Silvio Brandani <silvio.brand...@tech.sdb.it> wrote: > So there is something wrong with table statistics. It picks the plan which it calculates to have the lowest cost. If the lowest cost doesn't correspond to the fastest plan, the most common cause is that your costing factors need adjustment. > How can I reset the pg_statistics for this table??? It can also be that statistics are stale or are not fine-grained enough. You can get fresh statistics with the ANALYZE or VACUUM ANALYZE statements. You can change the granularity of statistics globally or for particular columns, but that just changes the behavior of subsequent ANALYZE runs; it doesn't force an immediate run. Your post was a little light on the sort of details which allow people to be most helpful. If problems persist, please read this before posting again: http://wiki.postgresql.org/wiki/SlowQueryQuestions -Kevin
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