How To Keep Number Of Apache Running Processes Down
Mar 30, 2007
I have small issue with load speed of pages when number of apache running processes goes over +-310, during peak traffic of day. IE: They load really slow.
Here's pic of what I mean:
=> [url]
Only thing that fixes it temporarily (at least until peak traffic ends) is to stop either httpd or mysql for several seconds, as everything cools down, then start it back up. Stop/starting mysql usually has longer terms temporary fix.
Anyway, would you have any ideas on what to configure or change within the system in order to keep the processes under 300?
The load is normal. Even at load 40, pages are blistering fast, as long as processes are under 300. So it's got nothing to do with load.
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Oct 10, 2013
I'm new to fcgid on Windows. my current set up is as follows;
Windows Server 2008
Apache 2.4.4
PHP 5.3.27 (fcgid)
MySQL 5.6.14
1. Looking at windows task manager, each of my processes have 4 threads each. What does this mean?
2. Does the number of FcgidMaxProcesses x memory_limit = Total amount of memory required?
3. Number of Threadsperchild = number of FcgidMaxProcesses ?
I just want to know how these two work together.
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Feb 13, 2007
I'm not sure I understand the server-status page enough to know if this is a problem or not, but I have several processes that seem to run forever, or until I restart Apache. e.g.
Code:
13-1 21045 0/697/4264 W 59.45 19641 0 0.0 43.28 274.97 66.249.66.133 www.example.com GET /wp/2005/01/ HTTP/1.1
19-1 408 1/834/1831 C 83.52 32463 0 14.8 149.66 263.48 66.249.66.133 www.example.com GET /wp/ HTTP/1.1
30-1 14416 0/430/431 W 35.19 13347 0 0.0 37.42 37.44 66.249.66.133 www.example.com GET /wp/category/issues/ HTTP/1.1
They are almost always on a single domain (there's about 100 on the server) that's a Wordpress site. These processes are also almost always a search engine.
On the rare case I see them running on other domains on the same server they're always on Wordpress sites.
The longer the processes run, the more processor/memory they use, the more they slow the server down.
It seems to have just started in the past few weeks, I've had the site there for a couple years.
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May 17, 2014
Our server is running; Plesk 11.0.9 and CentOS 5.7 it has a Q8200 CPU @ 2.33GHz and 2GB of RAM. Now there are just two websites on the server plus a couple of redirects/forwarding domains, although lots of domains are still on the server but turned off in Plesk. Both websites are OSCommerce sites and I just need to keep these sites going until the end of the year when we will switch to our new Joomla based website.
We have seen an increasing number of server crashes and after various checks of the logs, fitting a new BIOS battery, check of the hardware by EasySpace who host the server, installation of ClamAV, LMD and RKHunter (which did find some Trojans and Suspect software), I have traced it down to some external Http activity that is taking all of my CPU time and RAM. Here is a screen capture of the Htop listing and when I killed these processes the CPU and RAM went back to normal. The problem is that I usually have to restart the HTTPD service and sometimes things get so bad that the server crashes and I have to request a power cycle.
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Feb 5, 2008
so here is a simple question that i just can't seem to figure out.. when i run the command top or ps -auxw.. they show the httpd processes as the command httpd or /usr/sbin/httpd, but how do i know what file that is? is there anyway to find out what file that is actually getting executed or served?
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Jun 14, 2007
To start the process in the background how and hide him?
In the system CentOS is command "screen" There is the command screen
a system debian does not have this command, only "&" but I do not know her to use.
Please pass equivalents:
Centos: screen
Debian: &
Centos: [CTRL] + [A] + [D] (detach)
Debian: ?
Centos: screen -ls
Debian: ?
Centos: screen -r
Debian: ?
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May 1, 2009
I have some problems with apache.
As you can see below, long-live httpd processes use a lot of CPU / Ram.
Usually this processes caused high LA - 8-12.
