Ya ! I got vacuumdb but it is not a backend command. So i could not use it. It is a shell script which wrapes around the backend command and i need to fire it before entering in to psql shell. However that does the same thing which I have done with VACUUM VERBOSE ANALYSE. ( -v for verbose and -z for analyze ) so that won't make any difference. However I am now checking stuff in forum at postgressql.org. will be back soon if get anything helpful.
