Oracle回滚段使用查询代码详解

171 阅读 0 评论 113 点赞

我是靠谱客的博主平常狗，最近开发中收集的这篇文章主要介绍Oracle回滚段使用查询代码详解，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

大批量执行DML语句造成回滚段大量占用,又回退操作,如何直观查询数据回滚情况?

单机环境查询回滚执行进度

select /*+ rule */s.sid,
   r.name rr,
    nvl(s.username,'no transaction') us,
    s.osuser os,
    s.terminal te,
    t.used_urec rec,
    t.used_ublk blk
 from v$lock l, v$session s, v$rollname r,v$transaction t
 where l.sid = s.sid(+) and
    trunc(l.id1/65536) = r.usn and
    l.type = 'TX' and
    t.ses_addr = s.saddr and
    l.lmode = 6;

单机环境查询回滚执行进度

select /*+ rule */s.sid,
   r.name rr,
    nvl(s.username,'no transaction') us,
    s.osuser os,
    s.terminal te,
    t.used_urec rec,
    t.used_ublk blk
 from v$lock l, v$session s, v$rollname r,v$transaction t
 where l.sid = s.sid(+) and
    trunc(l.id1/65536) = r.usn and
    l.type = 'TX' and
    t.ses_addr = s.saddr and
    l.lmode = 6;

集群环境查询回滚执行进度

select /*+ rule */s.sid,
   r.name rr,
    nvl(s.username,'no transaction') us,
    s.osuser os,
    s.terminal te,
    t.used_urec rec,
    t.used_ublk blk
 from gv$lock l, gv$session s, v$rollname r,gv$transaction t
 where l.sid = s.sid(+) and
    trunc(l.id1/65536) = r.usn and
    l.type = 'TX' and
    t.ses_addr = s.saddr and
    l.lmode = 6;

单机环境查询回滚执行进度

select /*+ rule */s.sid,
   r.name rr,
    nvl(s.username,'no transaction') us,
    s.osuser os,
    s.terminal te,
    t.used_urec rec,
    t.used_ublk blk
 from v$lock l, v$session s, v$rollname r,v$transaction t
 where l.sid = s.sid(+) and
    trunc(l.id1/65536) = r.usn and
    l.type = 'TX' and
    t.ses_addr = s.saddr and
    l.lmode = 6;

总结

以上所述是小编给大家介绍的Oracle回滚段使用查询代码详解，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对脚本之家网站的支持！