topic Swap space being used. in Alfresco Archive

Swap space being used.

eswbitto — Thu, 19 Dec 2013 17:35:07 GMT

Hello Everyone,My alfresco setup is the following:4.2.dCentos 6.4Using httpd for the front end SSLVM on proxmox.Vanilla install with ldap sync.Ok so I have about between 7-8 GB of data in our production server for Alfresco. I have 4 GB or memory with 4GB of swap if it is needed. I only have Alfresco

Re: Swap space being used.

marco_altieri — Thu, 19 Dec 2013 18:02:00 GMT

Hi,

How much memeory have you assigned to Alfresco ?

Re: Swap space being used.

eswbitto — Thu, 19 Dec 2013 18:30:31 GMT

I haven't configured anything specifically. The VM has 4 GB of memory and if that fills up then swap gets used. If your referring to anything specific in alfresco-global.properties or other files. There's nothing setup.

Re: Swap space being used.

rjohnson — Thu, 19 Dec 2013 18:35:26 GMT

To clear this I assume you restart your server. How long does it take after the restart for these messages to appear? I ask because we have a similar issue which I belive to be caused by OpenOffice. I believe this because a restart of Tomcat and PostgreSQL does not free the swap, but retarting the server does and like you we have nothing but Alfresco on that server.

Re: Swap space being used.

eswbitto — Thu, 19 Dec 2013 18:46:56 GMT

Well the weird thing is that this happened at 6 in the evening. When I came in the next day only about 30% of the memory was being used and swap wasn't being used at all. This has only happened one time so a reboot of the server hasn't been needed. I might try your suggestion after office hours to see if that does anything. Still though it's a mystery of why the memory is filling up.

I thought that maybe a user had imported a large amount of files, (none of the users have capacity restrictions) but that wasn't the case.

Re: Swap space being used.

eswbitto — Thu, 19 Dec 2013 20:59:39 GMT

So I did some further digging. Turns out at 6:00 pm everyday the amount of Free Space in memory spikes while swap spikes for usage. Looking at the graphs they are almost identical. Does Alfresco have a built in function to do some type of maintenance at 6:00 pm?

Re: Swap space being used.

rjohnson — Fri, 20 Dec 2013 08:17:20 GMT

The only scehduled jobs I know of are the index backup and the removal of completely deleted items from the repo file system to contentstore.deleted, but these are scheduled at 03:00 and 04:00 respectively by default.

Re: Swap space being used.

eswbitto — Mon, 06 Jan 2014 19:41:43 GMT

@rjohnson

Have you looked into changing the catalina.sh or ctl.sh for the Java options to increase them? I've done some googling and want to get your insight before I start making changes.

Re: Swap space being used.

sharifu — Tue, 07 Jan 2014 13:02:25 GMT

@ESWBitto try the following in ctl.sh


 export JAVA_OPTS="-server -Xms2G -Xmx3G -XX:MaxPermSize=512M -Xss1024k -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:CMSInitiatingOccupancyFraction=80 -XX:NewSize=1G -Dalfresco.home=/opt/alfresco-4.2.d -Dcom.sun.management.jmxremote=true -Djava.rmi.server.hostname=172.16.0.21 -Dsun.security.ssl.allowUnsafeRenegotiation=true"
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