Guide to Load Testing Event-Driven Systems 2026
Load test event-driven systems by injecting events at the producer and measuring at the consumer: end-to-end latency, consumer lag, DLQ rate, duplicates.
Load Testing
Load testing guides explain what a performance test measures and how to read the result. You'll find what response time, throughput, hits per second, percentiles and standard deviation mean, how stress, spike, volume and disaster recovery tests differ, which metrics to watch during a run, and practical fixes such as gzip on NGINX for a site that slows under load.
48 articles
Optimize Database Connection Pools for Peak Performance
Size a database connection pool from the database's limits, then confirm it with a load test. Defaults and limits from HikariCP, PgBouncer and PostgreSQL docs.
Load Test Script Maintenance: What AI Can and Cannot Do
Load test scripts break when APIs, auth, dynamic values or data change. How to detect drift early, keep scripts in git, and what AI can and cannot do.
Effective Load Testing for SaaS Onboarding
Learn effective SaaS onboarding testing techniques to create load testing scenarios that enhance user experience and ensure smooth performance.
Configure OAuth2 Load Testing for APIs
Learn how to configure OAuth2 load testing for APIs to ensure secure and accurate performance under stress. Improve your API testing process today.
Challenges in IoT Load Testing & Solutions 2026
IoT load testing for MQTT and CoAP backends: connections, keepalive, reconnect storms and retained messages, plus the tools that can generate that load.
Cloud vs On-Premise Load Testing: 2026 Guide
Cloud or on-premise load testing? Answer five questions in order, then confirm with a two-run pilot. Links the startup, enterprise and monitoring guides.
Guide to Load Testing Multi-Tenant SaaS Applications (2026)
Load testing multi-tenant SaaS: model the tenant mix, test noisy neighbours and per-tenant rate limits, check data isolation, and read results per tenant.
Design Load Tests for Progressive Web Apps 2026
Design load tests for progressive web apps: what service workers hide from a load test, and how to test cold-cache visits, offline sync bursts and push sending.
Boosting E-Commerce Checkout Speed at Peak Load
How to keep checkout fast at peak load: measure each step, find the slow query or call, and test with a ramp that matches a sale. Includes a k6 sketch.
Scripted vs AI-Driven Load Testing: 2026 Insights
Explore scripted vs AI-driven load testing approaches. Learn strengths, limitations, and decision criteria for 2026 performance optimization.
Top 7 Network Protocols Every Tester Must Know in 2026
Seven protocols load testers meet in 2026 (HTTP/1.1, HTTP/2, HTTP/3, WebSocket, gRPC, MQTT, SQL), what a test measures for each, and which tools support them.
Identify and Fix Memory Leaks in Load Testing
How to find memory leaks in a load test: hold a steady load for hours, trend the heap left after each GC, diff two heap dumps, fix the reference and re-run.
Load Testing for Media Streaming Performance
How to load test a video streaming platform: what to simulate, how to model a live-event audience, a k6 sketch, and how to read the results.
What is Endurance Testing (Soak Testing)?
Endurance testing and soak testing are the same practice: normal load held for hours. What it catches, how long to run it, and how to read the trend.
What is Spike Testing in Performance Testing?
Spike testing applies traffic suddenly instead of ramping. Why autoscaling and cold caches fail in that window, and why recovery is half the test.
What is Volume Testing in Software Testing?
Volume testing increases the data a system holds rather than the user count. What it finds, how to run one, and how to read the curve it produces.
Running k6 at Scale: k6 OSS vs Grafana Cloud k6 vs LoadFocus
Three ways to run k6 at scale: self-hosted k6 with the k6 Operator, Grafana Cloud k6, or a managed platform, with the cost and effort of each.
News Analysis 2026: How AI Is Transforming Automated Load Testing for Peak Performance
AI in automated load testing today: drafting scripts, summarising results and where it falls short, plus how to run automated load tests in CI with gates.
How to Optimize Load Testing for Single Page Applications: A Practical Guide for 2026
An SPA does its work after the initial HTML, so HTTP-level tests miss most of it. Test the API calls the app makes, weighted the way the app makes them.
What are Virtual Users (VUs) in Load Testing? Definition + Examples
A virtual user simulates one person's session, pauses included. How VUs differ from requests per second, and why think time decides the ratio.
