x$bh详解(二)
r is under
OBJ NUMBER Data object number
TCH NUMBER 8.1 Touch Count
TIM NUMBER 8.1 Touch Time
BA RAW(4)
CR_SCN_BAS NUMBER Consistent Read SCN base
CR_SCN_WRP NUMBER Consistent Read SCN wrap
CR_XID_USN NUMBER CR XID Undo segment no
CR_XID_SLT NUMBER CR XID slot
CR_XID_SQN NUMBER CR XID Sequence
CR_UBA_FIL NUMBER CR UBA file
CR_UBA_BLK NUMBER CR UBA Block
CR_UBA_SEQ NUMBER CR UBA sequence
CR_UBA_REC NUMBER CR UBA record
CR_SFL NUMBER
LRBA_SEQ NUMBER } Lowest RBA needed to recover block in cache
LRBA_BNO NUMBER }
LRBA_BOF NUMBER }
HRBA_SEQ NUMBER } Redo RBA to be flushed BEFORE this block
HRBA_BNO NUMBER } can be written out
HRBA_BOF NUMBER }
RRBA_SEQ NUMBER } Block recovery RBA
RRBA_BNO NUMBER }
RRBA_BOF NUMBER }
NXT_HASH NUMBER Next buffer on this hash chain
PRV_HASH NUMBER Previous buffer on this hash chain
NXT_LRU NUMBER Next buffer on the LRU
PRV_LRU NUMBER Previous buffer on the LRU
US_NXT RAW(4)
US_PRV RAW(4)
WA_NXT RAW(4)
WA_PRV RAW(4)
ACC RAW(4)
MOD RAW(4)