Performance system values: Base memory pool minimum size

Specifies the minimum base memory pool. (QBASPOOL)

Base memory pool minimum size, also known as QBASPOOL, is a member of the performance category of i5/OS™ system values. You can use this system value to specify the minimum size for the base memory pool. To learn more, keep reading.

Quick reference
Location In iSeries™ Navigator, select your system, > Configuration and Service > System Values > Performance > Memory Pools
Special authority None
Default value 5% of the main storage with a minimum value of 2000 KB
Changes take effect Immediately
Lockable No

What can I do with this system value?

You may specify the minimum size of the base memory pool in megabytes (MB). A memory pool is a logical division of memory (storage) that is reserved for processing a job or group of jobs. The base memory pool contains all memory not allocated by other pools. This pool is specified in the subsystem description as *BASE.

In some circumstances, a machine function may be using storage allocated to the base pool. If this is so, and if the change to the system value would reduce the allocation to less than 256 KB (kilobytes) plus the amount needed by the machine, the system value is changed immediately. However, the actual base pool size will not be reduced below 256 KB plus the amount needed by the machine until the storage in use is released by the machine.

Where can I get more information about this system value?

To learn more, go to the performance system values overview topic. If you are looking for a specific system value or category of system values, try using the i5/OS system value finder.

Related concepts
System values: Performance overview
Related information
System value finder