Code:
%CPU CPU NI S TIME COMMAND
0.2 - 0 S 00:00:27 nginx: worker process
0.3 - 0 S 00:00:29 nginx: worker process
0.3 - 0 S 00:00:30 nginx: worker process
3.3 - 0 S 00:04:09 /usr/local/apache/bin/httpd -k start -DSSL
3.4 - 0 S 00:04:16 /usr/local/apache/bin/httpd -k start -DSSL
3.5 - 0 S 00:05:50 /usr/local/apache/bin/httpd -k start -DSSL
3.6 - 0 S 00:05:40 /usr/local/apache/bin/httpd -k start -DSSL
3.6 - 0 S 00:05:16 /usr/local/apache/bin/httpd -k start -DSSL
3.6 - 0 S 00:06:04 /usr/local/apache/bin/httpd -k start -DSSL
3.7 - 0 S 00:06:06 /usr/local/apache/bin/httpd -k start -DSSL
3.7 - 0 S 00:00:55 /usr/local/apache/bin/httpd -k start -DSSL
3.7 - 0 S 00:06:10 /usr/local/apache/bin/httpd -k start -DSSL
3.7 - 0 S 00:06:10 /usr/local/apache/bin/httpd -k start -DSSL
3.7 - 0 S 00:06:10 /usr/local/apache/bin/httpd -k start -DSSL
3.8 - 0 S 00:06:12 /usr/local/apache/bin/httpd -k start -DSSL
3.8 - 0 S 00:05:40 /usr/local/apache/bin/httpd -k start -DSSL
3.9 - 0 S 00:06:28 /usr/local/apache/bin/httpd -k start -DSSL
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Jan 14, 2015
Apache keeps increasing processes and when it reaches 256 value, it crashes. These are the values from our conf file. This doenst happen everyday, it occurs once or twice a week and at random timing.
Timeout 120
KeepAlive Off
MaxKeepAliveRequests 100
KeepAliveTimeout 15
<IfModule prefork.c>
StartServers 8
MinSpareServers 5
MaxSpareServers 20
ServerLimit 256
MaxClients 256
MaxRequestsPerChild 4000
</IfModule>
I enabled server-status and found request for index.html, is holding the processes. Only thing i see in access logs is ""OPTIONS * HTTP/1.0" 200 - "-" "Apache (internal dummy connection)""
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Mar 22, 2008
I do a ps aux, and get a bunch of:
/usr/sbin/httpd
Each one takes up like 4% of the available ram - and when the ram is gone, the server dies (it doesn't have a swap file - half the time you can't even log in to it), and you have to reboot Apache.
I thought of limiting maxchilds, but would that break something else?
Should I just make a swap file? Will that defeat the point of creating child processes?
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Apr 24, 2007
I have 2 almost similar webservers:
debian 3.2, P4 3GHZ, 1 Gb ram, kernel 2.6, apache2, php4
Initial apache2.conf:
Code:
Timeout 4
KeepAlive Off
KeepAliveTimeout 2
ServerLimit 1500
<IfModule prefork.c>
StartServers 10
MinSpareServers 10
MaxSpareServers 15
MaxClients 1500
MaxRequestsPerChild 3000
</IfModule>
I update the sources.list on server 1 to mirrors of the new debian 4 etc . I run apt-get update and apt-get dist-upgrade . A whole bunch of things get updated (it was long time ago that I did this anyway). After some troubles with /boot/grub/menu.lst the server boots ok, and everything is well. This server used to have loads of 15-25 at peak times, but after the update its running very smooth with loads of 2-3 at the same peak times. I dont know why exactly, as I noticed updates in OS , kernel version (from 2.6.8x to 2.6.18) , apache2 , php (4.4.4-8+etch1) , and I also needed to update eaccelerator from 0.94 to 0.95 .
A few days later I update server 2. Everything seems to go the same, although the kernel version stays at 2.6.8-3-686. I dont think kernel version at start was exactly same at server 1. But the new php version is the same as server 1, and everything else looks the same too.
But when peak times are coming up, this server starts to have troubles. It is quickly rising to total of 200-300 processes , while server 1 always stays stable at 60-70.
