Hi Nenad,
Mikhail, could you try it, too?
create new histograms, because, for example, the table statistics are
locked.
exec dbms_stats.delete_table_stats('owner', 'table_name', stat_category=>'OBJECT_STATS,SYNOPSES')
exec dbms_stats.gather_table_stats('owner', 'table_name')
Yes, Nigel confirmed it.
The autostats procedure will set flags to 8 for all partitions if it can‘t
create new histograms, because, for example, the table statistics are
locked.
I‘m about to test the bug fix 31925916 for my situation.
Mikhail, could you try it, too?
Best regards,
Nenad
*Von: *oracle-l-bounce@xxxxxxxxxxxxx <oracle-l-bounce@xxxxxxxxxxxxx> im
namen von: Jonathan Lewis <jlewisoracle@xxxxxxxxx>
*Datum *Dienstag, 09. März 2021, 7:57 PM
*An: *ORACLE-L (oracle-l@xxxxxxxxxxxxx) <oracle-l@xxxxxxxxxxxxx>
*Betreff: *Re: stale partition statistics
I think flags = 8 indicates missing or inconsistent histograms.
Regards
Jonathan Lewis
On Mon, 8 Mar 2021 at 19:26, Noveljic Nenad <nenad.noveljic@xxxxxxxxxxxx>
wrote:
Hi Mikhail,
Yes, non-zero flags definitely trigger gathering of stale statistics
regardless of the number of modifications. For flags = 1 that’s a correct
behavior, since it’s a truncate. For flags=8 we still don’t know. I’m going
to chase the application people tomorrow to rerun the load jobs on the
restored database. I hope I’ll catch the culprit in the trace.
Best regards,
Nenad
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