Process Apache Too High - Server Goes Down
Apr 13, 2007
I have server in LT, the network is so good, but i got problem with the apache, it keep going down because the process too high ( i think)
when i list the process it show me :
nobody
0.000.250.0 Top Process%CPU 98.9/usr/local/apache/bin/httpd -DSSL Top Process%CPU 98.8/usr/local/apache/bin/httpd -DSSL Top Process%CPU 2.9
Other than that all domain only use not more than 10% process, I use Cpanel X and Cpanel XP skin, please help
Now my domain , will get blank page when try to access, i dont know why, even though all service is running and i already reboot the server
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Nov 8, 2008
I have extremely high CPU load average, but when I run TOP command there are not any process with high CPU
CPU load averages:
211.65 (1 min) 227.29 (5 mins) 247.89 (15 mins)
Tasks: 364 total, 2 running, 360 sleeping, 2 stopped, 0 zombie
Cpu(s): 0.0%us, 0.3%sy, 0.0%ni, 0.0%id, 99.7%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 2065460k total, 2012372k used, 53088k free, 60964k buffers
Swap: 2040212k total, 3280k used, 2036932k free, 619900k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
19871 root 15 0 4944 2488 1656 R 1 0.1 0:02.73 top
1 root 15 0 4208 1320 1136 S 0 0.1 0:01.55 init
2 root RT 0 0 0 0 S 0 0.0 0:00.00 migration/0
3 root 34 19 0 0 0 S 0 0.0 0:01.77 ksoftirqd/0
4 root RT 0 0 0 0 S 0 0.0 0:00.01 migration/1
5 root 34 19 0 0 0 S 0 0.0 0:01.16 ksoftirqd/1
6 root 10 -5 0 0 0 S 0 0.0 0:01.04 events/0
7 root 10 -5 0 0 0 S 0 0.0 0:00.65 events/1
8 root 10 -5 0 0 0 S 0 0.0 0:00.00 khelper
9 root 11 -5 0 0 0 S 0 0.0 0:00.00 kthread
35 root 10 -5 0 0 0 S 0 0.0 0:00.15 kblockd/0
36 root 10 -5 0 0 0 S 0 0.0 0:00.00 kblockd/1
37 root 15 -5 0 0 0 S 0 0.0 0:00.00 kacpid
127 root 10 -5 0 0 0 S 0 0.0 0:13.16 ata/0
128 root 16 -5 0 0 0 S 0 0.0 0:00.00 ata/1
129 root 10 -5 0 0 0 D 0 0.0 0:01.15 ata_aux
130 root 10 -5 0 0 0 S 0 0.0 0:00.00 kseriod
158 root 16 0 0 0 0 S 0 0.0 0:00.00 pdflush
159 root 15 0 0 0 0 D 0 0.0 0:01.00 pdflush
160 root 10 -5 0 0 0 S 0 0.0 0:10.68 kswapd0
161 root 11 -5 0 0 0 S 0 0.0 0:00.00 aio/0
So my server is "unresponsive" for abour 18 hours, burst net didnt answer my tickets and I dont know what to do. Ive been with this setup for almost 5 months with no problems, No changes have been made to hardware or software.
Im using Centos 5.0
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Oct 31, 2009
My server is very slow, High CPU, High Apache load....
I got a new server and i had setup a script on it.
No server tweaks has been done.
I run a filehosting site so it gets very slow when traffic is high.
Here is some info:
Code:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
4135 filedip 19 0 12812 8892 2212 R 18.9 0.4 0:00.74 index.cgi
3140 apache 15 0 22624 9604 2768 S 17.3 0.5 1:54.45 httpd
3556 apache 15 0 22792 9592 2768 S 17.3 0.5 0:43.53 httpd
3739 apache 15 0 22672 9556 2744 S 17.3 0.5 1:09.67 httpd
3884 apache 15 0 22664 9560 2744 S 17.3 0.5 0:23.98 httpd
3474 apache 15 0 22672 9572 2756 R 16.1 0.5 1:34.09 httpd
3548 apache 15 0 22792 9560 2740 S 16.1 0.5 1:33.67 httpd
3991 apache 15 0 22640 9588 2756 S 15.1 0.5 0:22.44 httpd
3475 apache 15 0 22672 9580 2756 S 13.2 0.5 1:31.42 httpd
3493 apache 15 0 22664 9592 2768 S 12.9 0.5 1:15.52 httpd
3769 apache 15 0 22664 9580 2756 S 12.9 0.5 0:45.19 httpd
3638 apache 15 0 22664 9576 2756 S 12.3 0.5 0:32.82 httpd
3724 apache 16 0 22664 9580 2756 R 12.3 0.5 0:34.25 httpd
3626 apache 15 0 22672 9580 2756 S 11.7 0.5 0:52.54 httpd
4023 apache 16 0 22792 9560 2740 R 11.3 0.5 0:13.16 httpd
3882 apache 15 0 22664 9576 2756 S 10.1 0.5 0:38.56 httpd
3005 apache 15 0 22672 9588 2768 R 9.1 0.5 2:06.61 httpd
I dont know much about server managment...
