Debian :: Apache Takes Up So Much CPU For Some Of Requests?
Jul 16, 2010
Question 1: Hey. I noticed i have quite a few logs that end with .[number] for example "syslog.1" "mail.info.1" etc, why is this and why are they there since almost nothing is logged in them ??
Question 2: on my server im running a script like imagebam and imageshack with hosts images so i have quite a few apache requests to my server. I am wonder why apache takes up so much CPU for some of the requests ? in Htop some requests take up 1.2% CPU while other take up 3-5% etc, so the total load is about 1.50 0.58 0.84 to 2.61 1.08 1.14 with about 128-150 apache requests all the time while sometimes the CPU load can be almost 0 with the same ammount of requests. is this normal? what could cause this in apache ?? the server is just running apache2. MYSQL is running on another server.
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Mar 30, 2010
I noticed i have quite a few logs that end with .[number] for example "syslog.1" "mail.info.1" etc, why is this and why are they there since almost nothing is logged in them ??
Question 2: on my server im running a script like imagebam and imageshack with hosts images so i have quite a few apache requests to my server. I am wonder why apache takes up so much CPU for some of the requests? in Htop some requests take up 1.2% CPU while other take up 3-5% etc, so the total load is about 1.50 0.58 0.84 to 2.61 1.08 1.14 with about 128-150 apache requests all the time while sometimes the CPU load can be almost 0 with the same ammount of requests. is this normal? what could cause this in apache ?? the server is just running apache2. MYSQL is running on another server.
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Oct 16, 2010
my server into the public internet and must have my webserver [2.2.9 (Debian)] act secure. But this does not look very easy [I am searching, reading and working on it already the whole day ]. I read the apache docs, but there is a lot of stuff, which is different in Debian [lenny, 5.0.6]. Apache ignores the host-header given by the browser: [URL] are all served, but should be blocked. I new new to apachy, but on my IIS this works as expected. All browsers act equal [so no browser header problem].I configured two VirtualHosts, an excerpt:
NameVirtualHost hugo:80
<VirtualHost hugo:80>
DocumentRoot /usr/share/doc
[code]....
The I go to my hosts file on any box, and add hugo's ip-address under the new name x. Then, x is served, although the host-header in apache Every user coming from the internet could make the same!
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Sep 6, 2010
I've been scouring the message boards and trying different things for two days and haven't found a solution. I set up Ubuntu 10.04.1 a few days ago using the server iso and selected the LAMP installation option. I will be using it as a sandbox to try out things from a PHP/MySQL book I purchased.
I have installed Gnome since sometimes I just can't get the command prompt to let me do things and Gnome may at least tell me why. I also installed PHPMyadmin.
My problem is that I can work with this thing all I want in any way I want - HTTP, SSH, SFTP, etc. - from within my home network but Apache refuses to respond to an outside request. Since it's only a test box it usually wouldn't be that big of a deal but I am going out of town for a couple of days and would really like to start working with my new book.
I am 99% sure my ISP is not blocking any ports. I have a ComTrend ADSL modem with router. I have given my Apache server a static IP on the NAT (xxx.xxx.x.101) and set up a dyndns address so I don't have to keep remembering the IP address.
Here is what I have tried so far: Setup a virtual server (port forwarding) on the router to to direct traffic on port 80 to internal IP .101The router told me its interface is using 80 so it would move itself to 8080 Made sure to also add port trigger for port 80 Made sure to save/reset the router Used my iPhone to connect via 3G - didn't work using IP or dyndns name Used iPhone to connect to 8080 and router responded
Set port forwarding/triggering for 8080 -> 80. No joy there, either Tried changing listening port to 8000Set port forwarding and triggering to allow port 8000 Changed ports.conf to read NameVirtualHost *:8000 and Listen 8000 Changed first line of /etc/apache2/sites-enabled/000-default to <VirtualHost *:8000> Restarted Apache service
Apache responded to dyndns.com:8000 from home machine No response when trying same on iPhone (sorry, it's the easiest way for me to test from outside my home network)
At one point, I added "ServerName localhost" to the otherwise empty httpd.conf file but that didn't seem to do a darn thing.
Many of the posts I have perused are at least a couple of years old and have included information on taking action with files that are not there or are no longer where they were. I have interpolated where I can but so far nothing has worked.
