Mmmm, I need to read to emails more closely... :) This collector CAN be used on multiple CPU machines and just to quote the Sun JVM docs (as I can't be botherd rehashing it myself)
"Use the concurrent low pause collector if your application would benefit from shorter garbage collector pauses and can afford to share processor resources with the garbage collector when the application is running. Typically applications which have a relatively large set of long-lived data (a large tenured generation), and run on machines with two or more processors tend to benefit from the use of this collector. However, this collector should be considered for any application with a low pause time requirement. Optimal results have been observed for interactive applications with tenured generations of a modest size on a single processor." Andy On 4/15/05, Andy Allan <[EMAIL PROTECTED]> wrote: > -XX:+UseConcMarkSweep can be used successfully on single CPU machines. > > This collector cleans up the tenured generation in parallel with the > execution of the application but it doesn't actually require multiple > CPUs (although it will of course benefit from 2+ CPUs) > > Andy > > On 4/15/05, Robertson-Ravo, Neil (RX) > <[EMAIL PROTECTED]> wrote: > > This -XX:+UseConcMarkSweepGC should not be used on a dual processor box. You > > can remove it altogether to get better 0performance. > > > > > > -----Original Message----- > > From: Dov Katz [mailto:[EMAIL PROTECTED] > > Sent: 15 April 2005 02:53 > > To: CF-Talk > > Subject: sorry, back to JVM/GC for a moment > > > > Final sanity check. Please advise if I should change anything. (w2k server > > 2 1ghz proc with 1gb ram - sharing sql on same box) > > > > I have the following JVM setting, after I modified it last week. Things seem > > good, but what else should I be looking to optimize things? What might be > > wrong/inefficient here? Thanks > > -dov > > > > -server -DJINTEGRA_NATIVE_MODE -DJINTEGRA_PREFETCH_ENUMS -Xms256m -Xmx512m > > -Dsun.io.useCanonCaches=false > > -Xbootclasspath/a:"{application.home}/../lib/webchartsJava2D.jar" > > -XX:MaxPermSize=128m -XX:PermSize=64m -XX:NewSize=64m > > -XX:+UseConcMarkSweepGC > > -Djavax.xml.parsers.SAXParserFactory=com.macromedia.crimson.jaxp.SAXParserFa > > ctoryImpl > > -Djavax.xml.parsers.DocumentBuilderFactory=com.macromedia.crimson.jaxp.Docum > > entBuilderFactoryImpl > > > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Find out how CFTicket can increase your company's customer support efficiency by 100% http://www.houseoffusion.com/banners/view.cfm?bannerid=49 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:203005 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
