VTAM Buffer Pool Details

The VTAM Buffer Pool Details reports allow you to view all the data collected in a sample for all buffer pools or for a specific buffer pool for a selected time period.

The data in these reports is collected via periodic D NET,BFRUSE commands issued by the Host Monitor and saved in VSAM data sets. The parameter governing the time interval for the periodic collection is: VTAMBUFINTERVAL, which is set in CONF00.

Note: You must explicitly set VTAMBUFINTERVAL in CONF00; if you do not, the data will not be collected.

The fields in this report are:

Date

Date the sample (D NET,BFRUSE) was taken.

Time

Time the sample (D NET,BFRUSE) was taken.

Sample #

The sample number within the interval requested.

Buffer Pool Name

Name of the VTAM buffer pool.

Buffer Size

The size, in bytes, of each buffer. (Note that for certain buffer pools, such as IOBUF, the size displayed might not match the size specified in the buffer pool start options because VTAM increases the size of some buffers for buffer headers that must be added.

Expansion Increment

The number of buffers to be added during each expansion.

Times Expanded

The number of times that the buffer pool has been expanded (since the last SMS trace record was written, if an SMS trace is active).

Expansion Threshold

The number of available buffers at or below which expansion will occur.

Contraction Threshold

The number of available buffers at or above which contraction will be attempted.

Current Total

The number of buffers currently assigned to the pool.

Current Available

The number of buffers currently available for use.

Max Used

The maximum number of buffers ever used within the pool (since the last SMS trace record was written, if an SMS trace is active).

Max Total

The maximum number of buffers ever assigned to the pool (since the last SMS trace record was written, if an SMS trace is active).

Expansion Limit

The maximum size for the pool. Only applies to the IOBuf pool.

Buffers Requested

Number of buffers requested. Only applied to the IOBuf pool.

 

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