发现又多出了一行BA=0700000105276000，这行里
FLAG：524288 换算成16进制后：0x80000(sequential scan only flag)
STATE：3，表示buffer consistent read，表示后续对于block 5/60683的一致性读将会用到这一行，一个data block在buffer cache里可能会拥有多个consistent read 版本，后面也会谈及
TCH：1，表示touch count为1
同时发现BA=07000001084A2000，这行里
FLAG：35651585，转换成16进制0x2200001=0x2000000(Redo Generated since block read)+0x200000(Buffer has been written once)+0x0001(buffer dirty)
***之后再次查询发现BA=07000001084A2000，这行的FLAG又变回了35651584，转换成16进制0x2200001=0x2000000(Redo Generated since block read)+0x200000(Buffer has been written once)
SYS@tstdb1-SQL> select obj,indx,addr,hladdr,flag,lru_flag,class,state,dbarfil,dbablk,ba,tch from x$bh where obj=41231;
OBJ INDX ADDR HLADDR FLAG LRU_FLAG CLASS STATE DBARFIL DBABLK BA TCH
---------- ---------- ---------------- ---------------- ---------- ---------- ---------- ---------- ---------- ---------- ---------------- ----------
41231 31287 000000011099BA50 07000001B6B503D8 35651584 0 4 1 5 60682 070000014A920000 4
41231 147573 000000011099BA50 07000001B6C811F8 35651584 0 9 1 5 60681 07000000F4010000 1
41231 219340 000000011099BA50 07000001B6D3F4F0 524288 0 1 3 5 60683 0700000105276000 1
41231 219341 000000011099B908 07000001B6D3F4F0 35651584 0 1 1 5 60683 07000001084A2000 1
41231 219342 000000011099B7C0 07000001B6D3F4F0 524288 2 1 3 5 60683 0700000162014000 1
41231 280283 000000011099BA50 07000001B6DB20E0 35651584 0 8 1 5 60680 0700000102904000 1