Server 2 also reacts slow if I click somewhere on the site. It takes 5-10 seconds to show a new page. However the load stays pretty low at 1-2 . I see no big cpu usage and also no big memory usage. I have the impression that this server 2 is somehow wasting a lot of apache processes and is making things hard for itself without a real reason.
When I check the seperate mysql database server, I also notice a lot of processes.
Around 200-250 whereas it used to be 40-60. Sometimes this adds up so hard, that all webservers are blocked because mysql has too much processes. When I check the mysql connections, I see a few dozen things like 'unauthen ip:port Connect login' just hanging. All of them have the ip of webserver 2. Those extra apache processes are somehow hanging on to the mysql server without really doing something.
I dont know what is happening, but this server is underperforming very badly now. I managed to limit the problem by drastically lowering ServerLimit and MaxClients on webserver 2 , but this is no real solution. The server is still slow, at least now its not bringing down the others.
My question : what should I check for now ? I noticed a different structure in the conf files in debian etch, maybe something new has a bad influence on my old conf files? Is there something wrong with the combination of kernel+php version? I have no idea, please point me in the right direction so I can learn from this.
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Feb 24, 2007
I would like to know what is the maximum number of Apache connections a Server can handle? Does this depends on the Config of the Server? Is it Possible for a server to handle more than 2500 Active Apache connections without timeout / connection failure / slowness?
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Nov 18, 2014
I implemented a Reverse Proxy using apache2 v. 2.4... What i need to do is limit number of sessions against a Virtual Host. Is that possible?
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Apr 11, 2013
I am trying to figure out how Apache is working on windows 7 - so far so good - but how do I set restrictions and limitations on bandwidth usage and max number of IP-connections?
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May 20, 2015
I use url http://myurl:8020/ERC to access application and I am able to. But I dont want to use port number in the URL.Would like to access application using http://myurl/ERC . I referred to one of the post and added below entries to httpd.conf file.
ProxyRequests Off
ProxyPass /ERC http://myurl:8020/ERC
ProxyPassReverse /ERC http://myurl:8020/ERC
But I am still not able to access http://myurl/ERC.LoadModule entries are enabled and I have restarted apache.
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Oct 27, 2009
Cpanel have option for compile with limit number access from IP via apache?
I want earch IP can access 5 conection in apache.
Via cpanel is possible?
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Nov 13, 2008
I am facing to this trouble: apache max out the number of connections. When viewing status, all I get here
Code:
SrvPIDAccMCPU SSReqConnChildSlotClientVHostRequest
0-028240/6/65R 0.1414290.00.020.32 ??..reading..
1-028170/17/65R 0.111510.00.030.22 ??..reading..
2-028350/3/57R 0.20112210.00.000.24 ??..reading..
3-027570/33/62R 1.431412930.00.130.21 ??..reading..
4-026430/75/75R 2.12153190.00.310.31 ??..reading..
5-026440/52/52R 2.061610.00.240.24 ??..reading..
6-028180/13/60R 0.621600.00.070.22 ??..reading..
7-026490/63/63R 2.84143070.00.370.37 ??..reading..
8-028190/7/43R 0.271610.00.020.27 ??..reading..
9-028080/27/76R 0.361410.00.040.29 ??..reading..
10-026750/50/52R 2.9617630.00.260.26 ??..reading..
11-027720/23/49R 3.641600.00.100.19 ??..reading..
12-026620/64/64R 2.201520.00.290.29 ??..reading..
13-027730/25/64R 1.121500.00.140.19 ??..reading..
which account on server is the reason please? I am on CentOS box with DirectAdmin.
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Dec 29, 2014
I have installed apache 2.4.10 with tomcat-7 as backend .Proxypass has been added in apache to access tomcat via http port .now requirement is to restrict each Context to 100 sessions only , how i need to achieve this .
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Apr 7, 2014
I am interested to know number of current connections in my Apache server
Server version: Apache/2.2.15 (UNIX)
OS : Solaris 5.10
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Apr 3, 2014
I administer an Apache server under unix environment SunOS 5.10,I want to know the number of clients connected to my apache server
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Jul 11, 2014
Is it possible to limit the max number of concurrent access to an url?
