@Sumesh – the WP-Supercache latest version says this “Unfortunately since you installed this plugin a duplicate content bug has been found where URLs not ending in a ‘/’ end serve the same content as those with the ‘/’ and do not redirect to the proper URL. To fix, you must edit your .htaccess file and add these two rule”. I am working on it.

@Chetan – Google sends in 80% traffic.

@marghil – Still on Dreamhost shared plan. Shared host do not like spiky traffic since it compromises other sites on the server. Use WP-Supercache and the server load will be much quieter.