topic Re: Installing Alfresco 3.3 Community Edition on ubuntu in Alfresco Archive

Installing Alfresco 3.3 Community Edition on ubuntu

mijelh — Wed, 21 Apr 2010 14:05:42 GMT

I've been struggling to install alfresco 3.3 CE on a test server for a demonstration, without much success.Every time I start Alfresco, after a few clicks the application crashes:tomcat/logs/catalina.2010-04-21.log21-Apr-2010 15:44:28 org.apache.catalina.connector.CoyoteAdapter serviceSEVERE: An exc

Re: Installing Alfresco 3.3 Community Edition on ubuntu

mrogers — Wed, 21 Apr 2010 14:18:56 GMT

You need to increase your MaxPerm setting above 128MB.   Try 150 or 200 if that still gives PermGen errors.

And yes you will struggle to run Alfresco on 1GB of RAM.   You should ideally have enough RAM so that the OS never needs to page java out.

You can detune alfresco by reducing the number of JLAN and index worker threads and possibly by reducing the stack size for each thread.   You may also be able to turn off or disable services that you don't need.

Re: Installing Alfresco 3.3 Community Edition on ubuntu

mijelh — Wed, 21 Apr 2010 15:58:51 GMT

Thanks for the quick reply, it seems to have solved the problem.

However, I have now two questions regarding memory usage:
I don't mid alfresco going slow on my test computer (it's just for testing after all), and memory is cheap, so if I ever use it for production I can just buy more RAM., but:
1) When a PermGem error happen, AFAIK the only solution is to reboot both java and alfresco, so there is a chance that the server get blocked needing a manual restart. Is there any mechanism to prevent this from happening?
2) How fast does memory usage increase with more users/documents? is there any data on this?

Re: Installing Alfresco 3.3 Community Edition on ubuntu

mrogers — Wed, 21 Apr 2010 16:49:24 GMT

1) When a PermGem error happen, AFAIK the only solution is to reboot both java and alfresco, so there is a chance that the server get blocked needing a manual restart. Is there any mechanism to prevent this from happening?
PermGen errors are bad news. But its very unlikely that you will get PermGen errors once Alfresco is up and running. Whether you need to restart depends upon which application server you are using. For example WebSphere and WebLogic will probably allow your to configure memory through their admin consoles.

2) How fast does memory usage increase with more users/documents? is there any data on this?
Yes there's various sources of benchmarking data, but as with all things performance related it depends more
upon what your users are doing. :wink:

http://wiki.alfresco.com/wiki/JVM_Tuning

Re: Installing Alfresco 3.3 Community Edition on ubuntu

mijelh — Thu, 22 Apr 2010 14:59:08 GMT

Everything points to the fact that 1 GB RAM is just not enough for running Alfresco with my current configuration. I think it's ridiculous not to expend those 20€ or so on an additional GB of RAM so that's exactly what I'm doing.

Thank you very much for your help.