I Have one Word Press Site and I'm Using XML Sitemap Generator plugin for wordpress it was showing me error in sitemap that it was not creating it the sitemap size is 25 mb may i know the problem.
sitemaps are just xml text files so no way will they be that size unless you have an incredibly large site spanning millions of pages. What is the error message?
The Sitemap Protocol limits sitemap files to 10MB (or 50,000 URLs). It is easy to fluff up a huge sitemap file with long URLs, including the priority, changefreq, and lastmod bits of info. One suggestion is to streamline the sitemap by eliminating the extra info (just include your URLs) as long as they contain 'default' info. Just use those extra bits on special URLs such as your homepage, storefront, or category pages. In my experience, long URLs can reach the 10MB limit in about 30-40k URLs. Using the extra info cuts that in about half.
You should limit your sitemap. Only put your top priority URLs to your sitemap if you have that huge sitemap.