How to Create Realistic Load Testing Scenarios for E-Commerce Websites in 2026
Realistic e-commerce load testing: build the browse, search, cart and checkout mix from your funnel, give each shopper unique data and keep payments safe.
Rest Assured API Testing: Guide for Business Owners & DevOps
REST Assured is a Java library for functional API tests. Set up 6.2.0 with JUnit 5, run it against a public API, and see why it is no load tool.
Online API Tester: What It Is and Where It Stops
An online API tester sends HTTP requests from a browser. See what it does well, where CORS, private networks and secrets limit it, and when to use curl or k6.
What is Concurrency Testing in Software Testing?
Concurrency testing finds races, deadlocks and lost updates when operations overlap. Runnable Python demos with fixes, and how it differs from load testing.
Calculate concurrent users for load tests
Concurrent, simultaneous and active users are three different numbers, and mixing them invalidates the test.
What is the Hardest Part of Load/Performance Testing?
The hard part is realism: matching real user behaviour, data and think time.
Performance Testing Types: Key Benefits & Examples
Soak testing finds leaks that a short run cannot, and spike testing finds recovery behaviour. Pick the type from the risk you are trying to retire.
The Ultimate Guide to Enterprise Software Testing
Enterprise testing is dominated by integration and data, not by writing more unit tests.
From Slow to Superfast: How to Improve Your Website Speed in 10 Easy Steps
The biggest wins are usually images, requests and caching, in that order.
Quickly Establish a Performance Baseline: A Simple Guide for Immediate Results
A baseline turns future runs into comparisons instead of isolated numbers. Capture it on a stable build under representative load, then leave it alone.
Unlock the Secret to Effortlessly Overcoming Load Testing Obstacles!
The recurring obstacles are environment parity, test data and interpreting results. Most of them are planning problems rather than tooling problems.
Top 10 Lessons Learned in Load Testing This Year
Most lessons are about realism: data, think time and environment parity. A result nobody acts on is the same as not testing.
How Frontend Performance Testing Can Catapult Your Business to the Top
Backend metrics can look healthy while the page users see is still slow. Measure on a real device profile. Desktop numbers flatter almost every site.
How are Throughput and Response Time Related
Throughput and response time diverge under load: throughput plateaus while response time climbs. Report both. Either one alone can be made to look good.
How to Measure the Right Key Metrics During Performance Testing
The performance testing metrics worth tracking: response time percentiles, throughput, error rate, concurrency, and CPU, memory, disk, network and DB load.
Some websites are just too slow…
Users judge speed in the first couple of seconds, and most sites lose them there. Measure before assuming; the obvious culprit is often not the cause.
Why are Percentiles More Useful than Averages in Performance Testing
The 90th percentile is the response time 90% of requests stay at or under. Why p90, p95 and p99 beat the average in performance testing, with a worked example.
Understanding Standard Deviation in Performance Testing
Two runs with the same mean can behave completely differently, and this is how you tell. Pair it with percentiles rather than reporting either alone.
What is Disaster Recovery Testing in Software Testing?
A recovery plan that has never been executed is an assumption, not a plan. Test the restore, not just the backup; backups fail silently at restore time.
What is Stress Testing in Software Testing?
Stress testing pushes past expected load to find the breaking point and the failure mode. How the system recovers matters as much as where it broke.
Is My Email Campaign going to Bring my Website Down?
A campaign delivers its traffic in minutes, which is a spike rather than a load curve.
Understanding 500 Internal Server Errors in GET or POST Requests
Why a GET or POST request returns 500 Internal Server Error: a body the server cannot parse, missing headers or cookies, exhausted pools, and how to debug it.
Enable gzip compression on NGINX
gzip on NGINX is a few lines of config and usually the cheapest bandwidth win available.
Top 10 Performance Testing Tips and Tricks
Decide what you are measuring and why before configuring anything. Choose the metrics up front, or you will report whatever looks best afterwards.
UI and performance testing for UI heavy web applications – solutions
Combine a large HTTP load with a small number of real browser sessions. Watch client-side metrics, since the server can be fast while the page is not.
What is Throughput in Performance Testing? Definition + How to Measure
Throughput in performance testing is the number of requests a system completes per second. How to measure it in JMeter and k6, and read it with response time.
What is Response Time in Performance Testing?
Response time testing explained: what response time is, how to measure it, why p95 beats the average, and what a good response time is.
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