Using https://play.dgraph.io/ some predicates doesn't shows Sample data or Stats and had UI breaks

[MichelDiz]

I have not tested all predicates, but many have given this problem.

It happens with:

art_director.films_art_directed
casting_director.films_casting_directed
collections
company_role_or_service.companies_performing_this_role_or_service
content_rating.country
content_rating.rating_system
content_rating_system.jurisdiction
content_rating_system.ratings
costume_design_by
costumer_designer.costume_design_for_film
crewmember.films_crewed
director.film
distribution_medium.films_distributed_in_this_medium
distributors
dubbing_performances
editor.film
estimated_budget
executive_produced_by
featured_locations
featured_song
festival.individual_festivals
festival_sponsor.festivals_sponsored
festivals
filming
format
format.format
gross_revenue
all => http://www.w3.org/2000/01/
locations
music_contributor.film
other_crew

Taking too long to complete:

festival_focus.festivals_with_this_focus 
format.format
name
performance.actor

Breaks the UI:
loc

[paulftw]

Root cause is play.dgraph.io gets unreliable and slow when a big query is run.
After some idle time or a reboot it becomes responsive again.
Right now all predicates I've tested show stats after less than 5 second delay.

loc is a different problem. Investigating.

[paulftw]

Fixed the loc issue, nothing I can do about slow loading of statistics. We have to wait until has query is optimized.
Some instability will be removed by adding a query timeout