Got some information from following
http://www.depesz.com/2011/07/06/bloat-happens/
What is the general solution to avoid bloating.
> On Tue, 2013-05-14 at 14:51 +0000, S H wrote:
> > I am doing some experiment to understand the behaviour of manual
> > vacuum.
> >
> > I created small table and started doing insertion/deletion/updation on
> > 2 rows in infinite loop. It started bloating around 844 times, but
> > after it stopped bloating.. what could be the reason?
> >
> > In between i am running manual vacuum analyze ( without full option)
>
> Explanation is described here
> http://www.postgresql.org/docs/9.1/static/sql-vacuum.html
>
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>