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BASE的计算方法为:
gyj@ZMDB> select * from v$type_size where component in ('KCB','KTB'); COMPONEN TYPE DESCRIPTION TYPE_SIZE -------- -------- -------------------------------- ---------- KCB KCBH BLOCK COMMON HEADER 20 KTB KTBIT TRANSACTION VARIABLE HEADER 24 KTB KTBBH TRANSACTION FIXED HEADER 48 KTB KTBBH_BS TRANSACTION BLOCK BITMAP SEGMENT 8