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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Apache :: Number Of Fcgid Processes On Windows Server

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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Long Running Apache Processes In Server-status

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.

13-1 21045 0/697/4264 W 59.45 19641 0 0.0 43.28 274.97 GET /wp/2005/01/ HTTP/1.1
19-1 408 1/834/1831 C 83.52 32463 0 14.8 149.66 263.48 GET /wp/ HTTP/1.1
30-1 14416 0/430/431 W 35.19 13347 0 0.0 37.42 37.44 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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[Debian] Command "screen" How Running Background Processes

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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Long-live Apache Processes

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.

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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Apache :: Processes Keep Increasing And Hence Crashing

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

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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Apache Takes All The Server's Ram With Child Processes

Mar 22, 2008

I do a ps aux, and get a bunch of:


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:

Timeout 4
KeepAlive Off
KeepAliveTimeout 2
ServerLimit 1500

<IfModule prefork.c>
StartServers 10
MinSpareServers 10
MaxSpareServers 15
MaxClients 1500
MaxRequestsPerChild 3000

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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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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Nov 13, 2008

I am facing to this trouble: apache max out the number of connections. When viewing status, all I get here


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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