[cfaussie] Re: ColdFusion 9 Server Memory Issues
Hi Sean, I notice Java 7 is due for release at end of July. With java 7 you get the released version of UseG1GC garbage collector - rather than experimental option in java 6. Cheers, Carl. Yeah, on 32-bit Windows, 1.4GB is the most you can give it. I pretty much never run CF in production with less than a 2GB heap (usually 2GB min, 3GB max) but of course I don't use Windows in production. On 64-bit servers you can go higher but if you go beyond 4GB, you need to be very careful about the GC configuration you use... Even tho' it's only experimental in Java 6, if you use a large heap, the G1 collector is worth trying (but, as always, it's all about load testing / real live load and constantly tuning the GC configuration to get the best overall performance). -- Sean A Corfield -- (904) 302-SEAN An Architect's View --http://corfield.org/ World Singles, LLC. --http://worldsingles.com/ Railo Technologies, Inc. --http://www.getrailo.com/ Perfection is the enemy of the good. -- Gustave Flaubert, French realist novelist (1821-1880) -- You received this message because you are subscribed to the Google Groups cfaussie group. To post to this group, send email to cfaussie@googlegroups.com. To unsubscribe from this group, send email to cfaussie+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/cfaussie?hl=en.
Re: [cfaussie] Re: ColdFusion 9 Server Memory Issues
On Tue, Jul 12, 2011 at 11:08 PM, Carl ca...@tassweb.com.au wrote: I notice Java 7 is due for release at end of July. With java 7 you get the released version of UseG1GC garbage collector - rather than experimental option in java 6. Yup. but I don't know how quickly (or even if) Adobe will certify ColdFusion on Java 7... -- Sean A Corfield -- (904) 302-SEAN An Architect's View -- http://corfield.org/ World Singles, LLC. -- http://worldsingles.com/ Railo Technologies, Inc. -- http://www.getrailo.com/ Perfection is the enemy of the good. -- Gustave Flaubert, French realist novelist (1821-1880) -- You received this message because you are subscribed to the Google Groups cfaussie group. To post to this group, send email to cfaussie@googlegroups.com. To unsubscribe from this group, send email to cfaussie+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/cfaussie?hl=en.
Re: [cfaussie] Re: ColdFusion 9 Server Memory Issues
FWIW - tried the G1 collector on Java 6 (_16 release iirc) for a large deployment on Win64/CF 8 for a while and had regular fatal JVM crashes. I'm pretty sure it has improved in later versions, but everyone be aware, that the G1 collector in Java 6 is _really_ experimental and it's not just a label Oracle sticked on to it :) Hi Sean, I notice Java 7 is due for release at end of July. With java 7 you get the released version of UseG1GC garbage collector - rather than experimental option in java 6. Cheers, Carl. Yeah, on 32-bit Windows, 1.4GB is the most you can give it. I pretty much never run CF in production with less than a 2GB heap (usually 2GB min, 3GB max) but of course I don't use Windows in production. On 64-bit servers you can go higher but if you go beyond 4GB, you need to be very careful about the GC configuration you use... Even tho' it's only experimental in Java 6, if you use a large heap, the G1 collector is worth trying (but, as always, it's all about load testing / real live load and constantly tuning the GC configuration to get the best overall performance). -- You received this message because you are subscribed to the Google Groups cfaussie group. To post to this group, send email to cfaussie@googlegroups.com. To unsubscribe from this group, send email to cfaussie+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/cfaussie?hl=en.
Re: [cfaussie] Re: ColdFusion 9 Server Memory Issues
On Wed, Jul 13, 2011 at 4:40 AM, Kai Koenig k...@koeni.de wrote: FWIW - tried the G1 collector on Java 6 (_16 release iirc) for a large deployment on Win64/CF 8 for a while and had regular fatal JVM crashes. I'm pretty sure it has improved in later versions, but everyone be aware, that the G1 collector in Java 6 is _really_ experimental and it's not just a label Oracle sticked on to it :) It was only introduced in _14 I believe and most folks says it was pretty unstable up to about _20. I've seen good reports of folks using it with _22 and up. -- Sean A Corfield -- (904) 302-SEAN An Architect's View -- http://corfield.org/ World Singles, LLC. -- http://worldsingles.com/ Railo Technologies, Inc. -- http://www.getrailo.com/ Perfection is the enemy of the good. -- Gustave Flaubert, French realist novelist (1821-1880) -- You received this message because you are subscribed to the Google Groups cfaussie group. To post to this group, send email to cfaussie@googlegroups.com. To unsubscribe from this group, send email to cfaussie+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/cfaussie?hl=en.
