The amount of in-use buffers in the SMF address space is at or exceeds the buffer usage warning percentage value (see BUFUSEWARN, the default value is 25%) for all the available storage (see BUFSIZMAX, the default value is 128M). As each additional SMF buffer (8M) is made ready for use or becomes available this message is redisplayed with an updated percentage value. When all available storage has been allocated and the buffers are filled, the SMF no buffers processing will be initiated, as requested by parmlib option NOBUFFS. However, if more buffers are de-allocated and the percentage falls below the BUFUSEWARN value (default 25%), this operator message is deleted from the display.
Processing continues. Note that the NOBUFFS option determines SMF's action when the precentage value has reached the 100% level.
Notify the system programmer.
Use the DISPLAY SMF command to check on the status of the SMF data sets. If there are no data sets active, use the SMF dump program (IFASMFDP) to clear one and make it available for use.
The DISPLAY SMF,O command can be used to determine the maximum amount of buffer space available for SMF to use. If the percentage of available space for SMF buffering in use is already at the 100% level, consider increasing the BUFSIZMAX value to allow for additional SMF record buffering. This action can aid in reducing SMF record data loss when there is a spike of SMF recording activity and there is a temporary inhibitor to making the SMF data sets available for use. Since the BUFSIZMAX value can also be reduced from its current setting, if an increase is put into effect to handle a temporary constraint condition, then the BUFSIZMAX value can be lowered when the constraint clears.
In addition, use the DISPLAY SMF,O command to check the record types that are being collected. Reducing the number of record types being collected will slow the allocation and use of the buffers.
System Management Facilities (SMF)
IFASMF
2,10
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