Shared TS queue server: storage statistics

Storage in the AXMPGANY and AXMPGLOW pools is allocated in multiples of 4K pages on a 4K boundary. The most frequent use is for segments of LIFO stack storage. Storage is initially allocated from the pool using a bit map. For faster allocation, free areas are not normally returned to the pool but are added to a vector of free chains depending on the size of the free area (1 to 32 pages). When storage is being acquired, this vector is checked before going to the pool bit map. If there are no free areas of the right size and there is not enough storage left in the pool, free areas in the vector are put back into the pool, starting from the smallest end, until a large enough area has been created. This action appears as a compress attempt in the statistics. If there is still insufficient storage to satisfy the request, the request fails.

These statistics are for the named storage page pool produced since the most recent statistics (if any). Each of the storage statistics is shown in kilobytes and as a percentage of the total size.

The statistics are described in detail in the DFHXQS3D data area.

Table 175. Temporary storage data sharing: usage statistics LOC=ANY storage pool statistics
Statistic name Field Description
Name S3ANYNAM Name of the storage pool AXMPGANY.
Size S3ANYSIZ The total size of the storage pool.
S3ANYPTR Address of storage pool area.
S3ANYMX Total pages in the storage pool.
In Use S3ANYUS The number of pages currently in use.
Free S3ANYFR The number of pages within the pool that are currently free.
Min Free S3ANYLO The lowest number of pages that have been free (since reset).
Gets S3ANYRQG The number of storage GET requests.
Frees S3ANYRQF The number of requests to release storage within the pool.
Fails S3ANYRQS The number of times that a storage request was unable to obtain the requested amount of storage even after a retry.
Retries S3ANYRQC The number of times that a storage request initially failed and was retried after merging any adjacent small free areas to form larger areas.
LOC=BELOW storage pool statistics
Statistic name Field Description
Name S3LOWNAM Name of the storage pool AXMPGLOW.
Size S3LOWSIZ The total size of the storage pool.
S3LOWPTR Address of the storage pool area.
S3LOWMX Total pages in the storage pool.
In Use S3LOWUS Number of used pages in the storage pool
Free S3LOWFR The number of pages within the pool that are currently free.
Min Free S3LOWLO The lowest number of pages that have been free.
Gets S3LOWRQG The number of requests to obtain storage within the pool.
Frees S3LOWRQF The number of requests to release storage within the pool.
Fails S3LOWRQS The number of times that a storage request was unable to obtain the requested amount of storage even after a retry.
Retries S3LOWRQC The number of times that a storage request initially failed and was retried after merging any adjacent small free areas to form larger areas.

Related reference
Temporary Storage Queues by Shared TS Pool Report
Temporary storage statistics
Interpreting server statistics
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