Nginx & Passenger - failed (11: Resource temporarily unavailable) while connecting to upstream
- by Toby Hede
I have an Nginx and Passenger setup that is proving problematic.
At relatively low loads the server seems to get backed up and start churning results like this into the error.log:
connect() to unix:/passenger_helper_server failed
(11: Resource temporarily unavailable) while connecting to upstream
My passenger setup is:
passenger_min_instances 2;
passenger_pool_idle_time 1200;
passenger_max_pool_size 20;
I have done some digging, and it looks like the CPU gets pegged. Memory usage seems fine passenger_memory_stats shows at most about 700MB being used, but CPU approaches 100%.
is this enough to cause this type of error?
Should i bring the pool size down?
Are there other configuration settings I should be looking at?
Any help appreciated
Other pertinent information:
Amazon EC2 Small Instance
Ubuntu 10.10
Nginx (latest stable)
Passenger (latest stable)
Rails 3.0.4
