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Oracle(block clean out)的块清除

 2008-09-02 12:45:53 来源:WEB开发网   
核心提示: 提交成功SQL>altersystemdumpdatafile8block36;系统已更改, Startdumpdatablockstsn:8file#:8minblk36maxblk36buffertsn:8rdba:0x02000024(8/36)scn:0x0000.000b2

提交成功 

SQL>altersystemdumpdatafile8block36;

系统已更改。

Startdumpdatablockstsn:8file#:8minblk36maxblk36   buffertsn:8rdba:0x02000024(8/36)   scn:0x0000.000b21dbseq:0x01flg:0x00tail:0x21db0601   frmt:0x02chkval:0x0000type:0x06=transdata   Blockheaderdump:0x02000024   ObjectidonBlock?Y   seg/obj:0x739dcsc:0x00.b21dbitc:2flg:Etyp:1-DATA   brn:0bdba:0x2000021ver:0x01   inc:0exflg:0   ItlXidUbaFlagLckScn/Fsc   0x010x000a.02b.000001520x0080a0c5.002a.2aC---0scn0x0000.000b218f   0x020x000a.016.000001530x0080a0cf.002a.0b----1fsc0x0000.00000000   |   |

----这里的FLAG已经清除

data_block_dump,dataheaderat0x3171064   ===============   tsiz:0x1f98   hsiz:0x14   pbl:0x03171064   bdba:0x02000024   76543210   flag=--------   ntab=1   nrow=1   frre=-1   fsbo=0x14   fseo=0x42d   avsp=0x419   tosp=0x419   0xe:pti[0]nrow=1offs=0   0x12:pri[0]offs=0x42d   block_row_dump:   tab0,row0,@0x42d   tl:7019fb:--H-FL--lb:0x2cc:5   col0:[3]c24c3c   col1:[2000]   2f31303037366232335f4f7261437573746f6d446174756d43   6c6f7375722020202020202020202020202020202020202020   20202020202020202020202020202020202020202020202020

... ... 数据内容部分省略  

20202020202020202020202020202020202020202020202020   col2:[2000]   63202020202020202020202020202020202020202020202020   20202020202020202020202020202020202020202020202020   20202020202020202020202020202020202020202020202020   20202020202020202020202020202020202020202020202020   ......   20202020202020202020202020202020202020202020202020   col3:[2000]   63202020202020202020202020202020202020202020202020   ......   20202020202020202020202020202020202020202020202020   col4:[1000]   63202020202020202020202020202020202020202020202020   ......   20202020202020202020202020202020202020202020202020   end_of_block_dump   Enddumpdatablockstsn:8file#:8minblk36maxblk36   --delaycleanout延时块清除   SQL>updatet2setid=id,col1=col1,col2=’c’,col3=’c’,col4=’c’;--8M的更新数据   已更新1000行。   SQL>selectxidusn,xidslot,xidsqn,ubafil,ubablk,ubarecfromv$transaction;   XIDUSNXIDSLOTXIDSQNUBAFILUBABLKUBAREC   ------------------------------------------------------------   38470267881   SQL>COMMIT;

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Tags:Oracle block clean

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