Обсуждение: Vacuum ignores large objects

Is there a reason why vacuum won't vacuum large objects?  AFAIK they
are not really different from ordinary relations, and could be vacuumed
the same way.  If you do a lot of lo_writes to a large object, its file
size grows without bound because of invalidated tuples, so it'd sure
be nice for LOs to be vacuumable...

Trying to force the issue doesn't work either:

lotest=> vacuum xinv150337;
NOTICE:  Vacuum: can not process index and certain system tables
VACUUM
        regards, tom lane

> Is there a reason why vacuum won't vacuum large objects?  AFAIK they
> are not really different from ordinary relations, and could be vacuumed
> the same way.  If you do a lot of lo_writes to a large object, its file
> size grows without bound because of invalidated tuples, so it'd sure
> be nice for LOs to be vacuumable...
> 
> Trying to force the issue doesn't work either:
> 
> lotest=> vacuum xinv150337;
> NOTICE:  Vacuum: can not process index and certain system tables
> VACUUM

Really.  I thought they were just bit buckets.  I didn't realize they
actually contain transaction id's and versions.

--  Bruce Momjian                        |  http://www.op.net/~candle maillist@candle.pha.pa.us            |  (610)
853-3000+  If your life is a hard drive,     |  830 Blythe Avenue +  Christ can be your backup.        |  Drexel Hill,
Pennsylvania19026
 

Added to TODO:
       o Allow large object vacuuming


> Is there a reason why vacuum won't vacuum large objects?  AFAIK they
> are not really different from ordinary relations, and could be vacuumed
> the same way.  If you do a lot of lo_writes to a large object, its file
> size grows without bound because of invalidated tuples, so it'd sure
> be nice for LOs to be vacuumable...
> 
> Trying to force the issue doesn't work either:
> 
> lotest=> vacuum xinv150337;
> NOTICE:  Vacuum: can not process index and certain system tables
> VACUUM
> 
>             regards, tom lane
> 
> 


--  Bruce Momjian                        |  http://www.op.net/~candle maillist@candle.pha.pa.us            |  (610)
853-3000+  If your life is a hard drive,     |  830 Blythe Avenue +  Christ can be your backup.        |  Drexel Hill,
Pennsylvania19026