RE: stale partition statistics

From: Noveljic Nenad <nenad.noveljic_at_vontobel.com>
Date: Wed, 10 Mar 2021 04:01:51 +0000
Message-ID: <051202c2d02a4e69bed9ea219f0ddd4c_at_vontobel.com>

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<tel:31925916> for my situation.

Mikhail, could you try it, too?

Best regards,
Nenad

Von: oracle-l-bounce_at_freelists.org <oracle-l-bounce_at_freelists.org<mailto:oracle-l-bounce_at_freelists.org>> im namen von: Jonathan Lewis <jlewisoracle_at_gmail.com<mailto:jlewisoracle_at_gmail.com>> Datum Dienstag, 09. März 2021, 7:57 PM
An: ORACLE-L (oracle-l_at_freelists.org) <oracle-l_at_freelists.org<mailto:oracle-l_at_freelists.org>> 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_at_vontobel.com<mailto:nenad.noveljic_at_vontobel.com>> 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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Received on Wed Mar 10 2021 - 05:01:51 CET