Oracle回滚段使用查询代码详解

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

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