Filipe, "Free" is usually very small in a system that has been running for a while as memory pages are put to good use by the operating system. "Available" includes most of "Cached". What happens is that the operating system will cache files in unused memory to increase performance, in case they need to be read again. If more memory is needed for processes, the pages from "Cached" will immediately be used.
It looks like your system is using less than 3 GB memory for processes (Total - Available). You have used JRE settings to constrain Java to use less than 1300 MB internally (-Xmx1024m plus -XX:MaxPermSize=256m) plus whatever native memory is used by the JRE (executable image, native stack, and native heap, ...). There are probably about 1.5 GB of other programs running including the operating system. This looks fine to me. Was there something there you did not expect? What is the size of the JRE process? Do you want to make it bigger? If you use Java x64, you can increase the memory used by Java to about 4 GB (depending on how much is needed for other processes). Note also that Java 8 no longer has a PermGen. Kind regards, Ben. On 11/03/16 23:48, Filipe wrote: > Hello. > > I got a question regarding memory usage on a deployed system. > > VirtualMachine, win2008 x64, 4 cpu, 6gb Memory, Java x86, Geoserver 2.5.1 > running inside Tomcat7. > using the following relevant options. > set JAVA_OPTS=%JAVA_OPTS% -server > set JAVA_OPTS=%JAVA_OPTS% -Xms1024m -Xmx1024m -XX:MaxPermSize=256m > -XX:PermSize=128m > set JAVA_OPTS=%JAVA_OPTS% -XX:+UseConcMarkSweepGC -XX:+UseParNewGC > -XX:ParallelGCThreads=4 -XX:NewRatio=2 -XX:+AggressiveOpts > > All is fine but, the memory usage on the machine is as follows: > Physical Memory: > Total: 6143 > Cached: 3296 > Avaliable: 3398 > Free:50 > > My question is regarding the ammount of avaliable memory VS the free. > Why is this happening? is it because of the limit on the x86 java VM ? > > if someone can clarify, it will be most helpfull. > > Regards, > Filipe > > > > -- > View this message in context: > http://osgeo-org.1560.x6.nabble.com/x86-Java-Memory-usage-tp5255808.html > Sent from the GeoServer - User mailing list archive at Nabble.com. > > ------------------------------------------------------------------------------ > Transform Data into Opportunity. > Accelerate data analysis in your applications with > Intel Data Analytics Acceleration Library. > Click to learn more. > http://pubads.g.doubleclick.net/gampad/clk?id=278785111&iu=/4140 > _______________________________________________ > Geoserver-users mailing list > Geoserver-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/geoserver-users > -- Ben Caradoc-Davies <b...@transient.nz> Director Transient Software Limited <http://transient.nz/> New Zealand ------------------------------------------------------------------------------ Transform Data into Opportunity. Accelerate data analysis in your applications with Intel Data Analytics Acceleration Library. Click to learn more. http://pubads.g.doubleclick.net/gampad/clk?id=278785111&iu=/4140 _______________________________________________ Geoserver-users mailing list Geoserver-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geoserver-users
