Server :: CentOS - Apache Using Lot Of Memory And CPU
Jul 30, 2011
I have a web server with the specs below and my apache server is being a hog using all my RAM 7gigs or 8gigs of ram. When there is a rush of traffic at once my whole server crashes and I have to reboot apache. The way my site is set up I have a tube script and I use the tube script to host videos on my forum I have 1000 videos on the tube script. I brought a bigger server and more ram because of the down time I been having . I am really trying to figure out why its crashing and using so much ram. I installed eAccelerator didn't seem to help with the apache server.
Intel Quad Core Xeon X3430 (4 x 2.40 GHz, 8MB Cache)
> 2-bay Supermicro Chassis and Motherboard
> 8 GB REG ECC DDR3 (twice your current setup)
> 250 GB Enterprise Grade SATA II
> 10 TB Bandwidth 1gig Uplink Port
> CentOS 64 Bit (Latest Stable)
TOP Command and free -m command screenshots are attached this is with only 160 people online at once
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Jan 12, 2010
I just opened an (unmanaged) VPS account and and have been encountering nothing but problems with trying to get Apache up and running (its something I've done many times before).Basically the inital error was with LDAP not having enough space, so I disabled the related extensions and Apache still would not run. Looking at the log, it contains: (28)No space left on device: Unable to create scoreboard (anonymous shared memory failure)
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Jan 4, 2010
I updated several packages on one of my servers on Dec 21st and have been seeing excessive swapfile usage since then. The problem process seems to be httpd which in our environment runs a subversion server as well as serving a number of php pages over https. At present I am having to bounce apache approximately every 5 days as it has used all 8GB swap in that time.
[Code]..
Of the updates listed as installed, the only one that looks likely to affect apache is glibc. Looking at the stats from sar -r I can see swap usage increasing by approx 3% (of 8GB) every hour.
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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 11, 2010
I have a VPS running a web application served using Apache, that on average deals with 20-50 requests per second. It's usually above this point (50 requests per second) that the amount of memory that Apache uses is too high for the VPS and errors start occuring - web pages crash and VPS falls over for a minute or two before going back to normal levels.
I believe that MaxClients is the best way to reduce the amount of RAM that Apache uses and I am planning to reduce MaxClients from 256 (default value) to around 100. Each Apache process uses ~15MB and the server has 1900MB of ram in total - the server does nothing else other than run Apache and a few crons.
Current setting are:
Code:
KeepAlive On
MaxKeepAliveRequests 100
KeepAliveTimeout 3
# prefork MPM
# StartServers: number of server processes to start
[Code].....
I tried reducing MaxClients before which lead to massive slowness, so I need some other options as well.
Does my suggestion of reducing MaxClients to ~100 seems sensible? What are my options if the server experiences slowness again - optimise the application? What's the best way to reduce memory usage - move images to another web server?
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Sep 12, 2010
Top only show the memory usage for individual processes. Apache often runs hundreds of processes, each of which may use only a small amount of memory, however the total memory consumed by all apache processes can be fairly large.Is there a way to see the total memory usage for all apache processes?
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Aug 27, 2010
I just ran into a weird problem with a CentOS 5.5 64-bit server running VirtualBox 3.2.8 (I would run Vmware Server 2.0.2 if not for the well known fact that Vmware doesn't care about its Server line anymore and it doesn't run on CentOS > 5.3 without major splits). I currently have two guests in that VirtualBox setup, a CentOS 5.5 64-bit and a Fedora 13 64-bit. The CentOS 5.5 guest shows less memory available than configured. If, for example, I give the virtual machine 512MB of memory the guest OS only recognizes 380MB. If I give it 768MB it only recognizes 637MB, and so on. I don't have that problem on the Fedora guest - 1024MB configured, 1024MB available.
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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 11, 2009
My server keeps freezing up requiring a hard reboot.
CentOS release 5.3 (Final)
httpd-2.2.3-22.el5.centos.2
Here is the error in /var/log/message
Sep 11 00:16:20 localhost kernel: httpd invoked oom-killer: gfp_mask=0x201d2, order=0, oomkilladj=0
Sep 11 00:19:14 localhost kernel: [<c0459e7d>] out_of_memory+0x72/0x1a5
Sep 11 00:19:14 localhost kernel: [<c045b352>] __alloc_pages+0x216/0x297
Sep 11 00:19:14 localhost kernel: [<c045c5bf>] __do_page_cache_readahead+0xc4/0x1c6
Sep 11 00:19:14 localhost kernel: [<c0436d9a>] ktime_get_ts+0x16/0x44
[Code]...
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Mar 18, 2010
I'm looking for a way to put a MySQL database in a server's memory. The disks aren't fast enough to keep up with the usage and I don't feel like going for a splitted web&db server yet because of the costs.
