Re: stale partition statistics

Nenad,

Have you told us a version number? I can't find one in the email trail.

Regards
Jonathan Lewis

On Mon, 8 Mar 2021 at 18:54, Noveljic Nenad <nenad.noveljic_at_vontobel.com> wrote:

> The statistics were gathered as follows:
>
>
>
> SYS.DBMS_STATS.GATHER_SCHEMA_STATS (
>
> OwnName => ‘USER',
>
> Options => 'GATHER STALE',
>
> Method_Opt => 'FOR ALL COLUMNS SIZE REPEAT ',
>
> Degree => 4,
>
> Cascade => TRUE,
>
> No_Invalidate => FALSE);
>
>
>
> All partitions had stale_stats = ‘NO’. Tthe amount of changes didn’t
> exceed the staleness thresholds.
>
>
>
> Yet the gather_schema_stats considered the statistics stale because of
> MON_MODS_V.flags=8 on all partitions. The number of modifications isn’t the
> only criteria for staleness. Gather_schema_stats dropped and recalculated
> all the synopses for this table.
>
>
>
> Interestingly, when I executed gather_table_stats, synopses weren’t
> recreated, even when flags=8.
>
>
>
> My entertainment for tomorrow is to figure out what set MON_MODS_V .flags
> to 8, unless somebody knows the answer. Truncate, for example, sets it to
> 1.
>
>
>
> Best regards,
>
>
>
> Nenad
>
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