java google-app-engine development-environment production-environment

GAE/J : Development and Production Environment

What are GAE/J key differences between development and production environments.

What should be rechecked at production?
What kind of datastore differences should I expect?

Solution

Development environment is single threaded
No request timeout
No exploding index, infact dev env does not use indexes at all for queries
No async URLFetch
No async Datastore
Obviously no request statistics / log searching interface
No wait time for index building
No datastore timeouts
No reduced capabilities