Having 9+ Years of Experience in Software Development
Proactive Health Checks for Ruby Applications on EC2 Maintaining the health of Ruby 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 CloudWatch and application-level tools. 1. Application Process […]
Understanding the Linux OOM Killer The Out-Of-Memory (OOM) Killer is a crucial component of the Linux kernel designed to prevent a system from crashing entirely when it runs out of available memory. When the system reaches a critical memory shortage, the OOM Killer is invoked to reclaim memory by terminating one or more processes. This […]
Tuning PHP-FPM `pm.max_children` and Memory Limits In large-scale PHP applications, particularly those serving high traffic volumes and complex functionalities, memory consumption by PHP-FPM child processes can become a significant bottleneck. Uncontrolled memory usage can lead to OOM (Out Of Memory) killer interventions, slow response times, and increased infrastructure costs. This document details advanced strategies for […]
Identifying the Root Cause: Indexing Lock Conflicts and High CPU When performing bulk stock updates on AWS-hosted applications, particularly those relying on relational databases like MySQL or PostgreSQL, a common symptom is a dramatic spike in CPU utilization, often accompanied by slow response times or even application unresponsiveness. This behavior is frequently a direct consequence […]
Diagnosing OOM Killer Invocation on PHP-FPM Workers The Linux Out-Of-Memory (OOM) Killer is a critical system process designed to reclaim memory when the system is under severe pressure. While essential for preventing a complete system freeze, its indiscriminate termination of PHP-FPM worker processes in a Magento 2 environment, especially older, less optimized codebases, can lead […]
Understanding XXE in Legacy SOAP Integrations XML External Entity (XXE) injection remains a persistent threat, particularly in older systems that rely on XML-based communication protocols like SOAP. When integrating legacy SOAP services into modern C++ applications, developers often encounter XML parsers that are not configured with security best practices. This oversight can expose the application […]
Proactive MongoDB Cluster Health Checks with `mongosh` and `cron` Maintaining the health of a distributed MongoDB cluster, especially on a cloud platform like OVH, requires more than just reactive alerts. Proactive, automated checks are crucial for identifying potential issues before they impact application performance or availability. This section details a robust approach using the `mongosh` […]
OVHcloud Infrastructure for Magento 2: A Cost-Optimized HA Architecture This document outlines a high-availability (HA) and cost-optimized Magento 2 architecture leveraging OVHcloud’s infrastructure. The focus is on achieving resilience and performance without incurring the premium costs often associated with managed cloud providers. We’ll detail the server roles, network configuration, database setup, caching strategies, and essential […]
Nginx as a High-Performance Frontend for WordPress When deploying WordPress on Google Cloud, Nginx serves as an excellent choice for a frontend web server. Its event-driven, asynchronous architecture excels at handling a high volume of concurrent connections, making it ideal for serving static assets and proxying dynamic requests to your application backend. The key to […]
Understanding Elasticsearch Performance with Shopify Data Shopify stores, especially those with large product catalogs, high traffic, or complex filtering requirements, often find their Elasticsearch clusters becoming a performance bottleneck. This isn’t typically due to Elasticsearch’s inherent limitations, but rather suboptimal query design and indexing strategies tailored to the unique data structures and access patterns of […]