12-05-2008
pspace,
You can check your httpd service if your using prefork or worker by typing
httpd -V and look for
"-D APACHE_MPM_DIR="server/mpm/prefork"
that means your using prefork. if your MPM is worker then adjust instead of the prefork
<IfModule prefork.c>
StartServers 16
MinSpareServers 16
MaxSpareServers 64
ServerLimit 512
MaxClients 512
MaxRequestsPerChild 4000
</IfModule>
Bigger settings doesnt mean good for server. Your settings is a bloated at prefork settings and also workers MPM.
Please take a look at this site. or research more in performance tuning.
(dv) HOWTO: Basic Apache performance tuning (httpd))
Just to give you idea, 1 httpd process sometimes consumes about 128 MB of your memory and based on your settings if you started 16 httpd process(startservers) multply by 128 MB plus additional 16 more (min spare) thats a lot of memory consumption. I never include the max clients that is allowed.
So bigger is not always good for settings in apache.conf. You can google for apache performance to look for more answer. Cheers
10 More Discussions You Might Find Interesting
1. Red Hat
CPU usage: PS versus TOP - Different output
Hi
When monitoring a Linux environment with PS command, reported CPU value for a certain process differs, sometimes greatly, from the value seen in TOP.
I understood this is not a bug, they report different data.
I can't understand the nature... (4 Replies)
Discussion started by: liav
4 Replies
2. Ubuntu
I am running a Dell PE R815 with 4 x AMD 12 core CPUs with 128GB of RAM and a RAID 5 array of 6 SAS disks. This is an HPC application and is definitely CPU bound, however once I run 16 of these processes (thus pinning 16 cores) the work performed slows down dramatically, to maybe 5 or 10% of what... (2 Replies)
Discussion started by: mowmentous
2 Replies
3. AIX
Hi Guys,
I need to write a script capable of identifying when a high cpu utilitzation process. It sounds simple but we are on a AIX 5.3 environment with Virtual CPU's (VP's) and logical CPU's. Please any ideas or tips would be highly appreciated. Thanks.
Harby. (6 Replies)
Discussion started by: arizah
6 Replies
4. AIX
ibm tivoli monitor's kuxagent is taking up a lot of cpu usage.
anybody has any idea? i attatched a screenshot. (3 Replies)
Discussion started by: curtis911
3 Replies
5. Linux
Hi All,
Yesterday my Linux server went panic and even a small command took a lot of time to run.
When i monitored pl find the below output
Cpu(s): 0.1%us, 98.4%sy, 0.0%ni, 1.5%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
the time spent on kernel mode is 98 % and also idle time is around 1.5 %...... (4 Replies)
Discussion started by: jegaraman
4 Replies
6. AIX
Hi,
I can't seem to make sense of this. My wait time is showing really high but vmstat's and topas are showing normal usage.
ps aux
USER PID %CPU %MEM SZ RSS TTY STAT STIME TIME COMMAND
root 9961810 5680.7 0.0 448 384 - A Dec 16 6703072:12 wait
... (2 Replies)
Discussion started by: techy1
2 Replies
7. AIX
Dear All,
One production Server is affected by high usage.
Application is slow now. Please guide me how to solve it?
NMON Report shows full cpu usage.
Here im posting some server details.
bash-3.2# lparstat -i
Node Name : *********
Partition Name ... (6 Replies)
Discussion started by: Thala
6 Replies
8. Shell Programming and Scripting
I have created one script and i have added it into cron to run after 10 mins. However I have noted that whenever that script runs, It causes CPU utilization of server to increase about 10-20 %
I have rechecked script and there is no way i can make changes, Script contain only 2-3 commands. So... (4 Replies)
Discussion started by: Nakul_sh
4 Replies
9. Solaris
HI
In my M5000 , one of domain is having SAp installed. from today onwards we are facing some stange issue.
when we start SAP application, that particular user is taking 95 % of system CP and renaming 5 % is taken by system . because of this reason application is slow.
