IBM Books


Minimum FCM Buffers Free


Snapshot Information Level
Database Manager

API Structure(s)
sqlm_fcm

Monitor Group
Basic

Resettable

No

 

API Element Name
Element Type

buff_free_bottom
water mark

 

Description:  The lowest number of free FCM buffers reached during processing.

Usage:  Use this element in conjunction with the fcm_num_buffers configuration parameter to determine the maximum FCM buffer pool utilization. If buff_free_bottom is low, you should increase fcm_num_buffers to ensure that operations do not run out of FCM buffers. If buff_free_bottom is high, you can decrease fcm_num_buffers to conserve system resources.

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