Memory leak in Passenger ?

[Michael Wörz]

Hello,

in the past months we are observing raising memory usage on our puppet server and we have to restart it once a week when it starts swapping.

Mainly there are 5 Passenger processes that are running for days and using about 15-20% of memory each. 

System has 4 GB of memory and is serving about 1600 Clients.

-> rpm -qa | grep  passenger

ruby193-rubygem-passenger-native-libs-4.0.18-9.8.el6.x86_64

rubygem-passenger-native-libs-4.0.18-9.8.el6.x86_64

mod_passenger-4.0.18-9.8.el6.x86_64

rubygem-passenger-4.0.18-9.8.el6.x86_64

rubygem-passenger-native-4.0.18-9.8.el6.x86_64

ruby193-rubygem-passenger-native-4.0.18-9.8.el6.x86_64

ruby193-rubygem-passenger-4.0.18-9.8.el6.x86_64

-> cat /etc/redhat-release

CentOS release 6.6 (Final)

-> rpm -qa | grep  puppet

puppet-server-3.8.1-1.el6.noarch

[Josh Cooper]

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You might take a look through the passenger issue tracker and release notes to see if there are any known memory leaks, maybe https://github.com/phusion/passenger/issues/1278?

Josh

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Josh Cooper

Developer, Puppet Labs

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[Ramin K]

There were some reports of memory growth in Puppet masters starting with
late 3.6 and definitely in 3.7. I don't recall if a ticket was ever
generated.

One workaround is a to set PassengerMaxRequests = 10000 so that your
Puppet master processes are recycled sooner. This should keep RAM usage
below 200-250MB per process.

Ramin

[Michael Wörz]

>> set PassengerMaxRequests = 10000

thanks, this seems to help. memory usage was constant last 3 days.