I simply ran ‘analyze;’ without table name and I assume that analyzes everything. I just ran ‘analyze assets;’ again
butstill no stats on indexes.
I looked at pg_stats for all our databases. None of them have stats on indexes. Are there any settings disabling this?
Thanks!
Zhihong
> On Dec 26, 2019, at 1:58 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>
> Zhihong Zhang <zhihong@gmail.com> writes:
>> The index name is correct and I ran ‘analyze' multiple times since the index is created. I have dozen indexes, some
arecreated when table is created. None of them is in pg_stats.
>
> You still haven't shown us exactly what you're doing, only asserted that
> you're doing the right thing, which seems somewhat unlikely given that
> nobody has been able to reproduce this behavior based on what you've
> told us so far.
>
> One possible gotcha is indicated by this comment in analyze.c:
>
> * Open all indexes of the relation, and see if there are any analyzable
> * columns in the indexes. We do not analyze index columns if there was
> * an explicit column list in the ANALYZE command, however. If we are
>
> that is, if you did something like "ANALYZE assets(_doc);" it would
> not result in creation of stats for any expression indexes.
>
>> The database is on AWS RDS. Does that make any difference?
>
> Wouldn't have thought that their version of Postgres deviates much
> from community Postgres. If you were talking about Aurora or Redshift,
> I can't speak to what those do.
>
> regards, tom lane