Re: v$undostat question
Date: Fri, 15 Feb 2008 18:12:36 GMT
Mark D Powell wrote:
> On Feb 13, 10:00 am, Chuck <skilover_nos..._at_bluebottle.com> wrote:
>> Oracle 184.108.40.206 >> >> How is it possible for maxquerylen to go from 1 to 9000 in a single 10 >> minute interval? Is this a bug? Can't find anything about it on >> metalink. TIA >> >> SELECT begin_time, >> end_time, >> maxquerylen >> FROM v$undostat >> WHERE begin_time BETWEEN >> to_date('10-FEB-08 19:19:19', 'dd-mon-yy hh24:mi:ss') >> AND >> to_date('10-FEB-08 19:29:19', 'dd-mon-yy hh24:mi:ss') >> ORDER BY begin_time; >> >> BEGIN_TIME END_TIME MAXQUERYLEN >> ------------------ ------------------ ----------- >> 10-FEB-08 19:19:19 10-FEB-08 19:29:19 1 >> 10-FEB-08 19:29:19 10-FEB-08 19:39:19 9387 >> >> 2 rows selected
> Interesting. I have no clue and do not have the time to attempt to
> follow up the one idea I have. Namely if the database was just
> restarted about 19:39 on Feb 10 if the reported query run time could
> include the prior run time for a transaction that now was being rolled
> back after the restart or after a transaction failover.
> By any chance was the database re-started around the time of the first
Nope. Instance has been up for nearly a year.
> Is TAF is use on this system? (If so, was there a failover)
TAF? The instance is on a clustered node (Veritas active/passive) but has stated above has been up on the same node for nearly a year.
> I bet the answer is no to both but those were the only ideas I had.
> That would leave a 220.127.116.11 bug of some kind.
That's what I'm guessing too. Well, this instance will finally go to 10gR2 in about a month so I'm not too worried about it.
Thanks all. Just wanted to be sure I wasn't overlooking something. Received on Fri Feb 15 2008 - 12:12:36 CST