I successfully added four sitemaps to webmasters tools.

Each xml file is for separated kind of URLs (news, reviews, gallery, menu pages) and each file have different priority from 0.1 - 1.

Google indexed more than 4000 URLs till now, but I got warnings for 3 files:

All the URLs in your Sitemap have the same priority.
All the URLs in your Sitemap are set to the same priority (not the default priority). Priority indicates the importance of a particular URL relative to other URLs on your site, and doesn't impact your site's performance in search results. If all URLs have the same priority, Google can't tell which are more important.

Do I need to give each URL different priority. It's impossible for me because xml is generating dynamically and there are more than 4000 URLs.

Can I ignore this warning and Google will keep indexing pages in further?

You don't have to put all URLs in your sitemap. Just put the important one's and specify what is priority of each page.

If all pages have the same priority, just ignore this warning, if not, do what j.master said.

That's ok for small sites, but mine have more than 10,000 pages and number increasing every day.

Because of that I created a dynamic XML files separated by URL types and give them different priority, but it's very hard to specify priority to each URL in these files.

So, I can ignore this warning?

I would be better is you submit the links of your site to those sites than google Frequently visited, by that your site will be index fast.

You know what pages are most important, make sure you give them greater priority, others keep the default value. Ignore Google warning, all of your pages will be indexed if they have unique content on it (meaning that you don't repeat large amount of same content on different pages).

In one sitemaps you can use up to 10000 URLs, there are no problem.

Automated tools for sitemap generation will set the priority on its own and even if there is warning from google about the priority, it may not be taken seriously. It would be ideal to limit the number of pages in a sitemap to not more than 1000 in case of a very large site for easy access.

If you can't figure out what pages on your site are more important than others I'm not sure that you should be in internet marketing

Originally Posted by igorsa

It's impossible for me because xml is generating dynamically and there are more than 4000 URLs.

Generate it algorithmically?

Originally Posted by igorsa

Can I ignore this warning and Google will keep indexing pages in further?

Yes. It's a warning, not an error.

Originally Posted by swity

In one sitemaps you can use up to 10000 URLs, there are no problem.

Nop.
In one Sitemap file you can use up to 50,000 URLs and that file must be no larger than 10MB when uncompressed. If you want to list more than 50,000 URLs, you must create multiple Sitemap files.
Source: http://www.google.com/support/webmas...y?answer=35654

More information about sitemaps can be found here:
http://googlewebmastercentral.blogsp...label/sitemaps