TSM DB extension - emergency

[Levi, Ralph]

My TSM DB is 97% full but appears to have more space to expand.  Does it
do it automatically or must I take some action.  Here are the stats from
q DB f=d command.  I am confused about assigned capacity vs. available
capacity.  Can someone please help.

Available Space (MB): 25,000
        Assigned Capacity (MB): 22,036
        Maximum Extension (MB): 2,964
        Maximum Reduction (MB): 556
             Page Size (bytes): 4,096
            Total Usable Pages: 5,641,216
                    Used Pages: 5,475,462
                      Pct Util: 97.1
                 Max. Pct Util: 97.5

Thanks,
Ralph