Google Crawling Issues, Best Practices, Troubleshooting
First of all, Google indexation is hard to measure for a large site. There can be false alarms having to do with people using Google's site: operator, supposed to report the site's indexation count. It works well for small sites but is wildly unreliable for large ones and tends to severely underreport the count. Webmaster Tools is better for this, but possibly also unreliable. If your site is enormous, there is simply no certain way of knowing how many pages Google has indexed. For additional helpful data, check Google Analytics to see the total number of pages that have received visits. I also recommend that you manually run cache: checks of all your most important pages and of various random secondary pages to get a further idea of how your site is doing on the indexation front.
I didn't find the right solution from the Internet.
References
http://forums.seochat.com/google-optimi ... 24216.html