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List of frequently used apache directives

My name is Nakagawa from the System Solutions Department.
currently studying for
the LPIC202 exam In particular, I am enthusiastically working on the basic settings of Apache included in "Theme 208: HTTP Service",
as this is related to server construction and troubleshooting.
We have summarized the frequently touched apache configuration items (directives).

・apache configuration file

The apache configuration file name and installation location differ depending on the OS.

CentOS・RHEL・Fedora /etc/httpd/conf/
SUSE・Debian・MacOS /etc/apache2/
sauce /usr/local/apache2/conf/

The directories introduced here are just likely to contain configuration files, so
if you can't find them, try searching using the find command.

・Apache directives

Directives are used to give instructions or specifications to a program.
Settings can be added or edited by writing special instructions in the file.
The following directives need to be modified when building the server.

directive name Setting details
Timeout Number of seconds from receiving a request to completing processing
Keep Alive Enabling/disabling multiple request processing in one TCP connection
MaxKeepAliveRequests Maximum number of requests in one TCP connection when KeepAlive is enabled
KeepAliveTimeout Maximum waiting time for one TCP connection when KeepAlive is enabled
Options Set available features for directories

The directives regarding apache child processes (processes started by other processes) are as follows.

directive name Setting details
StartServers Number of child processes created at startup
MinSpareServers Minimum number of child processes to wait
MaxSpareServers Maximum number of child processes to wait
MaxClients Upper limit for child processes spawned
MaxRequestsPerChild Number of requests that a child process can handle

checking the settings for child processes (processes started by other processes) when the server load is high,
or by modifying the values ​​in consideration of the apache access status and server processing performance. Masu.

lastly

This is my second year at the company, and when dealing with alerts that occur daily on each web server,
I can determine the cause based on my past experience, but I am
not very good at investigating the root cause. In terms of finding measures to prevent recurrence, there are many things that I feel are lacking.

you understand the load, basic performance, and configuration status of each server and
take fundamental measures.

This time we only picked up a limited number of apache directives, but
next time we will also look into middleware other than apache.

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[Osaka/Yokohama] Actively recruiting infrastructure engineers and server side engineers!

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The person who wrote this article

About the author

Sakina Nakagawa

I joined the company in 2016 as a new graduate. Lately, I've been having fun learning the basics of servers.