how to fix this so server doesnt go slow?
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Sep 4, 2007
I run a dedicated server, Running
CentOS 4.5 final
Apache 2.0.59
php 4.3.11
MySQL 4.1.20
I have a user who has been importing large sql databases and this causes the cpu to run at 80% - 90% this in turn causes high loads and sometimes causing the server to crash.
Is there a way to automatically limit or control how much the process can use or stop the process to allow the server to recover.
Just trying to put some sort of safe guard in place
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Jan 16, 2008
top output from my server shows a this user was creating a lot of proccesses, even this process has been running for about 30 mins, how can I limit the time a process can stay alive? I suspect it was causing a high load on the server when started.
PID USER PR NI %CPU TIME+ %MEM VIRT RES SHR S COMMAND
5374 jvmcompa 30 10 0 0:30.01 0.3 16456 6740 3532 S php
15586 jvmcompa 30 10 0 0:00.02 0.3 16052 6380 3460 S php
8165 jvmcompa 30 10 0 0:00.02 0.3 15248 6372 3432 S php
15785 jvmcompa 30 10 0 0:00.02 0.3 15520 6368 3436 S php
15272 jvmcompa 30 10 0 0:00.02 0.3 16236 6348 3412 S php
15345 jvmcompa 30 10 0 0:00.02 0.3 17052 6316 3432 S php
15396 jvmcompa 30 10 0 0:00.02 0.3 16324 6312 3432 S php
15472 jvmcompa 30 10 0 0:00.02 0.3 15740 6312 3432 S php
15803 jvmcompa 30 10 0 0:00.02 0.3 15092 6312 3432 S php
8255 jvmcompa 30 10 0 0:00.02 0.3 16504 6304 3404 S php
8281 jvmcompa 30 10 0 0:00.02 0.3 15504 6304 3404 S php
15260 jvmcompa 30 10 0 0:00.02 0.3 15296 6304 3404 S php
8136 jvmcompa 30 10 0 0:00.02 0.3 16308 6280 3412 S php
8153 jvmcompa 30 10 0 0:00.02 0.3 16500 6280 3412 S php
8092 jvmcompa 30 10 0 0:00.02 0.3 15196 6276 3412 S php
8145 jvmcompa 30 10 0 0:00.02 0.3 15280 6264 3412 S php
32263 jvmcompa 25 10 0 0:00.10 0.1 9564 1204 776 S pure-ftpd
31773 jvmcompa 26 10 0 0:00.01 0.1 9448 1120 728 S pure-ftpd
14657 jvmcompa 25 10 0 0:00.00 0.0 8420 988 696 S pure-ftpd
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Mar 23, 2015
I have a single mysql process that never stops and running with 10-200% CPU load: URL....
I restart mysql => process coming back
I restart server => process coming back
I kill process => process coming back
I have run:
# mysqladmin -uadmin -p`cat /etc/psa/.psa.shadow` -i 1 processlist
but there was noting that runs >10min.
Code:
> SHOW FULL PROCESSLIST;
+------+-------+-----------+------+---------+------+-------+-----------------------+
| Id | User | Host | db | Command | Time | State | Info |
+------+-------+-----------+------+---------+------+-------+-----------------------+
| 328 | admin | localhost | psa | Sleep | 56 | | NULL |
| 8110 | admin | localhost | NULL | Query | 0 | init | SHOW FULL PROCESSLIST |
+------+-------+-----------+------+---------+------+-------+-----------------------+
2 rows in set (0.00 sec)
I have strace the PID
Code:
# timeout 1m strace -f -c -p 5873
Process 5873 attached with 30 threads - interrupt to quit
Process 10499 attached (waiting for parent)
Process 10499 resumed (parent 5873 ready)
Process 10502 attached (waiting for parent)
Process 10502 resumed (parent 5873 ready)
Process 10503 attached (waiting for parent)
[code]....