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Mar 7, 2011
For some of the files that I share using Apache, I want to make sure that they are served ONLY via https.
How can I configure this for Apache?
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Feb 6, 2011
I'm trying to figure out how I can get a request count per CIDR/24 from an apache log in combined format - e.g.:
Code:
24.147.44.122 - frank [10/Oct/2011:13:55:36 -0700] "GET /apache_pb.gif HTTP/1.0" 200 2326 "[URL] "Mozilla/4.08 [en] (Win98; I ;Nav)"
I'm stuck using BASH for this and I generally write everything in Python, or even Perl if necessary so BASH isn't the most comfortable for me. I've got enough to extract the IPs and get a count I just need a slick way to come up with a sum on a per CIDR basis.
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Oct 7, 2009
I'm running wordpress and have gone to the painstaking effort of setting up the ftp server on my 5.3 machine so it can do its own updates and download plugins. However, I've found that if I try to download anything, I get a "unable to resolve host..." error from the script. If I watch Iptraf while making the request, I see all the port 53 requests going to 127.0.0.1. Pings are too.
However, if I ssh in, I can ping and wget and whatever I want all day long and all the DNS requests to go the router (Clarkconnect 3.2 gateway machine). The web browser in the terminal works fine too. What is it about the php scripts that is causing them to misdirect pings and dns requests? I've never seen anything like it and can't find anything on the web about it either.
[Code]....
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Nov 14, 2009
I'm working on a thorny mod_rewrite problem. I have a mac connected to my LAN running MAMP (Mac/Apache/MySQL/PHP). I request a non-existent file:
Code:
http://192.168.1.2:8888/careers/db/1.html
I see this in the mod_rewrite log file:
Code:
192.168.1.102 - - [14/Nov/2009:13:46:07 --0800] [192.168.1.2/sid#807df8][rid#8ec850/initial] (2) init rewrite engine with requested uri /careers/db/1.html
192.168.1.102 - - [14/Nov/2009:13:46:07 --0800] [192.168.1.2/sid#807df8][rid#8ec850/initial] (1) pass through /careers/db/1.html
Note that the requested uri is /careers/db/1.html
If I change just the file extension on my request to PHP like so:
Code: [URL]
Then the request uri is totally different now. Here's the rewrite log:
Code:
192.168.1.102 - - [14/Nov/2009:13:47:23 --0800] [192.168.1.2/sid#807df8][rid#8fc850/initial] (2) init rewrite engine with requested uri /Applications/MAMP/htdocs/careers/
192.168.1.102 - - [14/Nov/2009:13:47:23 --0800] [192.168.1.2/sid#807df8][rid#8fc850/initial] (1) pass through /Applications/MAMP/htdocs/careers/
Note that the requested uri now has a full path which does not include the actual filename, /Applications/MAMP/htdocs/careers/
What the heck? More info. If I request [URL], I can actually access p1.php. The requested uri is /careers/db/p1.php. The problem appears to be because the filename starts with a number. I can also request [URL] and get thru to 1.php with requested uri /careers/db//1.php. Does mod_rewrite think /1 refers to a backreference or something? Why can apache handle the html file request properly and not the php file request?
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Jun 26, 2010
1-Can I have the shell command which allows me to have the number of reques ts/seconds under the Apache server?
2-And the number of sons threads in service/wait?
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Apr 1, 2011
On my server I provide OCR file conversion service but the problem is when a user uploads a file and it's being converted then if you open another tab and try to load the site it won't respond until that conversion is completed. In other words until the PHP script finishes execution apace doesn't serve any other request to the same browser.
Here is my apache configuration:
Code:
ServerTokens OS
ServerRoot "/etc/httpd"
PidFile run/httpd.pid
[code]....
You can check what I mean if you try to upload and convert a file and while the file is converting try opening the site in another tab.
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Dec 28, 2010
I've had a VPS running Ubuntu 9.10 x64 server, hosting 3 websites of mine for a few months now. This problem has been happening for a while. Every once in a while, probably every 2 or 3 days, I'll wake up in the morning, and apache won't be responding, no web pages will load. /etc/init.d/apache2 status, reports that apache is functioning properly. Every time I simply have to restart the daemon and things run fine for another few days.
