José: I-ve found another mail about the subject. Sorry for the rest because this one is in spanish.
---> Tengo tambien esto Notese que se hace la comparacion con Linux 2.2(Sun JVM La maquina virtual de sun _es_ lenta. Otra cosa a tomar en cuenta es que se hizo un cambio bastante fuerte en el kernel de linux a partir de la version 2.4.7 si no mal recuerdo. El cambio fue en el manejo de la memoria virtual (VMM) Sobre la version, hay que aclarar algunas cosas (yo me enteré no hace mucho) Hay una version estable del kernel que es liderada por Linus Torvalds, es la que se baja de www.kernel.org. Por otra parte hay parches al kernel que estan disponibles pero no han pasado a la rama de Linus porque él no los ha aprobado. Las distribuciones (RedHat, SuSE, etc) vienen con un kernel distinto a la rama oficial, ellos incorporan los parches que estimen convenientes. Por ejemplo RH7.2 viene con kernel 2.4.7, con soporte de EXT3 y con el antiguo VMM, mientras que el oficial (Linus) version 2.4.7 no tiene soporte para ext3, pero si cuenta con la nueva VMM. Con el asunto de la VMM se produjo una gran discusion y Alan Cox (Kernerl Guru de RedHat) creo su propia rama en donde incorporaba muchos mas parches del kernel, pero con la VMM clasica. En mi "estacion de trabajo" con la distribucion original + las aplicaciones que tenia andando le costaba andar, de repente se notaba harto swap. Despues con las actualizaciones de algunas librerias, y el cambio del kernel al oficial 2.4.17 funcionaba muchisimo mejor todo, en el mismo equipos... despues me subieron a 256MB en RAM y ya no se nota tanto la diferencia. Esto de la nueva VMM es mas o menos reciente (unos 3 o 4 meses atras) -- Franco Catrin L. <[EMAIL PROTECTED]> http://www2.netexplora.cl/ancelot http://defx.sourceforge.net ICQ#:30449379 ----- Original Message ----- From: "josete" <[EMAIL PROTECTED]> To: "Orion-Interest" <[EMAIL PROTECTED]> Sent: Thursday, February 07, 2002 4:58 PM Subject: Re: Orion+Linux under heavy load > Wich problem do you say they've fixed? threads under linux? i've done some > tests with a redhat 6.2.(sorry i can't remember exactly the kernel version) > and jboss, and only at start time it was about three times slower than the > same jboss in a windows 2000. > If with the new kernel versions it runs more efficiently, it would be great > because i'm a linux fan that has been forced to use windows by this > problem... XD > > ----- Original Message ----- > From: "Jorge Jimenez C" <[EMAIL PROTECTED]> > To: "Orion-Interest" <[EMAIL PROTECTED]> > Sent: Thursday, February 07, 2002 3:29 PM > Subject: Re: Orion+Linux under heavy load > > > > Don't worry. That problem is already fixed in the latest linux kernel > > releases. I don't remember exactly release number but you can easily find > > it. I've made some tests with JBoss and it runs very well. > > > > JJ > > > > ----- Original Message ----- > > From: "Peter Peltonen" <[EMAIL PROTECTED]> > > To: "Orion-Interest" <[EMAIL PROTECTED]> > > Sent: Thursday, February 07, 2002 7:57 AM > > Subject: Orion+Linux under heavy load > > > > > > > > > > When browsing through JBoss's documentation I found this remark: > > > > > > http://www.jboss.org/online-manual/HTML/ch11s02.html > > > --<snip>-- > > > Be aware however that JBoss performance is very dependant on the > > > underlying configuration. For example, informal tests show that on the > > > same PC box, it can run twice as fast under Windows 2000 / Sun JVM than > > > under Linux 2.2 / Sun JVM. > > > > > > Linux users probably already know that linux does not support real > > > threads. Under heavy load, JBoss will for example crash with 200 > > > concurrent users under linux, whereas it can handle 1000 of them on the > > > same box with Windows 2000. Of course, if you use Apache or Jetty in > front > > > of JBoss to handle the thread pooling, this will not be a problem. > > > --</snip>-- > > > > > > How about Orion, has anyone compared Win2k and Linux regarding speed? > > > > > > The last paragraph is really alarming -- is it really so that Linux is > not > > > a wise choice as a production platform? Is this why UNIX is so popular > in > > > production environments? Or is JBoss just coded poorly? How many users > > > (sessions) can Orion handle, is there a difference in Win2k / Linux / > UNIX > > > performance? > > > > > > Cheers, > > > Peter > > > > > > > > > > > >
