java - The load in some Google App Engine instances and very small in others. Why? -

as can see in following snapshot load in of dynamic instances huge (more 20k requests) while in other small.

why happening? shouldn't gae distribute uniformly load??

if load balanced across active dynamic instances they'd become idle (only when entire app's traffic drop nothing) it'd difficult dynamically shut them down.

more info here:

• https://cloud.google.com/appengine/docs/scaling#scaling_dynamic_instances
• https://cloud.google.com/appengine/docs/managing-resources#instances