Oracle回滚段使用查询代码详解

湛蓝之海

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CodeAE代码之家网站的支持！