I have some software that updates my google sitemap automatically and then submits this to webmaster tools. The sitemap is submitted everytime a new post is added or updated. There may be many updates in a day and I'm wondering if there are any problems submitting the sitemap so often?
As far as I know, it wont raise any flag or whatever, the software just informs the engines about the new content. Nothing unusual.
There is no problem updating your sitemap.xml file in webmaster account. However, there is no need to do it as Google automatically update the sitemap file..
if all your web pages are indexed then why do you need a sitemap......when new content is added then it will be found as i am sure you link it to other content on your site....
If your website navigation structure is good and you have some decent backlinks then you do not need to have a sitemap for crawlers. However, it has been suggested to add a sitemap to let crawlers know about your urls, so that they can easily access your pages from one place..
i think update sitemap.xml is necessary in new site,in new site google update sitemap.xml is very slowly