Having 9+ Years of Experience in Software Development
Diagnosing PHP-FPM Child Process Memory Bloat One of the most insidious problems in high-traffic PHP applications is the gradual increase in memory consumption by PHP-FPM child processes. This isn’t always a straightforward memory leak in your PHP code; often, it’s a combination of factors including opcode caching, session handling, and the inherent nature of long-running […]
Elasticsearch Cluster Architecture for High Availability Achieving robust disaster recovery for Elasticsearch hinges on a well-architected cluster that inherently supports high availability. This means moving beyond a single-node or simple master/data node setup to a distributed system with redundancy at every critical layer. For production deployments on AWS, we leverage multiple Availability Zones (AZs) to […]
Nginx as a High-Performance Frontend for Perl Applications When deploying Perl applications, especially those leveraging modern frameworks like Mojolicious or Dancer, Nginx serves as an exceptionally robust and performant frontend. Its strengths lie in efficient static file serving, SSL termination, request buffering, and load balancing. For Perl applications, Nginx typically acts as a reverse proxy […]
Server Hardening: Linode Instance Baseline Before diving into WooCommerce-specific configurations, a robust server baseline is paramount. This checklist assumes a fresh Linode instance, typically running Ubuntu LTS. We’ll focus on essential security measures that form the bedrock of a secure e-commerce environment. 1. SSH Access Control Disable root login and password authentication. Enforce key-based authentication […]
Identifying Thread Pool Saturation with `strace` When diagnosing deadlocks in concurrent ActiveRecord transaction processing, especially on cloud infrastructure like Google Cloud, thread pool saturation is a prime suspect. This often manifests as requests hanging indefinitely, with no clear errors in application logs. A powerful, low-level tool to inspect this is strace. By attaching strace to […]
Leveraging AWS RDS for PostgreSQL High Availability For mission-critical PostgreSQL deployments, Amazon RDS offers a robust, managed solution for high availability (HA) and automated failover. The core of this strategy lies in RDS Multi-AZ deployments. When configured, RDS automatically provisions and maintains a synchronous standby replica in a different Availability Zone (AZ) within the same […]
Proactive Health Checks for Python Applications on EC2 Maintaining the health of Python applications deployed on AWS EC2 instances requires a multi-layered approach to monitoring. Beyond basic CPU and memory utilization, we need to inspect application-specific metrics and ensure critical processes are running. This involves leveraging both AWS native tools and custom instrumentation. A fundamental […]
Proactive Perl Application Health Checks Maintaining the stability of Perl applications, especially those handling critical data like those interacting with DynamoDB, requires more than just basic process monitoring. We need to implement application-level health checks that go beyond simply verifying if the Perl interpreter is running. This involves crafting specific checks that validate the application’s […]
Establishing a Highly Available Redis Cluster on DigitalOcean Achieving automated failover for Redis, a critical in-memory data store, requires a robust architecture that goes beyond simple replication. We’ll focus on a Redis Sentinel-based setup, which provides high availability by monitoring Redis instances and orchestrating automatic failovers when a master node becomes unavailable. This setup will […]
Strategic Decomposition: Identifying Bounded Contexts in Rails 4.x The initial, and arguably most critical, step in refactoring a monolithic Rails 4.x application into microservices is the precise identification of Bounded Contexts. This isn’t merely about extracting loosely coupled modules; it’s about defining clear boundaries where a specific domain model is consistent and authoritative. For a […]