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Status Not under consideration
Workspace Db2 for z/OS
Created by Guest
Created on May 7, 2019

RELATED IDEAS

Allow system administrators to specify bufferpool sizes in "M" or "G", rather than pages.

See this idea on ideas.ibm.com

With big memory and bufferpools measured in gigabytes, sizing pools by number of pages becomes tedious and error-prone. A 1GB pool requires one to specify -ALT BPOOL(BPx) VPSIZE(262144). A 5GB pool would be VPSIZE(1310720). Most users use "round" numbers, for example 250000 for 1GB. But in either case, the more characters in the command, the higher the risk of missing a keystroke and causing a pool to collapse in size, which could cause performance issues.

CFRM policies now allow specifying structure sizes in terms of MB or GB...I would like to see the same available for the ALTER BUFFERPOOL command in Db2.

This would allow memory management to line up between SystemZ capacity-planning and Db2 sysprogs as well, in cases where real storage allocations are tightly managed and strictly allocated. You wouldn't have to reverse-extrapolate the amount of memory used based on page-size and number of pages when allocating.

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