I thought maybe it was a memory issue, so I lowered the MaxClients in the prefork module from 50 to 30 a few days ago, but the same thing is still happening. My VPS has 512MB of ram, burstable to 1GB, and according to Virtuozzo, there was only one night of high traffic where I even came close to that soft limit. I've checked my syslog, and there's absolutely nothing in there about apache. I've checked apache's error.log as well, and there's nothing in there that would indicate a problem either.
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Mar 18, 2010
A Linux (CentOS5.3) server is setup with apache reverse proxy. The reverse proxy server is opened to outside and an internal server is mapped to ProxyPass configuration. SSL certificate is also installed on the Apache reverse proxy server. The problem is, it is extremely slow in serving http requests through reverse proxy. There is no problem with server resources or bandwidth. When the internal server is directly accessed through Internet, there is no delay. The backend server and the reverse proxy server are also on the same switch (same subnet). When I searched the Net, there were recommendations to enable cache in Apache. I did so as follows in httpd.conf.
<IfModule mod_disk_cache.c>
CacheEnable disk /
CacheRoot "/var/cache/mod_proxy"
CacheDirLevels 5
CacheDirLength 3
</IfModule>
But still there is no progress. Do I want to enable cache in ssl.conf too? Or is there any other workaround to speed up Apache reverse proxy. Is there a way to check that caching is happening?
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Jan 2, 2011
Here are 2 questions
1.In the last line of the debian kernel handbook 4.2.2 Applying patches
It is possible to apply extra patches to the source before starting the build. First, you should apply the existing patches by running:
You will then find the patched source in the subdirectories debian/build/source_arch_none (default) and debian/build/source_arch_featureset (featuresets added).
You should apply the extra patches in the appropriate subdirectory. where can I find the "extra patchies" and how to do?
2.Even though More than 8 hours have passed, 4.2.3 Building many packages
To build all possible packages for this architecture, run:
To build all architecture-dependent packages, run:
To build all architecture-independent packages, run:
The 1st command still working. what is the all possible packages? and what I am doing?
I am just trying to rebuild debian linux kernel 2.6.26-2, Did I misunderstand?
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Oct 14, 2015
After mapping iscsi storage from my netapp and scanning for new devices I run multipath -v2 to create the multipath device handle under /dev/mapping/. This normally takes about 2 seconds or less on every other linux distribution I use. On Stretch it takes a little over 3 minutes. I have tried several different versions of multipath.conf but the result is always the same.
My most recent multipath.conf file is available here : [URL] ....
and the output of multipath -v4 is available here : [URL] ....
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Mar 25, 2010
Since recently statd at the boot time takes, more then 30s or even more.
It is laptop configuration, no NFS server(?) lenny with few installs from backports (open office and .30 kernel - for Intel 5300) vmwware (7), as well firestarter firewall
Can I disable it or change the boot order (via sysv-rc-conf ), so I can speed up my boot time?
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Feb 6, 2010
When I log into an Xfce session, the splash screen indicates the "starting window manager" step with a busy cursor for about 10 seconds or more. Mind you this is a 2.8 GHz Core 2 Duo machine.I have tried logging out, mv-ing ~/.config/xfce4 from a tty console, and logging back in, but the problem persists.I am running Xfce 4.6.1.3 from squeeze.
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May 24, 2010
I`ve triple checked this and every time I run compiz any window opened has no minimise maximize or any other buttons for some reason but I don`t know why.If I exit compiz from the icon there are still no window buttons until I log out and then back in again. I can`t find this mentioned elsewhere but it`s happening every time in Squeeze AMD64 fresh installation having only downloaded AWN and compiz (tried this without AWN running and same result).It seems to have a drawing issue as if I run AWN then only three icons can show up on the dock any others are just thin white lines but I have no idea why my buttons dissappear. Anyone able to enlighten me?EDIT: Well I realised that by default the window decorations bit was not enabled, enabling it solves the first issue so the white lines instead of icons in AWN can`t be related so will look into that seperately.
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Jul 21, 2011
Using Excel 2010 on a regular basis and have just had a new server installed at work. Since all 6 computers are joined on our network we seem to be having problems with opening Excel and when it does eventually open, it takes around 3-5 minutes to save a spreadsheet.
