Hello my site has over 200,000 pages - which of them 25,000 are indexed in Google during last 6 months. Now it seems Google is indexing abit slowly, I am getting more links form other sites just to speed up this indexing process. I was wondering, number of URLS in a site map, Can this be the issue ? Thanks in Advance for your help.
You shouldn`t have more than 50.000 link in one sitemap file. I usually use 20.000 link per file and it works good for me.