I found with google a hint for high cpu URL....I have deinstalled "health monitor" module, but that was not the reason.I use plesk 12.0.18 Update #38 with CentOS 6.6 (Final).
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May 28, 2008
We have flash files site hosted on dedicated server in that Apache is utilizing the more CPU. When the server reached more than 1000 connections server get down automatically.
Hard Server Limit : 2048
MaxClients : 2000
Please find below the TOP status.
8450 nobody 16 0 19 0:20.52 1.2 39404 23m 3008 R httpd
3242 nobody 15 0 16 1:07.17 1.2 39696 24m 3032 S httpd
9492 nobody 16 0 12 0:00.39 0.7 29616 14m 3000 R httpd
3372 nobody 15 0 12 1:23.31 0.5 24864 9992 3036 S httpd
9477 nobody 15 0 11 0:00.88 0.5 24692 9784 3000 S httpd
9021 nobody 15 0 10 0:01.69 1.2 39660 24m 2996 S httpd
3240 nobody 15 0 10 1:39.71 1.2 39664 24m 3420 R httpd
4141 nobody 16 0 10 1:30.65 1.2 39792 24m 3032 R httpd
5458 nobody 15 0 10 1:04.21 0.5 24720 9824 3012 S httpd
9466 nobody 15 0 10 0:00.96 0.5 24672 9764 3000 S httpd
9478 nobody 15 0 10 0:00.98 0.5 24676 9764 2996 S httpd
3354 nobody 16 0 10 1:23.78 0.5 25132 9m 3044 R httpd
3361 nobody 15 0 10 1:21.61 0.5 24864 10m 3576 S httpd
5451 nobody 16 0 10 1:09.14 1.2 39664 23m 3036 R httpd
5457 nobody 15 0 10 1:12.76 1.2 39664 24m 3556 S httpd
9444 nobody 16 0 10 0:01.72 1.2 39656 24m 2996 R httpd
9481 nobody 15 0 10 0:00.65 1.2 39652 24m 3000 R httpd
3338 nobody 16 0 9 1:32.72 1.2 39256 23m 3036 R httpd
3360 nobody 15 0 9 1:44.38 1.2 39772 24m 3440 R httpd
4142 nobody 15 0 9 1:40.64 1.2 39760 24m 3440 S httpd
9493 nobody 15 0 9 0:01.25 0.5 24704 9796 3024 S httpd
9504 nobody 15 0 9 0:00.29 0.5 24688 9744 2984 S httpd
3305 nobody 16 0 9 1:08.11 1.2 39404 23m 3012 R httpd
3359 nobody 15 0 9 0:47.17 0.5 24812 9936 3032 S httpd
3363 nobody 16 0 9 1:44.42 1.2 39432 23m 3044 R httpd
5450 nobody 15 0 9 1:18.81 0.5 24900 9996 3032 S httpd
9486 nobody 16 0 9 0:00.59 1.2 39664 23m 2996 R httpd
3358 nobody 16 0 9 1:46.50 1.2 39520 24m 3452 R httpd
9096 nobody 16 0 9 0:07.87 1.1 38612 23m 3004 R httpd
3370 nobody 16 0 8 1:32.55 1.2 39200 23m 3012 R httpd
8515 nobody 16 0 8 0:12.52 1.2 39404 23m 3024 R httpd
9445 nobody 16 0 8 0:02.70 1.2 39404 23m 3000 R httpd
Apache Compailed with following modules.
