CICSplex Auxiliary Temporary Storage Details attribute group

The CICSplex Auxiliary Temporary Storage Details attributes report on the list of the auxiliary temporary storage pools and queues that exist in the monitored CICS system.

Available Bytes per CI Is the number of bytes available for use in the TS data set control interval.

Buffers Allocated Is the number of temporary storage buffers specified in the TS= system initialization parameter or in the overrides. The number of buffers allocated can exceed the number requested.

Buffers in Use Is the current number of buffers containing active data.

CI Size Is the size of VSAM's unit of transmission between disk and main storage. It is specified in the CONTROLINTERVALSIZE parameter in the VSAM CLUSTER definition for the temporary storage data set. In general, using large CIs permits more data to be transferred at one time, resulting in less system overhead.

CI Writes from Recovery Is the number of writes to control interval from recovery.

CICS Region Name Indicates the job NAME or modify ID of the CICS region being monitored. Each CICS region in a z/OS operating system has a unique NAME. This NAME is an alphanumeric string, with a maximum of eight characters, and case-sensitive. CICS region names are always in uppercase characters.

CIs in Use Is the current number of control intervals containing active data.

Current Buffer Waits Is the number of times a request was queued because all buffers were allocated to other tasks. A buffer wait also occurs if the required control interval is already in a locked buffer, and therefore unavailable, even if there are other buffers available.

Current String Waits Is the current number of I/O requests that are queued because all strings are in use.

Current Write Buffers Is the number of WRITE requests to the auxiliary temporary storage data set. This includes both WRITE requests necessitated by recovery requirements and WRITE requests forced because the buffer must accommodate another CI.

Formatted CI Writes Is the number of times a new CI was successfully written at the end of the data set to increase the amount of available space in the data set. A formatted write is attempted only if the current number of CIs available in the auxiliary data set have all been used.

HWM Buffer Waits Is the peak number of requests queued because no buffers were available.

HWM CIs in Use Is the peak number of CIs containing active data.

HWM of String Waits Is the HWM of Auxiliary Temporary Storage string waits.

HWM of Strings in Use Is the HWM of Auxiliary Temporary Storage strings in use.

Longest Aux Record Length Is the longest Auxiliary Temporary Storage record length.

Max Write Buffers Is the peak number of WRITE requests to the temporary storage data set. This includes both WRITE requests necessitated by recovery requirements and WRITE requests forced because the buffer must accommodate another CI.

Origin Node Is the combination of z/OS System ID (SMFID) and CICS region NAME. The value format is an alphanumeric string, maximum 32 bytes, and case-sensitive.

When a situation is true, the system compares the origin node NAME in the attribute to the names of managed systems assigned to the item. If the origin node NAME matches the NAME of a managed system, the status of the item changes accordingly. If the names of the origin node and the managed systems do not match, the status of the item remains unchanged.

Percent Buffers in Use Is the percentage of auxiliary temporary storage buffers in use.

Percent CIs in Use Is the percentage of auxiliary temporary storage control intervals in use.

Percent Segments in Use Is the percentage of auxiliary temporary storage segments in use.

Percent Strings in Use Is the percentage of active auxiliary temporary storage strings.

PUTs larger than CI size Is the total number of writes of records whose length was greater than the control interval (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.

Segment Size Is the number of bytes per segment.

Segments in Use Is the number of segments in use.

Segments per CI Is the number of segments in each TS data set control interval.

Strings Allocated Is the number of temporary storage strings specified in the TS= system initialization parameter or in the overrides. The number of strings allocated can exceed the number requested.

Strings in Use Is the number of auxiliary temporary storage strings containing active data.

System ID Indicates the four-character NAME that uniquely identifies an active z/OS operating system within a given CICSplex. The value format is an alphanumeric string, a maximum of four characters, and is case-sensitive. z/OS System IDs are always in uppercase characters.

Total Buffer Waits Is the total number of times a request was queued because all buffers were allocated to other tasks. A buffer wait also occurs if the required control interval is already in a locked buffer, and therefore unavailable, even if there are other buffers available.

Total CI Reads Is the total number of control interval Reads.

Total CI Writes Is the total number of control interval Writes.

Total CIs Is the total number of Control Intervals.

Total I/O Error Is the total number of I/O errors.

Total Segments Is the total number of segments.

Total String Waits The HWM of Auxiliary Temporary Storage string waits.