Vinay Vengala

Setting up isolated multisite WordPress environments on RHEL 9 using Nginx map directive virtual hosts configuration

Prerequisites and Initial Setup This guide assumes a fresh RHEL 9 installation with root or sudo privileges. We’ll be setting up a robust, isolated multisite WordPress environment leveraging Nginx’s powerful `map` directive for efficient virtual host routing. This approach is highly scalable and simplifies management compared to traditional per-site Nginx configuration files. Ensure the following […]

Troubleshooting WordPress wp_cron execution failures on Rocky Linux 9: Setting up native systemd-timer cron schedules

Diagnosing wp_cron Failures WordPress’s built-in scheduler, wp_cron, is a critical component for tasks like publishing scheduled posts, checking for updates, and running various plugin/theme hooks. When wp_cron fails to execute reliably, it can lead to a cascade of operational issues. Common symptoms include scheduled posts not publishing, plugin notifications not appearing, and general site sluggishness […]

Upgrading legacy PHP 7.4 WordPress child themes to PHP 8.3: Fixing typing errors, warnings, and deprecated hooks

Assessing the PHP 8.3 Upgrade Impact on WordPress Child Themes Migrating a WordPress environment from PHP 7.4 to PHP 8.3, especially when dealing with custom child themes, necessitates a thorough review of theme code. PHP 8.x introduced stricter type checking, new features, and deprecated older functionalities. Child themes, often built incrementally over time, can accumulate […]

Configuring MariaDB Query Cache vs. InnoDB Buffer Pool Allocation on Debian 12 Bookworm for 10k daily WordPress posts

MariaDB Query Cache Deprecation and InnoDB Buffer Pool Tuning As of MariaDB 10.0, the Query Cache has been deprecated and removed entirely in MariaDB 10.5. For WordPress sites on Debian 12 Bookworm running MariaDB, relying on the Query Cache for performance optimization is a relic of the past. The focus must shift entirely to the […]

Tuning Nginx fastcgi_cache and Redis object cache on Ubuntu 24.04 LTS for high-traffic WooCommerce Stores

Nginx FastCGI Cache Configuration for WooCommerce Optimizing Nginx’s FastCGI cache is paramount for high-traffic WooCommerce stores. This involves carefully tuning cache zones, key generation, and cache purging strategies to minimize database load and accelerate page delivery. We’ll focus on Ubuntu 24.04 LTS, assuming a standard LEMP stack with PHP-FPM. Defining Cache Zones and Parameters The […]

Installing and Configuring HAProxy as a Load Balancer for Magento 2 Nginx Backends on openSUSE Leap 15.5

Prerequisites and System Setup This guide assumes a functional openSUSE Leap 15.5 installation with root or sudo privileges. We will be setting up HAProxy to distribute traffic across multiple Nginx instances serving Magento 2. Ensure your Nginx servers are already configured and accessible on a specific port (e.g., 8080) for the backend Magento 2 applications. […]

Troubleshooting MariaDB memory pool leaks on openSUSE Leap 15.5: Diagnosingjemalloc vs glibc allocator limits

Identifying the Memory Leak: Initial Observations and Tools When encountering persistent memory growth in MariaDB instances running on openSUSE Leap 15.5, particularly after recent upgrades or configuration changes, a systematic diagnostic approach is paramount. The first step involves confirming the leak and gathering baseline metrics. Tools like top, htop, and ps are invaluable for real-time […]

Upgrading Perl 5.34 to 5.38 on openSUSE Leap 15.5: Recompiling Custom CPAN XS Modules without Segfaults

Assessing the Perl Upgrade Landscape on openSUSE Leap 15.5 Enterprise environments often rely on specific Perl versions for critical applications. Upgrading Perl on a stable distribution like openSUSE Leap 15.5, particularly from 5.34 to 5.38, necessitates a meticulous approach, especially when dealing with custom-compiled CPAN modules that link against system libraries or have C/C++ extensions […]

Tuning Kernel Sysctl VM Virtual Memory parameters (dirty_ratio/dirty_background_ratio) on openSUSE Tumbleweed

Understanding `dirty_ratio` and `dirty_background_ratio` On Linux systems, the virtual memory subsystem manages how data is written from RAM to persistent storage. A critical aspect of this management involves the concept of “dirty” pages. A page is considered dirty when it has been modified in memory but has not yet been written back to its underlying […]

Installing and Configuring Supervisor on openSUSE Leap 15.5 to Daemonize Long-Running Python Queue Workers

Prerequisites and Initial Setup This guide assumes you have a fresh installation of openSUSE Leap 15.5 with root or sudo privileges. We’ll be installing Supervisor, a process control system that allows you to monitor and control a number of processes on UNIX-like operating systems. This is particularly useful for daemonizing long-running applications like Python-based message […]

Vinay Vengala

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