To resolve the RSS feed exceeds 512KB Size Limit

Add “?max-results=3” after the RSS feed URL

e.g. http://billyfung2010.blogspot.com/feeds/posts/default?max-results=3

The issue have been fixed.

Reference:

https://www.youtube.com/watch?v=NFPZJWaGuNI

To resolve the RSS feed exceeds 512KB Size Limit