Library /sys$common/syshlp/SYSMANHELP.HLB  —  Sys Parameters, VCC_MAXSIZE
    The static system parameter VCC_MAXSIZE controls the size of the
    virtual I/O cache. VCC_MAXSIZE, which specifies the size in
    blocks, is 6,400 by default.

    The virtual I/O cache cannot shrink or grow. Its size is fixed at
    system startup.

    To adjust the XFC size, use the VCC_MAX_CACHE system parameter.

    VCC_MAXSIZE is an AUTOGEN parameter.
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