System BufferPool Data.....1

Buffer Pool ----> ---0-- ---1-- ---2-- ---3-- ---4-- ---5--

Curr_Active 51

Read Hit % 7.89

VPOOL Alloc 9000

Exp/Con 0

HPOOL Alloc 0

# Backed Strg 0

Exp/Con 0

Read Fail 0

Write Fail 0

H/V Exp Fail 0

Continued next Slide

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Notes:

Remember that ‘current active’ buffers does not mean the number of pages used or containing data. This is the number of buffers that are ‘not available’ or locked. All buffers (except free buffers when using HiperPools)in a pool always contain data.

Note the buffer pool size information available in the statistics record, and also that an IFCID 202 record containing the Dynamic Zparm information is produced at every statistics interval. Incidentally, it is better to produce statistics records at 15 minute intervals than the default 30 minutes. This provides a better level of granularity than 30 minutes without impacting performance, and also puts the data into the same measurement (elapsed) time frame as normal RMF data at most installations.