policy for polling rss

Question

I have an application that polls several rss sources on the web.

What is the etiquette when polling other\'s web servers. How frequently to poll, etc?

What a

Answer 1

Google's FeedFetcher claims it polls rss feed slightly less than once per hour.

From: http://code.google.com/apis/ajaxfeeds/documentation/

Feed Crawl Frequency

As the Google AJAX Feed API uses Feedfetcher, feed data from the AJAX Feed API may not always be up to date. The Google feed crawler ("Feedfetcher") retrieves feeds from most sites less than once every hour. Some frequently updated sites may be refreshed more often.