From: | Bill Martin <bill(dot)martin(at)communote(dot)com> |
---|---|
To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | "pgsql-performance(at)postgresql(dot)org" <pgsql-performance(at)postgresql(dot)org> |
Subject: | Re: Planner selects different execution plans depending on limit |
Date: | 2012-09-18 07:28:25 |
Message-ID: | D48BF41C96B16442B542F5E25C259047011E8118EC@COM211.communardo.local |
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Lists: | pgsql-docs pgsql-performance |
Tom Lane <mailto:tgl(at)sss(dot)pgh(dot)pa(dot)us> writes:
> Bill Martin <bill(dot)martin(at)communote(dot)com> writes:
>> Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> writes:
>>> He can do it without having to change his schema --- but it's the
>>> index column, not the underlying content column, that needs its
>>> statistics target adjusted.
>> How can I adjust the statistics target of the index?
> Just pretend it's a table.
> ALTER TABLE index_name ALTER COLUMN column_name SET STATISTICS ...
> You'll need to look at the index (eg with \d) to see what the name of the desired column is, since index expressions have system-assigned
> column names.
> regards, tom lane
I tried:
ALTER TABLE ft_simple_core_content_content_idx ALTER column to_tsvector SET STATISTICS 10000;
ANALYZE;
and
REINDEX INDEX ft_simple_core_content_content_idx;
All the trouble was for nothing.
Are there any other possibilities to solve my problem?
Best regards,
Bill Martin
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