[Heroku] This website is under heavy load

[Marcelo Cajueiro]

Hey guys,

I have a rails application in heroku and I am getting a lot of "This website is under heavy load".

I want to render a different page instead of the default error.

https://www.phusionpassenger.com/documentation/Users%20guide%20Nginx.html#PassengerMaxRequestTime

I tried to add a "public/error503.html" but the error still the same.

Do you know what I can do?

Thanks!

[Hongli Lai]

Are you sure you posted the right link? I get the feeling that you
wanted to link to 'passenger_intercept_errors' but you linked to
'passenger_max_request_time' instead.

How does your config file look like?

Also, which Passenger version are you using?

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[Marcelo Cajueiro]

I think that the error that I quoted is 'passenger_max_request_time'. Am I wrong?

I'm using passenger 5.0.4 and the config is only:

passenger start -p $PORT --max-pool-size $WEB_CONCURRENCY --min-instances $WEB_CONCURRENCY --no-friendly-error-pages

Those configurations are kind of obscure to heroku.

[Hongli Lai]

You should be looking at 'passenger_max_request_queue_size'. There is
even a configuration example there that tells you how to configure an
error page. 'passenger_max_request_time' is totally unrelated.

You should use the advanced configuration mechanism to set these
configurations:
https://www.phusionpassenger.com/documentation/Users%20guide%20Standalone.html#advanced_configuration

On Thu, Apr 23, 2015 at 2:07 PM, Marcelo Cajueiro

[Daniel Knoppel]

By the way, you should consider upgrading to passenger 5.0.6, as it has some important fixes (at least one could trigger a "heavy load" problem).

You can also hold on for 5.0.7, we expect it to be out soon.

- Daniel