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MAXBUFSP: Specifying Maximum Target Buffer Space

Default: MAXBUFSP=128K

The MAXBUFSP constraint specifies the maximum amount of virtual storage that dynamic buffering can use to create buffers for a file. The sum of (data CI size * bufnd) + (index CI size * bufni) does not exceed this value for any particular OPEN, unless MAXBUFSP is not at least equal to ((1+strno) * (data CI size)) plus ((strno) * (index CI size)). You specify MAXBUFSP as:

MAXBUFSP=value

Value is validated by the CA Hyper-Buf OPEN intercept routine and must be at least as large as the VSAM calculated minimum allowable buffer space. If the specified value is smaller, CA Hyper-Buf increases your specified value to the VSAM minimum.

If you do not provide any MAXBUFSP value for a particular LEVEL selector, the SYSTEM default value is used.