./configure' '--disable-pdo' '--enable-ftp' '--enable-gd-native-ttf' '--enable-libxml' '--enable-magic-quotes' '--enable-mbstring' '--enable-sockets' '--prefix=/usr/local' '--with-apxs=/usr/local/apache/bin/apxs' '--with-curl=/opt/curl/' '--with-freetype-dir=/usr' '--with-gd' '--with-jpeg-dir=/usr' '--with-libxml-dir=/opt/xml2/' '--with-mhash=/opt/mhash/' '--with-mysql' '--with-png-dir=/usr' '--with-ttf' '--with-xpm-dir=/usr/X11R6' '--with-zlib' '--with-zlib-dir=/usr'
Apache : 2.2.8
PHP : 5.2.4
MySQL : 4.1.1
RAM : 2 GB
CPU : Intel(R) Xeon(R)
Cpanel Installed
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Jun 24, 2008
I have a fairly high end server in which I have installed SIM. SIM is restarting Apache up to 10 times a day, presumably due to high load causing un-availability.
On restart, Apache / MYSQL is stable until the load / mem usage begins to climb then it is restarted again. Here are my 'load' stats for today:
Load for today
High (2:18am): 4.63
Low (3:30am): 1.20
Mean: 1.84
Latest: 1.61
Mem usage for today
High (1:36am): 9,192.9 MB
Low (1:48am): 7,995.7 MB
Mean: 8,683.1 MB
Latest: 8,781.7 MB
I have seen it using 20GB RAM before.
I have tried to follow various optimisation guides but these seem tailored to less powerful servers.
The web application I run on this server is almost entirely MYSQL based, with thousands of DB calls a day. Across the entire system I probably get 200,000 bot hits per day or even more. At peak times search engine bots are literally hammering the server.
My server specs are:
# Processor: Quad-Core Xeon Processor * 8
# CPU Speed: 3Ghz
# RAM: 32 GB DDR2
# HDD: 36 GB 15k Raptor X2 + 1TB Sata
# OS: 32Bit CentOS
Changes / optimisation of the actual application is not possible.
My configuration files are:
My.cnf ....
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Sep 2, 2007
I deal with a server that gets positivey slammed once a week for a few months per year. I'd tell you how many hits we got tonight, but I'm still waiting for AWSTATS to chew through the 2gb access_log file...
Tonight, I made some changes that SEEM to work, but I"mn not sure what the long-term effects could be. If we have any apache experts on the forums, I'd really like to bend your ear for a few to see what you know.
Obviously, with PHP, we're limited to prefork MPM.
First of all, I dropped Timeout from 300 to 120. That should be MORE than enough time to know that we've timed out. Then I dropped KeepAliveTimeout to 5 from 15.
Here's the radical one. Watching the process list and the load, it seemed that load spiked when the processes hit their end of useful life and respawned. Duh. This was happening every four seconds at the load we were under. MaxRequestsPerChild was set to 10,000. I upped this to 80,000 over a period of hours that we were under the load. I didn't see any significant memory leakage, but it's the change I'm worried about the most. I've seen Apache do some bad things when people allow this to go unlimited, and had always used the relatively low default as a guide.
Besides not loading a bunch of dynamic modules (also done, I usually do this so I'm not worried about it), what else can I do tuning-wise to keep load down? Please note that caching and load-balancing aren't acceptable solutions; I have one server to work with (for now) and the boss says no to caching because of how frequently our information updates. We also have extensive .htaccess files, so there's no LHTTPD in my future.
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Mar 17, 2008
Ive recently installed installed and configured stuff on my new box but after, I realised abnormal memory usage.
Mysql server is taking 256mb, there are somewhere between 6 and 10 apache process taking up at least 40mb each.
Furthermore, when I do: top, I see that the memory usage is increasing by about 120ko each 3 sec.
I am running centos 5.1 and have a load of 0. Basically, there is no one on the server appart from me.
On the server I have at home running debian, I run all thoose thing and it take up 200mb
max.
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Jul 3, 2008
13438 nobody 15 0 42276 22m 13m R 22 2.2 1:51.94 httpd
10620 nobody 16 0 41928 16m 8468 S 19 1.7 0:28.54 httpd
11397 nobody 15 0 41524 12m 4784 S 18 1.3 0:06.04 httpd
10745 nobody 15 0 42376 14m 5316 S 17 1.4 0:06.62 httpd
The values in bold are the CPU percentage taken up by each apache process.
So i had to need to each apache process,who can i reduce it?what config i have to change to reduce it?