[cfaussie] Re: ColdFusion 9 Server Memory Issues
On Jul 14, 11:40 am, Sean Corfield seancorfi...@gmail.com wrote: On Wed, Jul 13, 2011 at 4:40 AM, Kai Koenig k...@koeni.de wrote: FWIW - tried the G1 collector on Java 6 (_16 release iirc) for a large deployment on Win64/CF 8 for a while and had regular fatal JVM crashes. I'm pretty sure it has improved in later versions, but everyone be aware, that the G1 collector in Java 6 is _really_ experimental and it's not just a label Oracle sticked on to it :) It was only introduced in _14 I believe and most folks says it was pretty unstable up to about _20. I've seen good reports of folks using it with _22 and up. -- I have been running on a dev system CF9.0.1 with Java 7 preview version 21.0-b17. So far am impressed, particularly using G1. Tho Java 7 being preview it has not been near more vital / loaded CF environments – so early days. For those interested readers a very brief recap on garbage collection. The Java heap is divided into 3 regions: young, tenured/old, and perm. You may also know that young is further divided into eden and two survivor spaces. A minor garbage collection finds all live objects and puts them to one of the survivor spaces. Longer survived objects will eventually move into tenured/old space. Some special objects land in Perm. From what I have gathered the G1 collector memory is divided into multiple regions. Each of these regions will participate in a generation. Some will be young, some to survivor, and others to old. The collector is parallelized (multi-threaded) and will work concurrently with your application (low pause). The minor collection is similar to as current. There is a change to collection of regions that are tenured/old space, there will be no separate collector. Regards, Carl. -- You received this message because you are subscribed to the Google Groups cfaussie group. To post to this group, send email to cfaussie@googlegroups.com. To unsubscribe from this group, send email to cfaussie+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/cfaussie?hl=en.
[cfaussie] Re: ColdFusion 9 Server Memory Issues
Hi Steve, How much RAM is installed on your Windows server? Is Windows CF 32 or 64 bit? Less than 500Mb RAM used by Jrun on a server installed with 4Gb RAM would seem reasonable to me. Regards, Carl. On Jul 13, 2:14 pm, Steve Onnis st...@cfcentral.com.au wrote: Has anyone had any issues with CF9 and memory? I have this strange problem where it does not seem to be giving it enough. Looking at the windows task mananger the jrun.exe process seems to not want to go over 300,000-400,000 K -- You received this message because you are subscribed to the Google Groups cfaussie group. To post to this group, send email to cfaussie@googlegroups.com. To unsubscribe from this group, send email to cfaussie+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/cfaussie?hl=en.
RE: [cfaussie] Re: ColdFusion 9 Server Memory Issues
32 Bit WIN2003 4GB ram, 1GB assigned to CF as thats all i can give it -Original Message- From: Carl [mailto:ca...@tassweb.com.au] Sent: Wednesday, 13 July 2011 2:38 PM To: cfaussie Subject: [cfaussie] Re: ColdFusion 9 Server Memory Issues Hi Steve, How much RAM is installed on your Windows server? Is Windows CF 32 or 64 bit? Less than 500Mb RAM used by Jrun on a server installed with 4Gb RAM would seem reasonable to me. Regards, Carl. On Jul 13, 2:14 pm, Steve Onnis st...@cfcentral.com.au wrote: Has anyone had any issues with CF9 and memory? I have this strange problem where it does not seem to be giving it enough. Looking at the windows task mananger the jrun.exe process seems to not want to go over 300,000-400,000 K -- You received this message because you are subscribed to the Google Groups cfaussie group. To post to this group, send email to cfaussie@googlegroups.com. To unsubscribe from this group, send email to cfaussie+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/cfaussie?hl=en. -- You received this message because you are subscribed to the Google Groups cfaussie group. To post to this group, send email to cfaussie@googlegroups.com. To unsubscribe from this group, send email to cfaussie+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/cfaussie?hl=en.
Re: [cfaussie] Re: ColdFusion 9 Server Memory Issues
On Tue, Jul 12, 2011 at 10:27 PM, Steve Onnis st...@cfcentral.com.au wrote: 32 Bit WIN2003 4GB ram, 1GB assigned to CF as thats all i can give it Yeah, on 32-bit Windows, 1.4GB is the most you can give it. I pretty much never run CF in production with less than a 2GB heap (usually 2GB min, 3GB max) but of course I don't use Windows in production. On 64-bit servers you can go higher but if you go beyond 4GB, you need to be very careful about the GC configuration you use... Even tho' it's only experimental in Java 6, if you use a large heap, the G1 collector is worth trying (but, as always, it's all about load testing / real live load and constantly tuning the GC configuration to get the best overall performance). -- Sean A Corfield -- (904) 302-SEAN An Architect's View -- http://corfield.org/ World Singles, LLC. -- http://worldsingles.com/ Railo Technologies, Inc. -- http://www.getrailo.com/ Perfection is the enemy of the good. -- Gustave Flaubert, French realist novelist (1821-1880) -- You received this message because you are subscribed to the Google Groups cfaussie group. To post to this group, send email to cfaussie@googlegroups.com. To unsubscribe from this group, send email to cfaussie+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/cfaussie?hl=en.
[cfaussie] Re: ColdFusion 9 Server Memory Issues
Sorry Steve like to help but what is the problem when CF9 takes less than half of what you allocated? Would seem to me not enough memory is been taken or it simply does not need to grow memory wise up to the maximum. Perhaps this is the issue - it is growing to less than half of 1Gb and your getting out of memory errors? On 32 bit you are close to right in saying you can only set the limit to 1Gb total. In reality it is a bit more 1.3 - 1.4Gb depending on some variables. Cheers, Carl. On Jul 13, 3:27 pm, Steve Onnis st...@cfcentral.com.au wrote: 32 Bit WIN2003 4GB ram, 1GB assigned to CF as thats all i can give it -- You received this message because you are subscribed to the Google Groups cfaussie group. To post to this group, send email to cfaussie@googlegroups.com. To unsubscribe from this group, send email to cfaussie+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/cfaussie?hl=en.