Because this involves risks (unless there's a way to read from the memory and write to the memory AND disks?), so I'd prefer that the DB gets copied automatically every hour or so to the local disks.
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Sep 25, 2010
I have a VPS that has 512MB of ram. I'm using it as a mail/web server. It keeps running out of memory. I know amavis/clamav are memory hogs, but I checked my ps aux and found 100's of instances of "apache-init-server" running. I killed them all, and they keep spawning back. What could be causing this. I've never seen this on a webserver before. OS: CentOS 5.5
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Jul 28, 2010
I have xen kernel on a 5.4_64 though it seems to have always done this regardless of version. When I add a virt the control set shows the total machine memory minus what I just allocated to the new virt. This also shows up in the system monitor as total available ram. Problem arises in deleting and making new virts. The memory never reappears as usable after deleting virts. So now after testing several different setups I'm down to 1.4 gigs showing available on the dom0. What can I do to recover this lost memory? I've searched, read, looked every where I could think of and there just doesn't seem to be any information about deleting virts only adding them.
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Mar 20, 2009
My server [URL] goes down in some cases.
On general time load average is 0,15-0,2 Only http(with php) and mysql working on it.
Here are some screens when the server goes down: [URL]
Here are the same bug with mine described: [URL]
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Jul 22, 2011
I am running a CentOS 5.6 Server with a website and Forum. The website has a contact form and users can email various people in the organization. I have setup sendmail to send any mails like this to my email address on a Windows machine.The problem is that there emails don't have a header which has the senders original email header. It comes from localhost on my sendmail. How can I get any mail generated from the apache site to ALSO send mail to root on the Centos Server? That way I should be able to see the header and report the spammer or block them.
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Jun 22, 2009
We had servers that worked fine for years. After updated them to the latest version of CentOS (5.2 with latest updates), they keeps on hanging when being scanned by PCI Verdors (a Credit Card security standard). Basically, the scan causes httpd process to eat up all memory, and the server becomes unresponsive. Normal operations resume after the scan stops for 5, 10 minutes. Output from top looks like the following:
Mem: 1018988k total, 1007168k used, 11820k free, 432k buffers
Swap: 2096440k total, 2096440k used, 0k free, 4528k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
13601 apache 16 0 289m 102m 456 D 4.0 10.3 0:15.25 httpd
12836 apache 16 0 330m 101m 232 S 2.4 10.2 0:17.57 httpd
12834 apache 16 0 341m 100m 292 D 8.9 10.1 0:17.70 httpd
12837 apache 16 0 317m 99m 456 D 6.0 10.0 0:17.66 httpd
12839 apache 15 0 327m 97m 232 S 0.0 9.8 0:17.37 httpd
13590 apache 15 0 287m 96m 228 S 0.7 9.7 0:15.18 httpd
12833 apache 15 0 333m 96m 232 S 2.2 9.7 0:17.58 httpd
12835 apache 15 0 322m 95m 232 S 0.4 9.6 0:17.50 httpd
12840 apache 15 0 310m 88m 232 S 6.9 8.9 0:17.34 httpd
12838 apache 15 0 297m 85m 232 S 1.3 8.6 0:16.52 httpd
12831 root 18 0 20644 1360 248 S 1.3 0.1 0:00.27 httpd
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Jan 21, 2011
My mail server stopped working this weekend, when I got in today I restarted and all the emails came through. The panic_log shows: daemon: accept process fork failed: Cannot allocate memory several times over the course of a few minutes. Can anyone give me advice on troubleshooting this one?
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Feb 22, 2011
What would be the best way to determine memory consumed by each application running on the server?
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Mar 28, 2010
I saw many people were talking about how to optimize apache and mysql here and also in other forums and blogs. I am currently hosting some sites and some IRCD processes (a tiny network)in a dedicated server with spec:
Quote:
Intel Dual Core 1.6GHz E1200
1GB RAM
160 HDD
10Mbits port
We got about 30,000 to 40,000 page views per day. I would like to ask people here about the opinion of apache and mysql optimization based on this server spec and current number of page view.
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Apr 29, 2010
I have Centos 5.4 installed on my server. Everything works perfect, however sometimes apache does not work properly. When I write my domain to browser it tries to reach the site, however it can't get any result. (There is no "browser couldn't find" error). The browser just tries to get the content.
When I login to my server with ssh using my domain name, there is no problem. (Named works.) When I give the "service httpd restart" command the problem disappears.I looked at httpd log files but there wasn't any problem at that time.I use the API's of the Facebook and Twitter, so there are many Curl requests are made with PHP. Could that be the reason?
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Sep 23, 2010
I'M trying to configure SVN in CentOS 5 without Apache, the connection should be possible with some SVNClient like tortoisesvn or another.
