Home Database Mysql Tutorial Oracle事物处理中回滚段容量的问题

Oracle事物处理中回滚段容量的问题

Jun 07, 2016 pm 05:12 PM

在执行大事务时,有时Oracle会报出如下的错误: ORA-01555:snapshot too old (rollback segment too small) 这说明oracle给此

在执行大事务时,有时Oracle会报出如下的错误:

这说明oracle给此事务随机分配的回滚段太小了,这时可以为它指定一个足够大的回滚段,以确保这个事务的成功执行.例如

  • set transaction use rollback segment roll_abc;      
  • delete from table_name where ...      
  • commit;     
  • 回滚段roll_abc被指定给这个delete事务,commit命令则在事务结束之后取消了回滚段的指定。

    更多Oracle相关信息见Oracle 专题页面 ?tid=12

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