Passenger Memory Consumes 99% Memory

[Ivan Gonzales]

Hi,

Any way to solve this issue? Passenger process consumes really high memory usage, it is increasing from time to time until it reached 99% taking our application to be unresponsive. 

We need to restart the apache to refresh the memory usage. 

Using Passenger version 5.1.6, Ruby 2.3.1, Rails4, Apache2, 24GB Ram with 12Cores, Ubuntu 14.04. with Sidekiq as worker

```

ID Owner Size Command

11141 root 6.20 GB Passenger core

11414 ucc 4.61 GB Passenger RubyApp: /home/ucc/c1-prod/cumulusone_rc

11421 ucc 3.80 GB Passenger RubyApp: /home/ucc/c1-prod/cumulusone_rc

11428 ucc 2.93 GB Passenger RubyApp: /home/ucc/c1-prod/cumulusone_rc

11435 ucc 2.05 GB Passenger RubyApp: /home/ucc/c1-prod/cumulusone_rc

11442 ucc 1.36 GB Passenger RubyApp: /home/ucc/c1-prod/cumulusone_rc

11449 ucc 943.81 MB Passenger RubyApp: /home/ucc/c1-prod/cumulusone_rc

1147 mysql 793.82 MB /usr/sbin/mysqld

```

Some random passenger-memory-stats.

We are also trying some passenger configs like setting the PassengerMinInstance and PassengerMaxPoolSize but no luck.

See also the attached image, you can see that our server hits almost 100% :(

Thank You,

Ivan Gonzales

[Daniel Knoppel]

Your application processes ("Passenger RubyApp") are using a lot of memory, not Passenger. You can use passenger-memory-stats to inspect usage. Passenger can help work around memory leaks in apps with the following options:

https://www.phusionpassenger.com/library/config/nginx/reference/#passenger_memory_limit 

https://www.phusionpassenger.com/library/config/nginx/reference/#passenger_max_requests

- Daniel

[Ivan Gonzales]

Okay, but one question, will that be an issue if my passenger ruby is set to this?

  PassengerDefaultRuby /usr/bin/passenger_free_ruby

and as i get the ruby version for passenger_free_ruby, it is ruby 2.4.0p0 (2016-12-24 revision 57164) [x86_64-linux]

but i expect my app to use the ruby-2.3.1 installed from my RVM

Thanks again

[Ivan Gonzales]

Then, i am expecting that the memory usage will go down for few minutes the app is on idle state, but why it is not?

[Daniel Knoppel]

Memory usage won't go down if the memory use is due to your app leaking memory. Leaked memory is only freed when the application process exits or is killed, which is exactly what you can ask Passenger to do for you using the links I sent you.

- Daniel

[Ivan Gonzales]

Thanks for this information :)

Will look and observe if Sidekiq causes the memory leak