On Sun, Apr 21, 2013 at 5:46 AM, sunil virmani <sun...@gmail.com> wrote:

> My DB version is little old - 8.1.18.
>

Your db is exceptionally old and very much unsupported. Vacuum has
massively improved since 8.1 .

See http://www.postgresql.org/support/versioning/ regarding supported
versions.

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