large objects & space usage

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Hi List;

I'm engaging with a client who is trying to solve what sounds like a bloat 
issue. However in further conversations they told me this:

1) we have a table that is an integer key and a blob column
2) the table was at 30Gig, we went in and deleted the last 2 months of data 
and it's still at 30Gog

At this point I thought bloat and that vacuum full or a table rebuild would 
fix the issue.  However later they told me:

3) we did a pg_dump and a reload into a database on the test box and the table 
is still 30Gig.

I haven't gotten access to their servers yet so I only have the above info 
however I wonder is there special space considerations or storage 
requirements, etc with blobs ?

Thanks in advance...

/Kevin

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