- wlug - University of Waikato Mail Lists

RH9
by Mark 21 Oct '03

21 Oct '03

Hi all, Does anyone have RH9 that I can copy? Mark

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Committee meeting
by Craig Box 21 Oct '03

21 Oct '03

Hi everyone, Seems our automatic "announce committee meeting" scripts aren't working yet, so sorry that the notice for this meeting is short. We are having a WLUG committee meeting tomorrow night, with the current tentative agenda: - library (Craig: publishers; Daniel: LJ) - advocacy (WLUG branded {G,K}noppix) - meeting arrangements - advertising If anyone wishes to add an item to this agenda or has something they would like to bring up at the meeting, please email secretary(a)wlug.org.nz before 3pm tomorrow. Thanks, Craig

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Re: "Too many open files" error
by Roger 19 Oct '03

19 Oct '03

I have made some progress on this problem. I upgraded my Sun JVM from 1.3.1_08 to 1.4.2_01 and the problem has very significantly improved, not gone completely though. In due course I think I need to check out the number of objects created by my application as it may be excessive. Thanks again for all the help Roger

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WLUG meeting is one week away
by Meeting Reminder Bot 19 Oct '03

19 Oct '03

Today is 20/10/2003 The WLUG meeting is one week away CraigBox's Birthday! The topic will be "Giving Craig Gifts and Adoration", by order of the WLUG Secretary! And the subtopic Anti-Virus and Anti-Spam for Linux. Suggested synopsis (please add to me) * Why viruses in Linux (and almost any other non-MS operating system) are not currently an issue, and are unlikely to ever become one. + http://www.theregister.co.uk/content/56/33226.html * getting your LinuxRouterBox to run Exim, Amavis, SpamAssassin, Razor and ClamAV (CraigBox/GreigMcGill) + MailScanner * BayesianFiltering in Mozilla (DanielLawson/PerryLorier?) * plugging SpamAssassin into Evolution (anyone?) + [link] http://support.real-time.com/open-source/spamassassin/evoluti on.html + [link] http://www.atlantawebhost.com/articles/evolution_spamassassin .php + bogofilter & marking msgs spam/ham: [link] http://www.ime.usp.br/~rsilva/bogo-and-evo/ + .forward/.procmail: [link] http://lists.ximian.com/archives/public/evolution/2003-March/ 028045.html + Ximian's answer + http://krath.dk/linux/evolution_spamfilter/ * plugging SpamAssassin into KMail + [link] http://support.real-time.com/open-source/spamassassin/kmail.h tml + http://kmail.kde.org/tools.html * possible use of DNS to stop spam at the SMTP level - eg http://spf.pobox.com/, Reverse MX, or RR records (see http://www.irtf.org/asrg/survey_of_proposals.htm) * Virus scanning of cached web pages through the use of Squid, DansGuardian, and MailScanner (GerwinVanDeSteeg) _________________________________________________________________

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Re: [wlug] "Too many open files" error
by Roger 15 Oct '03

15 Oct '03

Thanks for the helpful suggestions. Using the commands you gave me highlight that it is JBoss and the JVM that appear to be using up the resources. However, the "Too many open files" error has now transformed itself into a JVM crashing problem. I have had this problem off and on for a number of months, but it has now reached the point where I can't work around it. I am fairly convinced that it is a resource limitation problem somewhere, but I'm no expert in Linux and am running out of time. The server is on a small network, so I was wondering someone would be prepared to come around and look at it, for an appropriate fee, to see if there was any obvious (to them) problem. Cheers Roger

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Help - Strangeness in a Redhat
by Raymond Burgess 15 Oct '03

