topic Re: Disable L2 cache in Alfresco Archive

Disable L2 cache

jsb — Fri, 07 Oct 2016 18:07:38 GMT

We have migrated our Alfresco instance (3.4.11 Enterprise) into AWS. The EhCache automatic discovery is failing since AWS does not support multicast. To fix this I changed the ehcache-context.xml file to use manual discovery (default was automatic discovery). This works just as well as the automatic

Re: Disable L2 cache

kaynezhang — Sat, 08 Oct 2016 02:57:26 GMT

Try to add this JVM parameter to your app. server:

-Dnet.sf.ehcache.disabled=true

But I'm not sure whether it will cause any errors,you should give it a test.

Re: Disable L2 cache

afaust — Sat, 08 Oct 2016 08:10:24 GMT

Are you an active Alfresco Enterprise customer? If so, you should also consider contacting Support with that question. Of course they will very likely tell you to upgrade to a newer Alfresco version as 3.4.x is quite old and no longer fully supported. There also has been quite a bit of change in the clustering area with Hazelcast now being used for clustering and discovery. Though that too has some issues, overall the cluster stability was improved greatly with the switch to Hazelcast-based clustering.

Re: Disable L2 cache

jsb — Tue, 11 Oct 2016 16:11:03 GMT

Thank you for the reply. Support was not able to help much with the 3.4 version. We know that upgrading would fix a lot of small issues and probably help with performance. Hopefully that will come soon.

Re: Disable L2 cache

jsb — Wed, 12 Oct 2016 10:44:40 GMT

This didn't seem to help, but thank you for pointing it out. I am still investigating why it isn't working, because it seems like exactly what I want.

Re: Disable L2 cache

kaynezhang — Wed, 12 Oct 2016 14:16:24 GMT

I don't have source code for version 3.4 ,maybe you can try to set the following properties to true in the alfresco-global.properties :

system.cache.disableMutableSharedCaches=true

system.cache.disableImmutableSharedCaches=true

It works for 4.0,maybe it will also work for 3.4 you can give it a try.

Re: Disable L2 cache

jsb — Wed, 12 Oct 2016 15:33:13 GMT

Well that did seem to disable caching, but it made the servers just as slow as when there is a server down in the list.

But I guess I'll mark this as the correct answer since it did answer the question...

Re: Disable L2 cache

jsb — Wed, 12 Oct 2016 15:34:46 GMT

We ended up just moving forward with this 'as is'. We'll just fix the config file whenever the issue occurs, which is rarely.

Also, I made a mistake in my original post, this only happens when a server is down, not when tomcat is down.

Thank you for your help everyone.