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Operating Systems Linux Linux Server free memory decreases Post 302269636 by siba.s.nayak on Thursday 18th of December 2008 06:31:17 AM
Old 12-18-2008
Quote:
Originally Posted by Konerak
Cache memory is just some nix-trix: instead of "not using" memory your system doesn't need, it will use the memory to "cache data". When an application requests more memory, the kernel will free the cache if needed though, so don't worry, memory used by the cache is actually "available" for your programs.

Your java thing seems indeed to be using 2Gb of memory.. not much more I can say of that. If the java thing grows, then it's probably your java code. If the java thing always uses the same amount of memory, and something else grows, it's something else :')
As you said when an application requests for more memory the kernel will release the cached memory but I have seen the case where one Java process needs 2gb memory and around 12gb of heap space got cached and at the same time it is showing around 25mb of free space and application throws java.lang.OutOfMemoryError: Java heap space.

Can you please describe it bit more elaborately?

And also let me know how can be the cached memory release and get used during the execution of process?
 

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rmiregistry(1)						      General Commands Manual						    rmiregistry(1)

NAME
rmiregistry - Java remote object registry SYNOPSIS
rmiregistry [ port ] DESCRIPTION
The rmiregistry command creates and starts a remote object registry on the specified port on the current host. If port number is omitted, the registry is started on port 1099. The rmiregistry command produces no output and is typically run in the background. For example: example% rmiregistry & A remote object registry is a bootstrap naming service that is used by RMI servers on a host to bind remote objects to names. Clients can then look up remote objects and make remote method invocations. The registry is typically used to locate the first remote object on which an application needs to invoke methods. That object in turn pro- vides application-specific support for finding other objects. The methods of the java.rmi.registry.LocateRegistry class are used to get a registry operating on a particular host or host and port. The URL-based methods of the java.rmi.Naming class operate on a registry and can be used to look up a remote object, bind a simple (string) name to a remote object, rebind a new name to a remote object (overriding the old binding), unbind a remote object, and list the URLs bound in the registry. OPTIONS
The following option is supported: -Joption Used in conjunction with any java option, this option passes option (no spaces between -J and option) on to the java inter- preter. SEE ALSO
See (or search java.sun.com) for the following: java.rmi.Naming @ http://java.sun.com/j2se/1.5/docs/api/java/rmi/Naming.html java.rmi.registry.LocateRegistry @ http://java.sun.com/j2se/1.5/docs/api/java/rmi/registry/LocateRegistry.html 23 Apr 2001 rmiregistry(1)
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