This parameter specifies the number of extended storage memory segments available for use by the database.
The default is no extended storage memory segments.
Recommendation: Only use this parameter to establish the use of extended storage memory segments if your platform environment has more memory than the maximum address space and you wish to use this memory. When specifying the number of segments, you should also consider the size of the each of the segments by reviewing and modifying the estore_seg_sz parameter.
When both the num_estore_segs and estore_seg_sz configuration parameters are set, you should specify which bufferpools will use the extended memory through the CREATE/ALTER BUFFERPOOL statements.