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Jun 9, 2007
I am in a bind with Apache's multi process limit. Let me explain what I am doing. There's this website which has career details of all the football players since the beginning of professional football. They have a simple web form which allows you to look at a player's profile by entering his name or his 7 digit numeric id number (on that website).
One of my client wants a list of all the players with a certain "flag" in their profile. So I created an automatic form submission and HTML parsing script to get details of all the players with that "flag" in their profile. Let me not go into too much details and tell you that after applying a few pattern rules to the id number, the number of possible id numbers comes to about 1 million (instead of 10^7; each field can have {0,1,2,3,4,5,6,7,8,9}=10 digits, so net combinations = 10*10*10*10*10*10*10).
Therefore, to completely automate this process I wrote a script which would generate an id number, submit the form with that id number, and parse the resulting HTML profile for the "flag". If the script finds a hit on the flag, it stores all the fields of that player in a database. This script is working absolutely fine but the speed I was getting was about one check per second which means that I would have to leave the script running for about 11 days (to process all of about 1 million checks).
So i came up with this idea to divide the check into ten parts and i created separate scripts for each part. Now basically the first script checks for the first 100 thousand combinations, the second checks for another 100 thousand combinations, and so on.
The problem is that I am able to get only two of these scripts running at the same time. So it would still take me at least 5 days to get all the results. The rest of the scripts just sit there in the server's backlog. This is definitely due to Apache's limitation to handle multiple processes. The server I am using to run this script as well the target webserver both run on Apache2. I am sure it's not a problem with the receiving server. It has to be my Apache web server which is running the scripts. I have tried using mpm_winnt (on a windows server) as well as the prefork and worker modules (on a linux server) without any luck. Has any of you ever faced the same situation?
For those concerned about the legitimacy of this work, rest assured, this is absolutely legit. There's nothing in the website's use policy which restricts somebody from doing this. Moreover, my client hired me to do this only because the website owners were not able to hand over the data he required. They gave the stupid reason that they are helpless in providing the data because they don't have a system in place which would allow them to do a search restriction!
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Sep 25, 2014
I recently switched from XAMPP to a self-setup WAMP installation using Apache Lounge's 2.4.9 package in order to improve performance, to have more tweaking possibilities and to solve some problems that I was not able to solve in XAMPP (e.g. creating large PDF files using TCPDF) on my local Windows 7 development PC.PHP is running as FCGI module, which I thought was a good idea to achieve good performance, but I am afraid I have messed up the configuration a bit.
What happens is that sometimes, PHP script requests do not seem to terminate(?), but I do neither know why, nor do I know what is happening. It probably has something to do with scripts that process kind of a larger
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Sep 19, 2014
I've got a quite difficult problem which I don't know hoe to solve. We use a self created ISAPI module which is a "business server" running behind an Apache.
From time to time a client app crashes the server (the circumstances are not quite clear) - and because there is only one server process, all other clients crash as well. Here is an exemplary log of a crash:
Faulting application name: httpd.exe, version: 2.2.22.0, time stamp: 0x4f242d7a
Faulting module name: ABCServer.dll, version: 1.0.0.1, time stamp: 0x53cfffa5
Exception code: 0xc00000fd
Fault offset: 0x00004cf6
Faulting process id: 0x94c
Faulting application start time: 0x01cfc5cc18c67d57
Faulting application path: C:Program Files (x86)Apache Software FoundationApache2.2inhttpd.exe
Faulting module path: C:datawwwabcremoteABCServer.dll
Report Id: d27d5891-31da-11e4-93ff-0003ff4356f9
Faulting package full name:
Faulting package-relative application ID:
Exception code: 0xc00000fd means stack overflow as I learnt. Therefore we configured mpm_winnt_module to use a 8M ThreadStackSize but this didn't work.
A solution might be that Apache starts for every client its own server process with the module ABCServer.dll. Because it is quite small and there are not thousands of customers this sounds like the perfect solution. No other clients/customers would be affected by a crash.
Unfortunately mpm_winnt_module supports only 1 process AFAIK. Worker and Prefork MPM are not available in Apache's Windows version what I read.
How can we configure Apache to start a new module process per client?
