On Monday, December 24, 2012, Richard Neill wrote: > Dear All, > > I think periodic reindex may be the solution. Even after reducing the > autovacuum fraction to 0.05, the index still seems to bloat. >
Since your index is so tiny compared to the table, I'd lower it even more. 0.0001, maybe. However, vacuums can't overlap a table, so you can't get the table to be vacuumed more often than the time it takes to run the vacuum (which took around 4 minutes at default vacuum cost settings in a toy system) and so you may need to lower the autovacuum_vacuum_cost_delay to 0 for this table. (I suspect it is all in cache anyway, so the default settings are too pessimistic.) Finally, you might need to lower autovacuum_naptime, because the usually table also won't be vacuumed any more often than that. > > 1. The documentation still suggests that reindex should not be needed in > "normal" operation... is this true? Or are the docs wrong? Or have I got > such an edge case? > Your case seems pretty far out there to me. Cheers, Jeff
