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check system memory available  RSS feed

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I know how to find out how much memory the Java Runtime has, but is there a way to check how much the OS has? Windows is reporting this error associated with Tomcat:

The CreateThread function failed for the following reason: Not enough storage is available to process this command.

We've got about 3GB of RAM in the Wintel machine and 1.5GB is allocated to Java. I'd like to just have a simple lightweight watchdog program running that's checking the OS's memory usage very frequently, and logs it to a file anytime it gets super high so that I can know for sure that we have a problem with this! If there's no way to do it, I guess I can try to figure out how to hack out a little C# program for this. Or should I not be asking about system memory and really only be concerned with checking the JVM used by the Tomcat process?

Thanks for any tips!
Don't get me started about those stupid light bulbs.
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