JavaScript is disabled by your browser. Many features will not work.Website Acceleration - Apache Caching
A website can be made faster by accelerating the delivery system. That can be accomplished by caching elements of the website in the server memory.
Enable the four following Apache modules and restart Apache:
You will then need to add directives to your apache2.conf file (for global) or virtual host file (for a specific website).
Here are the directives I added to my webtracker.one-le-ssl.conf host file - the code goes beneath the IfModule and VirtualHost starting lines:
Note: My intent is to primarily cache image files. I do not want to cache html or css because I change them frequently. Further, the caching system was sometimes providing the desktop user with a mobile css file and the phone user with a desktop css file.
CacheQuickHandler off
CacheRoot '/var/cache/apache2/mod_cache_disk'
CacheLock on
CacheLockPath /tmp/mod_cache-lock
CacheLockMaxAge 5
CacheDirLevels 4
CacheDirLength 5
CacheIgnoreHeaders Set-Cookie
CacheIgnoreNoLastMod On
CacheIgnoreCacheControl On
CacheDisable /login.php #any file that you specifically do not want cached
<Location />
CacheEnable disk
CacheHeader on
CacheDefaultExpire 600
CacheMaxExpire 86400
CacheLastModifiedFactor 0.5
ExpiresActive on
ExpiresByType text/html 'access plus 0 seconds'
ExpiresByType text/css 'access plus 0 seconds'
ExpiresByType image/gif 'access plus 1 year'
ExpiresByType image/jpg 'access plus 1 year'
ExpiresByType image/jpeg 'access plus 1 year'
ExpiresByType image/png 'access plus 1 year'
ExpiresByType image/webp 'access plus 1 year'
ExpiresByType text/javascript 'access plus 30 days'
ExpiresByType application/javascript 'access plus 30 days'
ExpiresByType application/x-javascript 'access plus 30 days'
ExpiresByType video/mp4 'access plus 1 year'
Header merge Cache-Control public
FileETag All
</Location>
If you want more information on what these settings mean, here are available resources:
ServerLab.ca
IBM
Digital Ocean
If you wish to enable logging, add the following line to your apache2.conf file or virtual host file:
And add the following line to your apache2.conf file (you can modify the line as you wish):
After this, restart Apache.
You will then be able to see caching activity by entering the following command:
Enable the four following Apache modules and restart Apache:
sudo a2enmod cache
sudo a2enmod cache_disk
sudo a2enmod expires
sudo a2enmod headers
sudo systemctl restart apache2
sudo a2enmod cache_disk
sudo a2enmod expires
sudo a2enmod headers
sudo systemctl restart apache2
You will then need to add directives to your apache2.conf file (for global) or virtual host file (for a specific website).
Here are the directives I added to my webtracker.one-le-ssl.conf host file - the code goes beneath the IfModule and VirtualHost starting lines:
Note: My intent is to primarily cache image files. I do not want to cache html or css because I change them frequently. Further, the caching system was sometimes providing the desktop user with a mobile css file and the phone user with a desktop css file.
If you want more information on what these settings mean, here are available resources:
ServerLab.ca
IBM
Digital Ocean
If you wish to enable logging, add the following line to your apache2.conf file or virtual host file:
CustomLog /var/log/apache2/cache.log cachelog
And add the following line to your apache2.conf file (you can modify the line as you wish):
LogFormat '%a %v:%p %t %r %{cache-status}e %>s ' cachelog
After this, restart Apache.
sudo systemctl restart apache2
You will then be able to see caching activity by entering the following command:
sudo tail -f /var/log/apache2/cache.log
* posted by Robert on Fri, Sep 02, 2022