On Wed, 2005-09-28 at 09:07 +0200, hubert depesz lubaczewski wrote:
> database has quite huge load of updates, but i thought that vacum will
> guard me from database bloat, but from what i observed it means that
> vacuuming of b-tree indices is somewhat faulty.
No, thats perfectly normal.
Indices are packed tighter when they are first created and they spread
out a bit as you update the database. Blocks start at 90% full and end
up at 50% full for non-monotonic indexes (e.g. SERIAL) or 67% for
monotonic.
It's a long debated design feature on any DBMS that uses b-trees.
REINDEX or dump/restore should be identical.
Best Regards, Simon Riggs