS), a temporary storage queue is built.
The "Writes more than control interval" is the number of writes of records whose length was greater than the control interval (CI) size of the TS data set. This value should be used to adjust the CI size. If the reported value is large, increase the CI size. If the value is zero, consider reducing the CI size until a small value is reported.
The number of "times aux. storage exhausted" is the number of situations where one or more transactions may have been suspended because of a NOSPACE condition, or (using a HANDLE CONDITION NOSPACE command, the use of RESP on the WRITEQ TS command, or WRITEQ TS NOSUSPEND command) may have been forced to abend. If this item appears in the statistics, increase the size of the temporary storage data set. "Buffer writes" is the number of WRITEs to the temporary storage data set. This includes both WRITEs necessitated by recovery requirements and WRITEs forced by the buffer being needed to accommodate another CI. I/O activity caused by the latter reason can be minimized by increasing buffer allocation using the system initialization parameter, TS=(b,s), where b is the number of buffers and s is the number of strings.
The "Peak number of strings in use" item is the peak number of concurrent I/O operations to the data set. If this is significantly less than the number of strings specified in the TS system initialization parameter, consider reducing the system initialization parameter to approach this number.
If the "Times string wait occurred" is not zero, consider increasing the number of strings. For details about adjusting the size of the TS data set and the number of strings and buffers, see the CICS® System Definition Guide.
For more information, see the CICS statistics tables in topics Appendix B. Shared temporary storage queue server statistics and Temporary storage statistics