Server :: Determining System Limits Affecting Apache - Specifically RLimitMEM
Mar 15, 2011
Our Apache server is pretty much configured straight out of the box, and I've noticed it is using far more CPU and less memory than another server where I have the following:
RLimitCPU 8
RLimitMEM 100000000
RLimitNPROC 24
The Apache documentation says that if these aren't set, the values are obtain from the OS. How can you tell what those are? I'd like to see if I can tune Apache's performance, but I don't even know if these values are higher or lower than what it's currently using...
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Feb 9, 2011
I have the following inside /etc/security/limits.conf(I have specified root separately because * will not include it.)
user2 - core unlimited
* - core 0
root - core 0
[code]....
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Jan 30, 2011
I would like to limit any process from using more than 500 MB of RAM. AFAIK this is done using RSS in /etc/security/limits.conf but the process called gnome-panel apparently is using 618436 kB of VmRSS. How can this be ?
/etc/security/limits.conf
* hard rss 512000
username@debian:~$ cat /proc/3002/status
Name: gnome-panel
[code]...
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May 24, 2011
I have and embedded system which apparently, due to space considerations, is missing lots of normal commands. I can get the following information by "cat /proc/version":
Linux version 2.4.19-uc0 (...) (gcc version 2.95.3 20010315 (release)(ColdFire patches - 20010318 from http://fiddes.net/coldfire/)(-msep-data patches)) #461 Tue May 24 12:06:06 PDT 2011
At issue is the fact that, after some time, the system stops responding to the Network (e.g., you can ping it, then some time later you can't). We suspect that some sort of network monitor is accessing the device and causing the trouble, but don't know for sure.
What I would like to do is log some sort of useful network status information and/or be able to reset the network if I can figure out there is an issue from within the device.
I thought I had it all working using "/etc/init.d/network restart" but I've come to find out that the command is not recognised in this system. I also can't issue a "top" command to see what services are running. I can Telnet in, so I can try commands and see if they work.
Have any of you worked with such an abbr. system and if so, what might be around that I'm unaware of to help determine network status?
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Jul 16, 2011
I ran the 11.04 upgrade. At the end, it reported a failure, implied a recovery would occur and the upgrade then finished. The recovery was supposed to have run sudo dpkg --configure -a. That does not appear to have happened. I am concerned that a reboot will render my system inoperative.Has anyone else experienced a similar issue or have any suggestions? What information should I provide. report.
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Apr 9, 2011
I recently installed Ubuntu 10.10 (64bit) on my laptop (Toshiba satellite L300 64bit) and have since had horrible issues with the machine overheating. When the system is idle, the temp is decent, a bit warm maybe. If I start browsing the Internet, temp goes way up. I cant watch more than 1 and a half minutes of a ..... video without the system's temp exceeding acceptable limits, and shutting itself down. I have tried both the 32 bit and 64bit versions of ubuntu 10.10, as well as a 64bit version of 10.4. same overheating issues with all of these.
I am 99.999999 percent sure that it is an issue with my laptop's cooling fan, as although it appears to be spinning, it is so quiet that I would think it was off completely if I were to not tilt the laptop back and check to see if it is spinning. Also, the speed of the fan does not change, regardless of the machines temp. Even before it shuts off because of extremely high temps, the fan is still running at that same speed. I am currently downloading fedora 14, a different linux distro, to see if there is any difference.
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Nov 1, 2010
I'm planning on setting up a server cluster specifically for 3D video rendering. In order to maximize speed I wanna use OpenGL hardware acceleration for that and I'm pretty sure that I have to use an NVIDIA video card if I want the whole thing working reliably. Will I be able to start an X-Server with GLX on an NVIDIA video card that doesn't have a monitor connected to it? And what will be the maximum "virtual" display resolution that I can use?
Since I wanna have several servers running side-by-side I really don't have the room for any monitors.Just to avoid misunderstandings: It is not my intention to show what's being rendered to anyone in real time. I will only create video files that can be downloaded later. I'm already pretty sure that this will work, probably using "CustomEDID" or something like that, but I don't have a suitable setup available to test it right now.
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Apr 28, 2010
How i change the limits of e-mail sizes on the server. I have an e-mail server installed with CentOS3.
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Jan 28, 2010
I have a server running ubuntu 9.10 64 bit. It has samba running. I have ONE user that everytime she shuts down her windows machine I have to recreate the smbpasswd -a user. Every time, repeatable. A. How can a windows machine be affecting the password settings on the server. B. Refer back to A.
[Code]...
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Jul 31, 2011
I'm running a server using Debian 5, on which a few people log on to over SSH using a user account with limited permissions. Basically I want to make sure they can't run things like fork loops as a lot of bad stuff would happen were the server to hard reboot.So, how can I test what something like this will do:
Code:
:(){ :|:& };:
in a controlled environment, ie. so that I can kill it without rebooting?
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Jan 27, 2011
How to change the hostname without affecting current status ie i dont need to change the already having time, just rename the hostname.. what is the command to refresh
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May 10, 2011
I need to install different version of Perl with needed modules to Test Run a perl script (ASSP) without affecting the existing one as the old version of Perl is buggy with seg fault.