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Apr 1, 2015
It should be a straight forward change. [URL] .... does not redirect to [URL]...... It simply tries to load /denver-cars/ and denver-cars is in the URL. Am I missing something here? I have tried moving it up and down the list of rules and have tried numerous types of flags to no avail. Everything else in the htacess works fine with out the line:
RewriteRule ^/(.*)-cars/ /newcars-in-$1/ [NC,R=301,L]
Here is my htaccess:
Options +FollowSymlinks
RewriteEngine on
RewriteBase /
# Force www
# Redirect google index dir's to new dir
RewriteRule ^/(.*)-cars/ /newcars-in-$1/ [NC,R=301,L]
[code]....
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Apr 10, 2013
I'm looking to pass the entries to a web form, via Apache, to an external process (listening on a port say 4321) running on the same host as Apache.Is there a way to "coerce" Apache into doing this?
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Feb 20, 2008
I have a cPanel server with 4GB RAM
My server hangs time to time, once or twice a day. This is the last status when it happens.
Server Load 75.90 (2 cpus)
Memory Used 92 %
Swap Used 65.78 %
When I was still inside SSH when it happens, the processes I can see inside "top" are a lot of httpd processes.
So I "killall -9 httpd", I had to do it 30~40 times
#killall -9 httpd
#killall -9 httpd
#killall -9 httpd
x 30~40 times until no pid process found & the server load is back to normal.
Before that, I check httpd fullstatus, they look very normal, same goes to what I see inside WHM Apache status & cpu usage status.
At first I thought it was a memory problem after consulting with a server admin, so I replaced all 4GB new ram stick (such a waste)
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Jul 2, 2009
I have a site that is eating up my server resources and need to know what the best solution for this is. I'm thinking of getting another server just for mysql but do not know what specs the server should be to handle the current traffic/database load and have the site run smoothly without slowing down to a snail's pace.
An alternative is to get another server just for the videos being served and leave the database and html on the current server. This is where I'm stuck and don't know what route to take with this.
My current server stats:
Dual Xeon 5130
4GB RAM
250GB
50 Mbit/sec
CentOS 3.9
Website traffic stats:
15,000 visitors/day
150,000 pageviews/day
Serving videos
I've attached screenshots of top and bandwidth usage per day. Hopefully with this information you could tell me if I need another server or if there are any things I can do to the current server to help things move faster.
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Mar 19, 2007
Right now I am using the built-in cpanel backup feature to backup all the accounts on my server to an offsite FTP backup account I have on a weekly basis. The problem I am having is that everytime the backup runs, the load (thats what I'm guessing is the cause) is crashing apache/bind, causing sites to be unreachable until I can restart the services. What options do I have to resolve this issue? Currently I already have spri installed, and it does help out a bit, but its still not enough.
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Mar 26, 2009
I've search around quite a bit, but I can't seem to find a clear answer.
I've turned on mod_status, and on the status page, I'm worried Apache is being overworked.
Code:
CPU Usage: u334.883 s94.5703 cu177.422 cs0 - 43.3% CPU load
54.1 requests/sec - 181.5 kB/second - 3435 B/request
178 requests currently being processed, 52 idle workers
__RKKK__K___KW_CKCKC_KC_KCK_KKCCK_K_KKWCKCCKCWKKKCRCKKKK._K_C__K
KK_K__K_K_KK_C_KKKKK_KKW.KRCKWKKW_CCKWKRK..___KKCKKKKKKKR_KKKW.W
_KK_____RKRC.KKCKCCRK__CK._KWCK_KKRCCK.C__CR.CWCCKCRKK.RR.K_CR_K
C_KW._._K.K..KKK_KRCCKWKK__..R.CRWCKK.KCK.K.KK_K....._...KK.....
......KC.CK...C...CK......W........C............................
................................................................
................................................................
................................................................
At the time I took this particular snapshot, it's not near its peak... it's not uncommon for the CPU load approach 60%. Reading around, it seems the CPU load should normally be under 1% (such as 0.0139% or what-not). Is this true?
The weird thing though... I have no idea where that number is coming from, because according to "top", the CPU is actually 90% idle.
Here is my Apache MPM settings:
Code:
ServerLimit 512
<IfModule mpm_prefork_module>
StartServers 10
MinSpareServers 15
MaxSpareServers 50
MaxClients 1024
MaxRequestsPerChild 0
</IfModule>
I actually just raised the MaxClients from 512 to 1024 because I was hitting a constant cap of 40 requests/sec... and I was worried it was going to bottleneck. When I raised that value, the max requests per second now seem to be freed up.
