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Extent 0 : L1 dba: 0x01800009 Data dba: 0x0180000d
Extent 1 : L1 dba: 0x01800089 Data dba: 0x0180008b
Extent 2 : L1 dba: 0x01800109 Data dba: 0x0180010b
Extent 3 : L1 dba: 0x01800189 Data dba: 0x0180018b
Extent 4 : L1 dba: 0x01800209 Data dba: 0x0180020b
Extent 5 : L1 dba: 0x01800289 Data dba: 0x0180028b
dbaÊÇÒÔ16½øÖƱíʾµÄ(ÒòΪÓÐ0X)£¬×¢Òâ¿´Ò»¹²ÓÃÁË8ΪµÄ16½øÖÆ£¬»»Ëã³É¶þ½øÖƾÍÊÇ32bit£¬¶øÆäÖÐDBAÓÖÓÃ10λÀ´¼Ç¼file_id£¬22bitÀ´¼Ç¼block_id,ÄÇôÔÚÒ»¸öÊý¾ÝÎļþÖÐ×î¶àÄܹ»¼Ç¼2^22¸öblock,Èç¹ûÒ»¸öblock_size=8k,ÄÇôÕâ¸öÊý¾ÝÎļþµÄ×î´óÖµ¾ÍÊÇ8K*2^22,Ò²¾ÍÊÇ32G£¬ËùÒÔÊý¾ÝÎļþµÄ×î´óÖµÓ¦¸ÃÈ¡¾öÓÚ¿é´óС£¬¶øoracle¿é×î´óÖµÊÇ32K£¬Ò²¾ÍÊÇ32G*4=128G¡£
SQL> select power(2,22)*8/1024/1024 from dual;
POWER(2,22)*8/1024/1024
-----------------------
32
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drop table test;
select count(*) from test;
--´´½¨²âÊÔ±í
create table test
(
id number(9),
nick varchar2(30)
);
--²åÈë²âÊÔÊý¾Ý
begin
for i in 1..100000 loop
insert into test(id) values(i);
end loop;
commit;
end;
select * ......