15 Oct '03

Hey ppl, I have a couple of strange things happening on my system, if anyone has any ideas on what is cause them please let me know. First, I am running RH 9 on my workstation and have a RH 7.1 box running as a webserver. I mount /home via nfs from the RH 7 box to my workstation. I have noticed that write speeds to /home are very slow, with no obvious reason. If I copy a file from /tmp (local) to /home/raymond (remote) it takes forever, and there is next to no network usage or cpu load. Transfers in the opersite direction saturate the 10MBit connection. I am using the following options for mount: rsize=8192,wsize=8192,intr Any Ideas why writes would be so slow? I have ftp running on the RH 7 box and ftping the data to /home/raymond via ftp runs at fullspeed. Second issue is a also strange, once I reboot I am able to run up2date and any rpm command, so I can install packages but after a day or two for no reason these commands just stop. They hang on execution as if they are waiting for something. You can't stop them with CTRL-C either, you have to kill -9 the process. This means I have to reboot my machine if want to install a new package, which isn't as much of a problem now I have things installed but was initially a pain in the bu when I first built the machine. Any Idea? Thanks, Raymond.

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Re: [wlug] "Too many open files" error
by Roger 14 Oct '03

14 Oct '03

John R. McPherson wrote: >> Roger wrote: >> >>> I am running an application server on Red Hat 8.0 and every so often the >>> machine generates an error message "Too many files open" and then locks >>> up. I have to restart the machine from the console to rectify the >>> situation. Can anyone please tell me if there is some configuration >>> setting that I can change to increase the number of permitted files? Is >>> there some command that allows me to monitor the number of open files in >>> the system? >> >> >> The other reply was for kernel version 2.6-something, but as far as I >> know, under kernel 2.4.x and earlier, there is a hard-coded limit in >> the kernel - /usr/include/linux/limits.h has >> #define OPEN_MAX 256 /* # open files a process may have */ >> (but that is per-process, not in total). >> >> You could install and try the lsof(8) command - I haven't used it >> much, but it stands for "LiSt Open Files", so it sounds like what you >> want :p > >er, no. > >Under 2.4 a process can have a stupidly large number of fd's open, you >need to modify /proc/sys/fs/file-max and perhaps /proc/sys/fs/inode-max >which is the system wide limit, to raise the limit per process you can >use ulimit to raise it above the 256 (default limit) you mentioned above. > >Running out of fd's is a pretty nasty business, what on earth are you >doing to that poor machine? Are you running lots of programs? (like, >hundreds of copies of something?) > That is part of the problem, I am not precisely sure why there are so many files opened. I am running a fairly large J2EE application on JBoss and it seems to load heaps of files into the JVM. I may need to change some settings in JBoss, but that of course is the subject for another forum. Thanks for all the help. Roger

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"Too many open files" error
by Roger 14 Oct '03

14 Oct '03

I am running an application server on Red Hat 8.0 and every so often the machine generates an error message "Too many files open" and then locks up. I have to restart the machine from the console to rectify the situation. Can anyone please tell me if there is some configuration setting that I can change to increase the number of permitted files? Is there some command that allows me to monitor the number of open files in the system? Thanks in anticipation Roger

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Does anyone know anything about "rimuhosting.com"?
by Glyn Webster 12 Oct '03

12 Oct '03

RimuHosting is a web hosting company that does Linux Virtual Private Server hosting. http://rimuhosting.com/ RimuHosting's web page says it is based in Hamilton, but that is all. There are no names are full addresses anywhere on web site. Googling, I found a number of message boards posts promoting rimuhosting.com by someone called "Peter B". I'd feel happier if I knew more about the business than that. Other than that, does it look like good thing? A friend and I plan to run a few low volume websites from something like this. One will be a dynamic one using Apache, Python and PostgreSQL. Will those all run happily under a 64MB RAM? -- Glyn Webster ~ Simplicity Himself. ~ glyn(a)wave.co.nz ~ http://tiddly-pom.com

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Stable Versions of Linux for Applicaiton Servers
by Roger 11 Oct '03

11 Oct '03

I am wanting to set up a production application server using JBoss (written in Java) and PostgreSQL (written in C I believe), so would be interested in opinions as to what the most reliable platform would be for this. Firstly, I am wondering what flavour of Linux is considered the most reliable and what version. I am currently using Red Hat 8.0. Secondly, I am would be interested if people have experience with different JVMs for such a application. Perhaps another way of asking the same question: Are there any platforms or combination of platforms that should be avoided. Cheers Roger

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