Table size - optimization

Feedlog is a central area where theres been a lot of data dumped together
and the beast has grown.

Whats a better way to design the db table(s) for feedlog so we can get a
very large performance gain.

Is there a way we can create a feedlog-history table or yearly tables eg
feedlog-2014 and move old data out of the original table so its a kean fast
table?

What code would need to change to deal with that?

*Some data :*

Size: 8 GB

relname | relkind | reltuples | relpages
-------------------+---------+-------------+----------
feedlog | r | 6.60508e+07 | 9974857

Thanks,
Lucas