i have 4 CPU(32... (4 Replies)
Discussion started by: bentech4u
4 Replies
10. UNIX for Advanced & Expert Users
Hi Fellas,
Not sure how I can dig in even further but we notice that one of our DB servers is showing high Sys% CPU usage even though when I execute the following command :
I can see that postgres is the only one using the CPU. So if anyone can advise me what would be the best way to... (3 Replies)
Discussion started by: arizah
3 Replies
HTTPD(8) httpd HTTPD(8)
NAME
httpd - Apache Hypertext Transfer Protocol Server
SYNOPSIS
httpd [ -d serverroot ] [ -f config ] [ -C directive ] [ -c directive ] [ -D parameter ] [ -e level ] [ -E file ] [ -k start|restart|grace-
ful|stop|graceful-stop ] [ -h ] [ -l ] [ -L ] [ -S ] [ -t ] [ -v ] [ -V ] [ -X ] [ -M ] [ -T ]
On Windows systems, the following additional arguments are available:
httpd [ -k install|config|uninstall ] [ -n name ] [ -w ]
SUMMARY
httpd is the Apache HyperText Transfer Protocol (HTTP) server program. It is designed to be run as a standalone daemon process. When used
like this it will create a pool of child processes or threads to handle requests.
In general, httpd should not be invoked directly, but rather should be invoked via apachectl on Unix-based systems or as a service on Win-
dows NT, 2000 and XP and as a console application on Windows 9x and ME.
OPTIONS
-d serverroot
Set the initial value for the ServerRoot directive to serverroot. This can be overridden by the ServerRoot directive in the configu-
ration file. The default is /usr.
-f config
Uses the directives in the file config on startup. If config does not begin with a /, then it is taken to be a path relative to the
ServerRoot. The default is /etc/apache2/httpd.conf.
-k start|restart|graceful|stop|graceful-stop
Signals httpd to start, restart, or stop. See Stopping Apache httpd for more information.
-C directive
Process the configuration directive before reading config files.
-c directive
Process the configuration directive after reading config files.
-D parameter
Sets a configuration parameter which can be used with <IfDefine> sections in the configuration files to conditionally skip or
process commands at server startup and restart. Also can be used to set certain less-common startup parameters including -DNO_DETACH
(prevent the parent from forking) and -DFOREGROUND (prevent the parent from calling setsid() et al).
-e level
Sets the LogLevel to level during server startup. This is useful for temporarily increasing the verbosity of the error messages to
find problems during startup.
-E file
Send error messages during server startup to file.
-h Output a short summary of available command line options.
-l Output a list of modules compiled into the server. This will not list dynamically loaded modules included using the LoadModule
directive.
-L Output a list of directives provided by static modules, together with expected arguments and places where the directive is valid.
Directives provided by shared modules are not listed.
-M Dump a list of loaded Static and Shared Modules.
-S Show the settings as parsed from the config file (currently only shows the virtualhost settings).
-T (Available in 2.3.8 and later)
Skip document root check at startup/restart.
-t Run syntax tests for configuration files only. The program immediately exits after these syntax parsing tests with either a return
code of 0 (Syntax OK) or return code not equal to 0 (Syntax Error). If -D DUMP_VHOSTS is also set, details of the virtual host con-
figuration will be printed. If -D DUMP_MODULES is set, all loaded modules will be printed.
-v Print the version of httpd, and then exit.
-V Print the version and build parameters of httpd, and then exit.
-X Run httpd in debug mode. Only one worker will be started and the server will not detach from the console.
The following arguments are available only on the Windows platform:
-k install|config|uninstall
Install Apache httpd as a Windows NT service; change startup options for the Apache httpd service; and uninstall the Apache httpd
service.
-n name
The name of the Apache httpd service to signal.
-w Keep the console window open on error so that the error message can be read.
Apache HTTP Server 2018-07-06 HTTPD(8)