As plans to merge with DoubleClick go underway, Google plans to split Performics, formerly a DoubleClick property, into two business units: Affiliate Marketing and Search Marketing.

Affiliate Marketing will be folded into existing Google services. The Search Marketing component will be sold.

"It’s clear to us that we do not want to be in the search engine marketing business," the Googleblog reads. Selling Search Marketing "will allow us to maintain objectivity and the search marketing business to continue to grow and innovate and serve its customers."

Google has not yet selected a buyer for Performics' search marketing half. It will run as a separate entity until it is sold.