OPcache is a PHP module used for caching pre-compiled script bytecode in the shared memory. It can speed up your website up to 3 times.
Whether you are running a simple blog, a complex web application, or an e-commerce site, Opcache can significantly enhance your application’s responsiveness by eliminating the need for repetitive PHP script compilation.
Opcache stores pre-compiled bytecode in shared memory, allowing PHP to skip the compilation step and execute code directly from memory.
This will result in dramatically reduced response times and an overall improvement in the performance of your PHP-powered website.
Table of Contents
- A server with Ubuntu 22.04 as OS
- User privileges: root or non-root user with sudo privileges
Step 1. Update the System
Log in to the Server & Update the Server OS Packages
First, log in to your Ubuntu 22.04 server via SSH as the root user:
ssh root@IP_Address -p Port_number
You will need to replace ‘IP_Address’ and ‘Port_number’ with your server’s respective IP address and SSH port number. Additionally, replace ‘root’ with the username of the admin account if necessary.
Before starting, you have to make sure that all Ubuntu OS packages installed on the server are up to date. You can do this by running the following commands:
apt-get update -y apt-get upgrade -y
Step 2. Install and Configure PHP OPcache with Apache
In this section, we will show you how to install PHP OPcache and enable it for the Apache web server.
First, you will need to install Apache, PHP, and other PHP extensions on your server. You can install them with the following command:
apt-get install apache2 libapache2-mod-php php php-cli php-opcache php-mysql php-zip php-gd php-mbstring php-curl php-xml -y
Once all the packages are installed, verify the PHP version with the following command:
You should get the following output:
PHP 8.1.2-1ubuntu2.13 (cli) (built: Jun 28 2023 14:01:49) (NTS) Copyright (c) The PHP Group Zend Engine v4.1.2, Copyright (c) Zend Technologies with Zend OPcache v8.1.2-1ubuntu2.13, Copyright (c), by Zend Technologies
Next, you will need to enable the PHP OPcache by editing php.ini file.
Uncomment the following lines:
opcache.enable=1 opcache.memory_consumption=128 opcache.max_accelerated_files=10000 opcache.revalidate_freq=200
Save and close the file, then restart the Apache service to apply the changes:
systemctl restart apache2
You can now verify the PHP OPcache installation with the following command:
php -i | grep opcache
You should get the following output:
… opcache.file_cache_consistency_checks => On => On opcache.file_cache_only => Off => Off opcache.file_update_protection => 2 => 2 opcache.force_restart_timeout => 180 => 180 opcache.huge_code_pages => Off => Off opcache.interned_strings_buffer => 8 => 8 opcache.jit => tracing => tracing opcache.jit_bisect_limit => 0 => 0 opcache.jit_blacklist_root_trace => 16 => 16 opcache.jit_blacklist_side_trace => 8 => 8 opcache.jit_buffer_size => 0 => 0 opcache.jit_debug => 0 => 0 opcache.jit_hot_func => 127 => 127 opcache.jit_hot_loop => 64 => 64 opcache.jit_hot_return => 8 => 8 opcache.jit_hot_side_exit => 8 => 8 opcache.jit_max_exit_counters => 8192 => 8192 …
Step 3. Configure PHP OPCache on NGINX
To install and enable the Opcache PHP module on your server running with Nginx.
First, you will install the Opcache extension with the following command:
apt-get install php-opcache php-fpm -y
Then you can enable the Opcache extension in the php.ini file and open the php.ini file with your favorite editor.
And change the following lines for the best performance.
opcache.enable=1 opcache.memory_consumption=128 opcache.max_accelerated_files=3000 opcache.revalidate_freq=200
Then go ahead and save the file and restart the NGINX and php-fpm services to apply the changes.
systemctl restart nginx systemctl restart php8.1-fpm
That was all. You successfully installed and enabled OPcache on Ubuntu 22.04.
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