vacuum vs pg_repack vs pg_reorg

Hi,

I have a database of size 1.5 TB. The attachments are stored in bytea.
The attachment table is consuming maximum space. The database version is
9.1.x and Streaming Replication is set. Now, I have to removed old records
to make way for new records without increasing SAN Space.

Which will be a better option

pg_repack - I have primary key on that table

or
Vacuum

or

pg_reorg

If you can suggest me a better option out of the above, It will simplify my
life. At any cost
streaming replication should not disturbed.

Regards

Ramachandran S

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