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Java Forum / First Aid / May 2008-Xmx---m getting smaller and smaller
Hi, I have Windows XP SP3 with 4GB memory (I know Windows only allows apps to use about 3.25GB.) I have no applications running. I ran System Mechanic 7 to defrag the memory with the result of the largest contiguous block of memory being 2.74GB. However, everytime I started Eclipse 3.3.2, the JRE 1.6.0_04 JVM terminated with a -1 code. I started at -Xmx1024m and continually decremented until I reached -Xmx600m when Eclipse started okay. This morning I was running Eclipse with -Xmx900m okay. The only changes I made were to (1) set the system variable JAVA_HOME to reference JDK 1.6.0_04 and replaced java.exe, javaw.exe, javaws.exe in c: \WINDOW\System32\ with the JRE 1.6.0_04 files. They were 1.4.2_07. Does anyone have any idea why the JVM terminates because of not enough memory when there is more than enough contiguous memory? This is really frustrating. Thank you, Don The question is how many plug-ins do you have installed? You might run out of space to load the classes. BIRT is know to do that to you. >Hi, > [quoted text clipped - 18 lines] >Thank you, >Don  SignatureDaniel @ [www.littletutorials.com] Language is froth on the surface of thought >>Does anyone have any idea why the JVM terminates because of not enough >>memory when there is more than enough contiguous memory? This is really >>frustrating. Does the memory really need to be contiguous under Windows? Why? With paging of memory I didn't even know that such a thing really existed anymore. Page table anyone? SignatureKenneth P. Turvey <kt-usenet@squeakydolphin.com> http://www.electricsenator.net /"\ \ / ASCII RIBBON CAMPAIGN X AGAINST HTML MAIL AND NEWS / \ "Kenneth P. Turvey" <kt-usenet@squeakydolphin.com> wrote in news:48390e15$0 $2953$ec3e2dad@news.usenetmonster.com: >>>Does anyone have any idea why the JVM terminates because of not enough >>>memory when there is more than enough contiguous memory? This is really [quoted text clipped - 5 lines] > > Page table anyone? Yes. Google finds a lot of discussion about this. For years this has been one of the biggest complaints to Sun. BTW - From what I have read, Windows allocates memory to the JVM as more heap space is needed when -Xms and -Xmx are NOT equal. However, when -Xms and - Xmx are equal, Windows will allocate all the memory for the Xmx heap. Thank you, Don > The question is how many plug-ins do you have installed? You might run > out of space to load the classes. BIRT is know to do that to you. [quoted text clipped - 21 lines] >>Thank you, >>Don Thank you for your suggestion. Just the standard plug-ins for basic Eclipse plus emf-sdo-xsd and Subclipse. The JVM terminates immediately before Eclipse can be run. Eclipse.exe starts the JVM and then the Eclipse Java classes run in the JVM. Thank you, Don > Does anyone have any idea why the JVM terminates because of not enough memory > when there is more than enough contiguous memory? This is really > frustrating. This might be obvious but when was the last time you did a full virus and malware scan with a good, up-to-date scanner? >> Does anyone have any idea why the JVM terminates because of not enough >> memory when there is more than enough contiguous memory? This is >> really frustrating. > > This might be obvious but when was the last time you did a full virus > and malware scan with a good, up-to-date scanner? Thank you for your suggestion. I have McAffe AntiVirus with automatic updates. It's always turned on. I do a full deep scan twice a week. Thank you, Don > I started at -Xmx1024m -Xmx10m means set the maximum Java heap size, in megabytes. Java needs a lot more space than just the heap. It needs all its native code, stackspace, disk cache .... SignatureRoedy Green Canadian Mind Products The Java Glossary http://mindprod.com Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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