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Passenger is killing my server

Added by Don Sefer over 9 years ago

hi,

I have a big problem with Passenger. I am running a vserver with 1gig ram and 1gig burst, some kind of cpu :)
I installed via my following guide here: https://community.openproject.org/topics/4192

I am limited to 128 numprocs (processes/threats) and everytime I access OpenProject or doing some task like trying to synchronize with taskconnector, its overkilling my server.

There will be several “Passenger RubyApp: /openproject”, AppPreloader, PassengerAgent Server and other tasks/threats. Way too much I think.
Is it possible to limit this somehow? It is a single user trying to load the site and thats enough for the server :-(


Replies (3)

RE: Passenger is killing my server - Added by Jonas Heinrich (Finn) over 9 years ago

Hi Don,

what could work is if you limit the pool size, i.e. set PassengerMaxPoolSize to 1 or 2 in apache2.conf. Hopefully, I will find more time tomorrow to test this.

What is the number of your processes (ps aux | wc -l)?

Best,

Jonas

RE: Passenger is killing my server - Added by Jonas Heinrich (Finn) over 9 years ago

Hi Don,

on an ubuntu system I had the following numbers of processes:

  • directly after restart of apache: 91
  • with no pool size set, after one request: 98
  • with pool size = 2, after one request: 94
  • with pool size = 1, after one request: 93 (shortly 94)

So I think limiting this setting is the only thing to decrease the number of processes. But there is only a small change. If that is not enough we would have to look at the concurrency settings of apache itself.

By the way, I think I was wrong before. The setting should not go into apache.conf but much rather in mods-available/passenger.conf like this

<IfModule mod_passenger.c>
  PassengerMaxPoolSize 1
  PassengerRoot /home/vagrant/.rbenv/versions/2.1.5/lib/ruby/gems/2.1.0/gems/passenger-5.0.4
  PassengerDefaultRuby /home/vagrant/.rbenv/versions/2.1.5/bin/ruby
  RailsEnv development
</IfModule>

Best,

Jonas

RE: Passenger is killing my server - Added by Don Sefer over 9 years ago

Hi,
htop says:
tasks: 32
threads: 68
ps aux: 38

One user access:
ps aux: 39
tasks: 35
threads: 81

I am using nginx, not apache. So unfortunately this conf won’t help me :(

When accessing timeline, the first time everything is alright. second time memory overload and nothing works anymore…

Guess I have to change servers ASAP… Only problem is I need a full backup for this.

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