oracle数据库插入优化

通过程序要把1000万的数据插入到数据表中,刚开始每100条数据耗时50ms左右,但是越往后越慢,最慢到了十几秒的都有,真实好坑了.

于是在网上百度了一波,如何进行insert优化.倒是有了一点小小的优化,但是还是有些慢.具体操作如下:

1.关掉表和索引的nologged日志

alter table human_info NOLOGGING;

alter index PK_PERSON_ID NOLOGGING;

alter index IDX_NAME NOLOGGING;

alter index IDX_ID_NUMBER NOLOGGING;

2.禁用索引,启用,查询索引状态

#禁用
ALTER INDEX PK_PERSON_ID UNUSABLE;
ALTER INDEX IDX_NAME UNUSABLE;
ALTER INDEX IDX_ID_NUMBER_IDX UNUSABLE;
#启用
ALTER INDEX PK_PERSON_ID REBUILD;
ALTER INDEX IDX_NAME REBUILD;
ALTER INDEX IDX_ID_NUMBER REBUILD;
#查看状态
select status  from user_indexes where index_name='PK_PERSON_ID ';
select status  from user_indexes where index_name='IDX_NAME ';
select status  from user_indexes where index_name='IDX_ID_NUMBER ';

3查看sql执行状况

#监控文件系统的io比例
select substr(a.file#,1,2) "#",substr(a.name,1,30) "name",a.status,a.bytes,b.phyrds,b.phywrts from v$datafile a,v$filestat b where a.file#=b.file#;

#查看sql执行来源
SELECT osuser,username,sql_text from v$session a, v$sqltext b where a.sql_address =b.address order by address, piece;

#sql监控器
select * from v$sql_monitor;
select * from v$sql_plan_monitor;