Use case
Scalable Load Testing for Enhanced Application Stability
- Vishalkumar Chaurasia
About the Customer
InvoTech is an organization that provides a comprehensive Billing application platform offering seamless billing services for a variety of organizations. InvoTech delivers its billing application as an open-source service, allowing users to manage their business finances effectively. Additionally, it offers custom plugins tailored specifically for clients’ needs, enhancing functionality beyond standard offerings. InvoTech integrates with several open-source applications, such as N8N, CRM, SFTPGO, and Metabase, to create real-time connections between clients’ applications and its billing platform.
Customer Challenge
The InvoTech application was potentially facing server capacity issues under varying load conditions. The default configuration could have been insufficient to manage peak loads, which might result in scalability and performance bottlenecks, as well as non-compliance with the application’s performance service level agreements (SLAs).
The primary risks included degraded user experience due to slow response times, system downtime during high usage periods, and increased operational costs due to inefficiencies. Without addressing these challenges, the system would struggle to meet both its scalability and performance objectives, risking potential loss of customers and reputation.
Solution
The IAMOPS team approached this challenge by implementing a robust load testing strategy on the InvoTech application. The solution included optimizing both server configurations and application behavior under load. Key actions taken included:
- Updated PHP FPM Configuration: Adjusted PHP FPM settings to handle higher loads, reducing latency and optimizing server response.
- Updated Nginx Configuration: Enhanced the timeout settings to improve application response during peak periods.
- Added Taints and Tolerations: Configured Kubernetes to better manage resource allocation by deploying specific resources where they were most needed.
- Increased Billing VM Storage and Memory: Expanded storage to 400 GB and memory using t2d machines, deployed across multiple nodes in different zones to ensure redundancy.
- Utilized Spot Machines for N8N Nodes: Deployed on cost-effective spot instances to optimize costs without compromising performance.
- Updated N8N Execution Mode and Concurrency: Configured N8N to operate in queue mode and optimized concurrency settings for efficient processing.
- Automated Log Management: Implemented CronJobs for log truncation to prevent storage issues and maintain system performance.
- Updated Horizontal Pod Autoscaler (HPA) Settings: Adjusted the HPA settings to dynamically manage load, ensuring optimal resource usage.

Semantic Release Workflow
Results & Benefits
The solution delivered several significant improvements, both qualitative and quantitative. Key results included:
- Enhanced Scalability: The application was successfully scaled across multiple nodes, ensuring uptime and responsiveness even during peak loads.
- Improved Performance: Optimization of PHP FPM and Nginx configurations resulted in reduced latency and increased throughput.
- Cost Optimization: Utilization of spot instances for N8N nodes led to significant cost savings.
- Enhanced User Experience: Users experienced improved application responsiveness, increasing overall satisfaction.
- Reliable Compliance: The solution ensured that the infrastructure remained compliant with all performance SLAs.
About IAMOPS
IAMOPS is a full DevOps suite company that supports technology companies to achieve intense production readiness.
Our mission is to ensure that our clients’ infrastructure and CI/CD pipelines are scalable, mitigate failure points, optimize performance, ensure uptime, and minimize costs.
Our DevOps suite includes DevOps Core, NOC 24/7, FinOps, QA Automation, and DevSecOps to accelerate overall exponential growth.
As an AWS Advanced Tier Partner and Reseller, we focus on two key pillars: Professionalism by adhering to best practices and utilizing advanced technologies, and Customer Experience with responsiveness, availability, clear project management, and transparency to provide an exceptional experience for our clients.