Teodor Sigaev wrote:

>   * GIN stores several ItemPointer to heap tuple, so VACUUM FULL produces
>     this warning message:
>      WARNING:  index "idx" contains 88395 row versions, but table contains
>                     51812 row versions
>      HINT:  Rebuild the index with REINDEX.
> 
> We appreciate any comments, help and suggestions. For third item we haven't 
> idea how fix it except to exclude GIN index from check.

How about adding a column to pg_am indicating "these indexes must always
keep same tuple count as heap".  This would be true for all current AMs,
false for GIN.

-- 
Alvaro Herrera                                http://www.CommandPrompt.com/
PostgreSQL Replication, Consulting, Custom Development, 24x7 support

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