oracle delete from慢,delete 数据很慢调优解决

delete  from tb_test partition (TB_test_P200711)

where id<=15744829 and id>=14471371

and  created_date between  to_date('2007-11-07 00:00:00','yyyy-mm-dd hh24:mi:ss')

and to_date('2007-11-07 05:59:59','yyyy-mm-dd hh24:mi:ss')

and id not in (select max(ID) id

from tb_test partition (TB_test_P200711)

where created_date between  to_date('2007-11-07 00:00:00','yyyy-mm-dd hh24:mi:ss')

and to_date('2007-11-07 05:59:59','yyyy-mm-dd hh24:mi:ss')

group by client_id, game_code_id, event_date);

commit;

以上sql需要删除60多万条数据,加上分区和时间条件后,速度还可以介绍,只要4-5分钟

但在另外一台机器测试时,很慢,而且结果都出不来,一直运行

通过和正常机器对比, 执行计划都一样 ,表结构和索引,数据都已分析

最后只能能数据库层看了,看下alert_ora9i.log 日志文件

日志报有坏快

Errors in file /orasys/oracle/admin/ora9i/bdump/ora9i_smon_3928.trc:

ORA-01578: ORACLE data block corrupted (file # 38, block # 502423)

ORA-01110: data file 38: '/oradata/ora9i/game_lagindex08.dbf'

用以下语句查出看是什么对象类型:

selectsegment_type,owner||'.'||segment_name

from dba_extents

where38= file_id and502423between block_id and block_id+blocks -1;

查出来是

这个表的索引有损坏,

然后删除重建,再执行那delete sql 正常

该表索引损坏导致delete不正常