| From: | Zeugswetter Andreas SB <ZeugswetterA(at)wien(dot)spardat(dot)at> |
|---|---|
| To: | "'Jan Wieck'" <JanWieck(at)Yahoo(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | PostgreSQL HACKERS <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | AW: update on TOAST status' |
| Date: | 2000-07-11 14:17:02 |
| Message-ID: | 11C1E6749A55D411A9670001FA687963367FF3@sdexcsrv1.f000.d0188.sd.spardat.at |
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| Lists: | pgsql-hackers |
> It appears that brtee indices (at least) can keep references
> to old toast values that survive a VACUUM! Seems these
> references live in nodes actually not referring to a heap
> tuple any more, but used during tree traversal in
> comparisions. As if an index tuple delete from a btree not
> necessarily causes the index value to disappear from the
> btree completely. It'll never be returned by an index scan,
> but the value is still there somewhere.
Would it be possible to actually delete those entries during vacuum ?
I guess that would be an overall win, no ?
Andreas
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