Let's see the following example: URL...
/a1 concurrent access should be limited to for example 20.
While we have an other url:
https:/ssss.com/a2
/a2 should be limited to 30.
Is it possible to do it with some apache config?
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Jan 30, 2014
Have to type the full address with port number....
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Aug 27, 2013
I am attempting to install Apache HTTPD on a PC running Windows 7 Ultimate SP1.
VC9, VC10 & VC11 redistributables are installed.
When I attempt to start Apache - both from the command line and as a service - I receive the following error messages:
[Tue Aug 27 15:33:27.624800 2013] [mpm_winnt:notice] [pid 5192:tid 284] AH00455: Apache/2.4.6 (Win64) configured -- resuming normal operations
[Tue Aug 27 15:33:27.626800 2013] [mpm_winnt:notice] [pid 5192:tid 284] AH00456: Apache Lounge VC11 Server built: Jul 15 2013 20:45:22
[Tue Aug 27 15:33:27.626800 2013] [core:notice] [pid 5192:tid 284] AH00094: Command line: 'C:Apache24inhttpd.exe -d C:/Apache24'
[Tue Aug 27 15:33:27.667800 2013] [mpm_winnt:notice] [pid 5192:tid 284] AH00418: Parent: Created child process 7684
[Tue Aug 27 15:33:27.668800 2013] [mpm_winnt:debug] [pid 5192:tid 284] mpm_winnt.c(422): AH00402: Parent: Sent the scoreboard to the child
[Tue Aug 27 15:33:27.704800 2013] [:crit] [pid 7684] (-2146173818)Unknown error: AH00141: Could not initialize random number generator
[Tue Aug 27 15:33:27.709800 2013] [mpm_winnt:crit] [pid 5192:tid 284] AH00419: master_main: create child process failed. Exiting.
[Tue Aug 27 15:33:27.710800 2013] [core:info] [pid 5192:tid 284] AH00096: removed PID file C:/Apache24/logs/httpd.pid (pid=5192)
The Windows event viewer merely says that HTTPD stopped with an application-specific error #1.
I have also tried with SSL both enabled and commented out.
For what it is worth the message appears to be generated by the routine ap_init_rng in the server core.c module.
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Oct 23, 2014
I am attempting to add a header to a number of requested urls i.e. domain/feeds/chicago, domain/feeds/*.I understand that this can be achieved by
•using mod_rewrite to set an environment variable
•using mod_headers to add a header based on the existence of an environment variable.
So far I can add the a new header thus Header add RSS_FEED_URL "Akamai-Edge-Control"
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Jan 23, 2014
I've upgrade Apache to 2.4 and the CGI that worked under 2.2 are not working. Instead of executing the CGI, it just displays them.
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Oct 5, 2007
I'm new to Private Virtual Server and the package offered by different company are quite confusing.
I was on RackForce and their basis VPS package dds200-L can host 100 domain names on Plesk and unlimited domain names on WHM/Cpanel.
On 1and1 it didn't say if Plesk support 100 or unlimited domain names. My question is, do we always have the liberty to host unlimited domain names on our PVS?
Can anyone recommend a good VPS hosting company?
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Oct 28, 2008
All my sites, Cpanel and WHM are down, yet httpd is up and running. Any idea as to how I should go about troubleshooting this issue?
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May 9, 2013
I've installed apache on my windows 2008 vps . It's run and when I browse localhost , it's works fine . But when I enter the vps ip address , it says Chrome could not connect to ... , I'm sure that httpd is running on port 80 (I checked it via netstat -ao and task manage ) ....
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Feb 28, 2013
I'm not an admin, I can't make apache run cgi's, I have followed several documents in different pages without luck, I can run normal html pages but not cgi's. I only get the code displayed in screen.
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Oct 27, 2008
How stable is Apache for Windows XP Pro?
Can i get the mod_rewrite to work just fine?
Is this a good idea if im no linux buff, or should i just go ISS?
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