Maximum URLs in Google site map

[fffggg]

I have changed the page titles of around three quarters of my site's pages, around 20000, mostly user profiles.

I wish to speed up the re-indexing process, is there any disadvantage to submitting a one off site map to google webmaster tools containing all 20000 urls?

thanks in anticipation

[edited by: fffggg at 10:31 pm (utc) on Aug. 20, 2008]

[tedster]

There's no disdvantage that I can think of. And 20,000 urls is well under Google's stated maximum:

Q: How big can my Sitemap be?

Sitemaps should be no larger than 10MB (10,485,760 bytes) in length when uncompressed and can contain a maximum of 50,000 URLs. This means that if your site contains more than 50,000 URLs or your Sitemap is bigger than 10MB, you must create multiple Sitemap files and use a Sitemap index file. You should use a Sitemap index file even if you have a small site but plan on growing beyond 50,000 URLs or a file size of 10MB.

[google.com...]