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May 27, 2010
i am using ubuntu 10.9 OS. and my problem is how to run apache server with xampp software and run phpmyadmin.
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Oct 14, 2010
I am trying to solve a problem where Apache stats aren't displaying correctly in Munin. I've ran through quite a bit of checks and tests regarding Munin setup, but I think my issue is related to Apache, but my skill set there is lacking.
first, system info:
monitored server:
CentOS 5.3 2.6.18-128.1.1.el5
[code]....
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Feb 8, 2010
I'm looking for a way to limit:
-memory usage (mb/user)
-cpu usage
-processes (amount and no same process multiply)
-connections (amount of connections (to specific host))
-bandwidth (kbps/user and even owerall for regular users)
-disk usage
-available commands
For every other users than me/root.
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Feb 4, 2010
Any one have an idea How to clear apache cache without restarting apache server.
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Jan 24, 2010
I am upgrading my server and I have a lot of sites. Since I cannot take my server down for a few days, maybe a week until I manage to migrate all the sites to the new machine, I figured I could migrate them one by one. After migrating one, I would somehow tunnel the requests of that name virtual host to my internal machine. When everything is migrated, I would then switch the machines, update ip's and stuff and everything will work just fine.
However I cannot seem to find a way to do this tunneling. is this at all possible? If not, what alternatives do I have?
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May 29, 2010
The Preferred Applications applet doesn't do what I need it to do.
What I'm looking for is a Win 3.x style File Association applet or config file so I can have .mp3's handled by Audacious and .m3u's handled by VLC, and so on. I'm sure it's out there somewhere, but I can't find it.
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Jul 20, 2010
I mainly do c/c++ development in linux...also i sometimes use java and i would really like it if i had mono also.. so i am pretty much looking for support for all major languages with ides...can u suggest me a distribution?
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May 10, 2010
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Mar 14, 2011
Looking at the output of netstat, I'm not seeing a definitive way to tell which torrent connections are clients reaching in to my machine vs my machine reaching out to the world. Is there a clear way to determine which is which?
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Jan 20, 2011
I am installing Big Brother on a CentOS 5.2 running the default Apache 2.2.3. When I try to access any web page I get the following error: Forbidden You don't have permission to access /bb/ on this server. Apache/2.2.3 (CentOS) Server at fmsubbnix Port 80 So far I have:
1) Set the Directory options to FollowSymLinks
2) Verified all directory and file permissions are at 755
3) Set permissions temporarily to 777 and received same error so I am assuming the issue is in a config file somewhere
4) in hhtpd.conf verified <Files ~ "^.ht"> is correct
5) verified the "default" directory is correct (/var/www/html)
I have read and tried several ideas in posts listed on the web but to no avail and am at a loss as to what to look for next..
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Sep 17, 2015
I have installed Debian 8.1 in several machines. Always I have a message for updating the systems I accept the upgrade.In one of the machines, where I did several upgrades, Inkscape never have been updated while in the others a updating from Inkscape 0.48 to 0.91 was made. I do not why and I would like to have Inkscape updated in all machines. is there some special condition for what packages will be presented for updating?
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Oct 18, 2010
How do I run Samba with a different option, specifically -D? Can I do it from the GUI (system-config-samba)?Also, how do I ensure it runs and startup?
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Mar 25, 2011
I have read a million threads about adding exceptions to Maximus, and I know how to do that, but is there any possible way of telling Maximus not to touch any programs except the ones I specifically want it to? Actually, the ONLY program I want it to touch is Firefox.
Is there some secret syntax I could put in the exceptions to the effect of "all and not firefox" (as in, make all programs an exception, except Firefox)?
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Mar 28, 2011
If I was to set up a Cluster, I know it wouldn't make much difference to loading up my browser, but would all heavy duty programs (Video Encoders mainly) work with it, or would I need to use programs specifically designed for cluster use?
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Oct 20, 2010
The following line is in the /etc/bashrc file. It's fedora 8. I know this is meant to configure the prompt but I don't know what the syntax is specifically doing.PROMPT_COMMAND='echo -ne "33]0;${USER}@${HOSTNAME%%.*}:${PWD/#$HOME/~}07"'I think that 33 is the ASCII character for ESC but not sure what ]0 does or anything after the HOSTNAME variable. Are these xterm control characters? All of my Google search results fail to explain it in any kind of meaningful detail.
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Sep 8, 2009
I am trying to remember the procedure used to determine the ip address range when given a network address and its subnet mask. Does anyone have any documentation on the steps that are done to accomplish this?
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Feb 8, 2010
I have two NIC cards installed, they both go to seperate networks. Occassionally I am not able to establish a connection via eth1. When looking at tcpdump traces I see that Linux is using eth0 hardware port and putting eth1's IP address in the packet to reply to the connection request. When the connections work its when Linux uses eth1's port.
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Mar 26, 2010
Is it possible to only view certain chains and more specifically certain chain policies with options when doing: iptables -L..I would like for example view FORWARD ACCEPT rules instead of waiting for all of the drop rules to load when viewing a firewalled iptables.
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