RE: dba_tab_mod view

From: Deas, Scott <>
Date: Wed, 13 May 2015 13:46:50 +0000
Message-ID: <>

Since OP mentioned that he was on 11.2, the setting of this value at a table level has been deprecated and is now controlled via the STATISTICS_LEVEL of the database -

If the STATISTICS_LEVEL is set to TYPICAL (default) or ALL, monitoring is enabled by default. Only if the OP had his database’s STATISTICS_LEVEL parameter set to BASIC would he not have any monitoring enabled.


From: [] On Behalf Of Mladen Gogala Sent: Tuesday, May 12, 2015 9:38 PM
Subject: Re: dba_tab_mod view

Also, that will only work for tables that have MONITORING attribute set.

On 05/12/2015 10:48 AM, Deas, Scott wrote: Ram,

After you issue DML, but before you run statistics, you can run dbms_stats.flush_database_monitoring_info to update the views.


From:<> [] On Behalf Of Ram Raman Sent: Monday, May 11, 2015 7:13 PM
Subject: dba_tab_mod view


After seeing lots of global services enqueue deadlock errors in our rac, I was looking up the trace files. I was able to see the sql; the trace files are huge (in GBs) . The sql was simple and was updating one table only repeatedly. I wanted to know how many updates had happened in the table, but the dba_tab_mod view is empty for that table. The table was last analyzed last night. Does this mean that the updates did not happen at all due the deadlock errors?

To my knowledge, the DTM view is emptied out after a stats collection. Is there anything else that would cause the no rows selected for a table from that view. v11.2


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Received on Wed May 13 2015 - 15:46:50 CEST

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