Following this guide i proceeded:
yum install subversion
useradd -d /home/svnroot -c subversion svn
passwd svn
svnadmin create /home/svnroot/proyecto_1
pico /etc/csf/csf.conf (enabled ports and restart with csf -r)
[Code].....
how to connect to the repository from my PC?
I don't know how to do it
I understand that this svn are running with svnserve but i don't know the way to connect from my PC with a svnclient, like rapidsvn or another.
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Dec 24, 2010
I need to do this to pass PCI compliance tests, I know it's not necessarily the best thing to do but it has to be done.
How would I go about compiling this version as it's not on the official repo?
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Apr 16, 2011
I have installed apache 2.2 from source and it works prefectly.
I compiled and installed php 5.2 but php pages resolve to page not found.
I checked the logs but did not find anything also apache has loaded the php5 module successfully.
Below is the apache configuration
[URL]
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Feb 24, 2010
I have the following function on my xmlrpc server side.
The registration of this function is done as follows from the main function:
The above function makes the server segfault some where on the return path and client gets the response:
Here is what GDB shows when server segfaults....
However if I remove the line "xmlrpc_strfree (node_name);" then server does not segfault and client receives the response correctly. In the xmlrpc-c code it clearly says " Return the string in newly malloc'ed storage that Caller must free." in xmlrpc_data.c::xmlrpc_read_string() which is the function that gets called from xmlrpc_parse_value().
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Dec 28, 2010
operating system: CentOS 5.5 git version:1.7.3.4 ldap server:OpenLdap Http server:Apache 2.2 the software above have been installed. How to config /etc/httpd/conf.d/gitweb.conf file to let git authed by ldap?
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Feb 3, 2009
I updated my CentOS 5 box recently. But after then my Apache can no longer work; every time I try to start apache, it says started OK but then dies immediately and no error message at all. When I tried 'apachectl restartI', it says apache not running. It has been running fine before the update. I've looked at /var/log/httpd.log but there is not any message about my problem.
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Feb 5, 2009
I've installed Apache Tomcat--6 and even jdk1.6.I've even created a tomcat.sh file to start the serverautomatically and it includes the Environment variables also ($CATALINA_HOME & JAVA_HOME) for automatic startup.Next when i'm using http://localhost:8080 to call the server it shows unable to connect.I've tried changing the port no of tomcat in server.xml file. but still its not working.
-->Then i tried using--telnet localhost comand--it shows Trying 127.0.0.1...
telnet: connect to address 127.0.0.1: Connection refused
telnet: Unable to connect to remote host: Connection refused
Here I'[m stuck i don't understand how do i make the localhost work.
-->If I'm giving telnet localhost 25 the sendmail server is working.But the 80 and 8080 ports are not getting configured.
-->I've tried adding the port and its name in /etc/services file but still its not working.
-->When I'm giving the command--/sbin/chkconfig --list--->Its shows: xinetd based services:
...
...
telnet on.what should i do to get my tomcat server work properly.
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Apr 21, 2009
We have Apache installed on CentOS 5.3 in our laboratory. Indeed the server is running fine for almost two years since it is actually the first CentOS 5 that was released just regularly updated. Now, most of our applications are custom made PHP applications and until now we somehow managed to avoid using PHP to fetch files that are on the internet itself. But now we are desperate because we need to allow PHP to fetch files through Apache but it seems as if Apache is not allowed to make a connection to the outer world. Additionally we use a proxy server to connect to the outer world so right at the beginning http_proxy is used to set that environmental variable. And for the root user it all works fine after that but it seems as if the apache user is not allowed to access the internet. Just to make a remark our web server can be accessed from the outer world so its a one way street for now.
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May 25, 2009
I run mysqld on another server. I just switched to another dedicated server now, and i'm having trouble connecting to the mysqld server. If i run the php script from the bash console( php connect.php ) it works perfectly and connects to the mysqld server. However, if i run the script from apache ( http://localhost/connect.php ) it returns this: Can't connect to MySQL server on '(mysqld real ip)' (13) Mysql connection from another server(old httpd server) works perfectly, so it's not from the database server.
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Aug 23, 2009
I'v multi v-host . need to make each V-Host work under separate user (not apache user).
There is one module/patch call " mpm-itk " . In Debian/Ubuntu every thing is sweet
just do
apt-get install apache2-mpm-prefork libapache2-mod-php5 or aptitude install apache2-mpm-itk
that is all
But in CentOS 5.3 , there is always some difficult different (Why ? I do not know)
Kindly, Look to this solutions : [URL]
Is there possibility to avoid this complications ?
- I need solution without compiling + patching the apache , Is this possible ?
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Oct 17, 2009
I am having a problem in that the Web Server (Apache) keeps stopping. I know this as watchdog is emailing me. Then about 15mins later it starts again. I cannot seem to find why. can anyone give me pointers as where to look to find the issue.
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