If the actual CPU of the server is 90% idle... am I okay? Anyone know where Apache's getting the CPU Load info from?
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Mar 1, 2008
if anyone has had problems with high cpu load after upgrading APACHE to 2.2.8. We were running 1.3.5 with comfortable CPU loads of 2-10 on dual Xeon 2.8's. Now the loads are 20-70 with most of the CPU being used by many many httpd processes. I've heard that APACHE v2 does consume more resources, but am wondering if there was a problem with the build, or is it that much more demanding.
OTHER INFO:
WHM:11.15
CPANEL: 11.18
OS: CENTOS 4.6
KERNAL: 2.6.20.4-ts.grh.mh.i386
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Jul 29, 2008
We've a quadcore Xeon and start to have issues with its very high cpu load (which is made by apache & mysqld,).
So here is ps aux:
Code:
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 0.0 0.0 2040 620 ? Ss Jul13 0:13 init [3]
root 2 0.0 0.0 0 0 ? S Jul13 0:00 [migration/0]
root 3 0.0 0.0 0 0 ? SN Jul13 0:00 [ksoftirqd/0]
root 4 0.0 0.0 0 0 ? S Jul13 0:00 [watchdog/0]
root 5 0.0 0.0 0 0 ? S Jul13 0:00 [migration/1]
root 6 0.0 0.0 0 0 ? SN Jul13 0:00 [ksoftirqd/1]
root 7 0.0 0.0 0 0 ? S Jul13 0:00 [watchdog/1]
root 8 0.0 0.0 0 0 ? S Jul13 0:00 [migration/2]
root 9 0.0 0.0 0 0 ? SN Jul13 0:00 [ksoftirqd/2]
root 10 0.0 0.0 0 0 ? S Jul13 0:00 [watchdog/2]
root 11 0.0 0.0 0 0 ? S Jul13 0:00 [migration/3]
root 12 0.0 0.0 0 0 ? SN Jul13 0:00 [ksoftirqd/3]
root 13 0.0 0.0 0 0 ? S Jul13 0:00 [watchdog/3]
root 14 0.0 0.0 0 0 ? S< Jul13 0:00 [events/0]
root 15 0.0 0.0 0 0 ? S< Jul13 0:00 [events/1]
root 16 0.0 0.0 0 0 ? S< Jul13 0:00 [events/2]
root 17 0.0 0.0 0 0 ? S< Jul13 0:00 [events/3]
root 18 0.0 0.0 0 0 ? S< Jul13 0:00 [khelper]
root 19 0.0 0.0 0 0 ? S< Jul13 0:00 [kthread]
root 25 0.0 0.0 0 0 ? S< Jul13 0:01 [kblockd/0]
root 26 0.0 0.0 0 0 ? S< Jul13 0:01 [kblockd/1]
root 27 0.0 0.0 0 0 ? S< Jul13 0:01 [kblockd/2]
root 28 0.0 0.0 0 0 ? S< Jul13 0:03 [kblockd/3]
root 29 0.0 0.0 0 0 ? S< Jul13 0:00 [kacpid]
root 122 0.0 0.0 0 0 ? S< Jul13 0:00 [cqueue/0]
root 123 0.0 0.0 0 0 ? S< Jul13 0:00 [cqueue/1]
root 124 0.0 0.0 0 0 ? S< Jul13 0:00 [cqueue/2]
root 125 0.0 0.0 0 0 ? S< Jul13 0:00 [cqueue/3]
root 128 0.0 0.0 0 0 ? S< Jul13 0:00 [khubd]
root 130 0.0 0.0 0 0 ? S< Jul13 0:00 [kseriod]
root 205 0.0 0.0 0 0 ? S Jul13 0:46 [pdflush]
root 207 0.0 0.0 0 0 ? S< Jul13 0:43 [kswapd0]
root 208 0.0 0.0 0 0 ? S< Jul13 0:00 [aio/0]
root 209 0.0 0.0 0 0 ? S< Jul13 0:00 [aio/1]
root 210 0.0 0.0 0 0 ? S< Jul13 0:00 [aio/2]
root 211 0.0 0.0 0 0 ? S< Jul13 0:00 [aio/3]
root 383 0.0 0.0 0 0 ? S< Jul13 0:00 [kpsmoused]
root 433 0.0 0.0 0 0 ? S< Jul13 0:00 [ata/0]
root 434 0.0 0.0 0 0 ? S< Jul13 0:00 [ata/1]
root 435 0.0 0.0 0 0 ? S< Jul13 0:00 [ata/2]
root 436 0.0 0.0 0 0 ? S< Jul13 0:00 [ata/3]
root 437 0.0 0.0 0 0 ? S< Jul13 0:00 [ata_aux]
root 443 0.0 0.0 0 0 ? S< Jul13 0:00 [scsi_eh_0]
root 444 0.0 0.0 0 0 ? S< Jul13 0:00 [scsi_eh_1]...
