Re: Java VM memory
>>Hi, >> >>I am using the Tomcat server. If the tomcat server is started 64 Mb of >>memory is allocated (which seems to be default). I use an upload jsp file >>through which I will be able to upload big files (perhaps 100Mb or more). I >>changed the tomcat.bat file by adding the java -Xmx100m piece (which should >>allocate 100Mb of memory for the jvm). But this is not working. I am getting >>an OutOfMemory error when I am uploading a file which is bigger than 50 Mb. >> > >I believe that the JVM *is* working as expected. The problem is working >with a single object that's larger than 50% of the free space in the heap. >This will make some garbage collectors very unhappy, when they need to >move stuff around. You may succeed using a different JVM or even bigger >-mx, but you should really change your code -- loading a 50-megger to >memory in a single chunk is insane (for a single upload, anyway). > Instead of loading the entire file into memory, or uploading it in pieces, you might want to try streaming the file directly to your hard drive. Jason B. === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
Re: Java VM memory
Hi Leon, - Original Message - From: "Leon Daanen" <[EMAIL PROTECTED]> > I am using the Tomcat server. If the tomcat server is started 64 Mb of > memory is allocated (which seems to be default). I use an upload jsp file > through which I will be able to upload big files (perhaps 100Mb or more). I > changed the tomcat.bat file by adding the java -Xmx100m piece (which should > allocate 100Mb of memory for the jvm). But this is not working. I am getting > an OutOfMemory error when I am uploading a file which is bigger than 50 Mb. I believe that the JVM *is* working as expected. The problem is working with a single object that's larger than 50% of the free space in the heap. This will make some garbage collectors very unhappy, when they need to move stuff around. You may succeed using a different JVM or even bigger -mx, but you should really change your code -- loading a 50-megger to memory in a single chunk is insane (for a single upload, anyway). > Below the piece of the tomcat.bat file where the jvm is started and should > allocate 100Mb for the java virtual machine. > > :startServer > echo Starting tomcat in new window > echo Using classpath: %CLASSPATH% > start java -Xmx100m -Dtomcat.home=%TOMCAT_HOME% > org.apache.tomcat.startup.Tomcat %2 %3 %4 %5 %6 %7 %8 %9 > goto cleanup > > > Can anybody tell me what I am doing wrong. > > Thank in advance, > > Leon > > --- > name: Leon Daanen > E-mail: [EMAIL PROTECTED] > Tel.: +31 77 359 5172 > Fax.: +31 77 359 5337 > Location: 3G20 > > Oce Technologies B.V. > www:http://www.oce.com > Tel.: +31 77 359 > P.O. Box 101 > 5900 MA Venlo > The Netherlands > --- > Opinions and views expressed in this message > are my own, they do not necessarily represent > those of Océ > --- > > === > To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". > Some relevant FAQs on JSP/Servlets can be found at: > > http://java.sun.com/products/jsp/faq.html > http://www.esperanto.org.nz/jsp/jspfaq.html > http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP > http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets > === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". Some relevant FAQs on JSP/Servlets can be found at: http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.html http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