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Oct 13, 2009
I am running Centos 5.3. I ran no updates, performed no installs, nor changed any configuration immediately prior to this issue. My problem is this: when I run the command startx (default runlevel 3), it is a long time (5-10 minutes) before Gnome startx, and once it does start applications will not run. Also, when I try to use sudo (from any environment, even ssh), it is a long time (5-10) before the command is executed.
I cannot say for sure, but it seems like this is an intermittent problem. Sometimes X takes a long time to start, but once it starts it will launch programs. Sometimes X takes a long time to launch, but once it starts it will only launch certain programs. Though presently X always takes a long time to start, and I cannot successfully launch any programs.
A while back a had a similar problem to this (x taking long time to start, sudo taking long time to execute) and it ended up being a DNS problem. Unfortunately, I cannot remember exactly what it was and I stupidly did not document it. Maybe this is also DNS related, I don't know.
I don't know what log files to look at for problems with X, Gnome, and sudo taking a long time to start.
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Jan 18, 2010
i do have a strange problem get running php5 on lenny 64 inside apache2. i had installed it as all instructions on the web does: # apt-get install php5 libapache2-mod-php5 php5-cli php5-common php5-cgi
apt has enabled php automatically, so
/etc/apache2/mods-enabled/php5.conf does have inside:
<ifmodule mod_php5.c>
AddType application/x-httpd-php .php .phtml .php3
AddType application/x-httpd-php-source .phps
</ifmodule>
[Code]...
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Jun 7, 2011
i am working with an old system that uses a BIOS meant for embedded systems. According to my coworkers this thing boot some version of debian about two years ago. currently I have used there old image and a new one I made of the latest Debian stable build. both images fail to get passed grub.
to be clear the BIOS simply replies "loading grub" takes ten minutes and then crashes.
has anyone ever had trouble with grub crashing systems? this problem seems odd since is did boot with this two years ago and i still have that image.
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Jan 29, 2016
I have a host system which is running Ubuntu and a guest system which is running Debian_squeeze on qemu VM. I need to send created traffic from Ubunto to Apache2 web server which is running on Debian. I made a bridge, and I can access internet from Debian, but this access is limited! I can just open some URLs not all of them! My question is how I can access the webserver from ubuntu?
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Mar 23, 2011
I need to quiesce a VM manually and for that I need to somehow pause VM and hold incoming I/O requests.
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Aug 18, 2010
I'm trying to forward VNC requests from server a to server b, acctually I need the server a to be just VNC proxy and other servers behind server a can be responsible for VNC requests.I did it with this iptables rule but it didn't workAnd for notification all VNC sessions of mine are in range of 59100 to 59199
num target prot opt source destination
1 DNAT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpts:59100:59199 to:bbb.bbb.bbb.bbb
Do you know a better way or a way to fix it with iptables?
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Aug 15, 2010
I'm just asking about a script (ex, bash script) that will let me know how many requests to each website on the server? So is there a way to get know from shell how many requests or connections to each web site on the server, in order to determine which website is under flood or DoS/DDoS attack.
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Aug 6, 2009
Is there a maximum requests per second that CentOS can handle? For example, a site like wikipedia gets at least 30,000 requests per second, so could CentOS handle that many requests? Some people told me that CentOS cannot and i would need to get a custom kernel.
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Jan 24, 2010
Theres this php script which is to be run every 10 minutes :- php -q /var/www/extra/cron/cron.php
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May 12, 2015
I've installed Debian 6.0.7 with apache, php, mysql and phpmyadmin. We have a server with active directory and ldap where all the Windowsclients log on.
I want to view the username of the users visiting the Debianserver with $_SERVER["REMOTE_USER"] so I can give them personalized settings.
Tried installing the NTLM module from sourceforge but that didn't work, winbind also didn't work ...
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Feb 10, 2016
I am trying to access logs Apache logs (I just installed Apache) and it is giving me permission denied errors. What permissions did you give to yourself in order to access these logs or should I just add this user(myself) to adm group?I can access other log files with no problems for example ssh logs.
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Oct 8, 2010
I just installed a net-install of debian 5.0.6. with no GUI and Apache http d. Does anyone know where I can find or how to do a basic Authentication on my web server (user-name and password) I found some stuff but they include .HTpass (of Apache) etc etc, but I can't find them anywhere
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