They don't appear for some time if I kill them (a day or more). But it repeats again and again. One day there were 8 similar processes in total in max which used all 4 cores at 100% (and even ssh console was extremely slow to do something there).
I think that somebody is trying to make a small attack of some sort but I need to check it first. I tried to look at apache logs but there were too many posting requests from different IPs and no dublicates for little period of time so I had no success.
Anyway, that script worked for us for 4 years already and we didn't have any problems with it even on our old single core P4 2.8 ghz.
way to make sure is this an attack of some sort or just this script doesn't work correctly on our new machine?
Are there any ways to get IPs of visitors who are running posting.php with CPU overloading?
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Sep 10, 2008
been checking out this site for a while and finally decided to register because I have a problem. Also hope this is the correct forum for this topic, sorry if it isn't.
So I have a problem with Apache. One of the sites that I run/host has a moderately large vBulletin board, and Apache just seems to eat up the CPU. Load averages have shot up between 20-30 and I've seen it as high as 80. Apache and MySQL are optimized already, I'm using suPHP for security because there are other sites on this box.
The funny thing about this is that it only started happening about a week ago. After checking for rootkits and all that garbage, I reinstalled the OS just to be on the safe side. Everything comes back clean still. I also got fed up and hired Platinum Server Management for a month, to see if they could find a solution (and I've been interested in reselling their services, but that's not relevant). So far the only thing they can come up with is disable suPHP, which isn't an option. I do realize that suPHP is ~20-25 times slower than mod_php, but what totally baffles me is that it worked beforehand and started going all crazy like this. I did try running the site using an dso configuration, the load did drop, but nothing to be proud of.
This site, and the server overall hasn't had any increase in load, I've held off putting new accounts on it until I get this fixed.
In the meantime, I have said forums running on lighttpd, which lowered the load. (Also writing a tutorial on having lighty work with cPanel)
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Jan 22, 2007
write a cronjob so that apache will restart when the server reaches a load of 20.
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May 29, 2007
In the last day or two I've been having issues with memory on one of by boxes.
Something eats it all up, so the OS starts swapping, the I/O wait shoots up, and soon the load is up in the hundreds and the thing is totally useless.
During the day today I've tracked the something to occational apache processes. It seems that occationally a thread is started which uses upwards of 150M of memory. These threads are obvioudly doing something heavyweight and take a while to complete. When I get a few of them running together it soons finishes off all my available memory. Below is an extract from top when a couple of these threads are running.
Code:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
10230 nobody 25 0 197m 27m 9392 R 45.5 2.9 0:03.27 /usr/local/apache/bin/httpd -DSSL
10231 nobody 25 0 197m 25m 8376 R 52.8 2.7 0:01.60 /usr/local/apache/bin/httpd -DSSL
I was wondering if anyone could help out by suggesting some ways of tracking down what page/script it which uses so much memory. It's a cPanel server so it's not really practical to tail -f the apache logs (not knowing which account it is means I don't know which file to watch).
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Apr 6, 2007
I currently have a vps server from GIGEServers, running at 512mb of dedicated and 1024mb spike it seems like apache is using alot of resources, does anyone know of a less hog, or tips on tweaking it, and the same for mysql server any tips on tweaking.
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Jul 20, 2014
We are currently running plesk 11.5 and over the last few months, the apache memory usage has been very high. On investigation we have gone through the logs and we can't find a cause.
I can issue a service httpd restart and the memory drops for about 30 minutes and then we see the apache memory grow to almost 1.5 - 2GB. Why this keeps happening?
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