Postman Timed Out, but Kafka Was Still Receiving Jobs
Postman timed out while Spring Boot kept sending Kafka jobs. See how SSE progress, idempotency, and async boundaries fixed it.
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Why the Same Monthly Report Keeps Showing Different Numbers
Backend reporting lesson on summary tables, mutable transactions, report snapshots, data lineage, and reproducible monthly totals.
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Fixing This Month’s Report Shouldn’t Break Last Month’s
A production lesson on reporting database migrations, historical data paths, and checks that prevent broken monthly reports today.
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Async Was Slower Than Sync in This Spring Boot Load Test
A Spring Boot load test where async handled requests slower than sync. Compare latency, throughput, and thread behavior.
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Redis Made This Spring Boot API 30x Faster in a Load Test
Tested Redis caching in a Spring Boot API and achieved up to 30x faster response times. See benchmarks, P95 impact, and key insights.
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Microservices vs Monolith Performance: Latency Trade-offs We Measured
Exploring performance trade-offs between microservices and monolith architectures, including network latency, and complexity.
Microservices vs Monolith Performance: Latency Trade-offs We Measured Read More »
Spring Boot Saturation Test: Why 300 Users Caused 42% Failures
Load testing Spring Boot defaults at 300 concurrent users reveals connection pool saturation and 42% request failures.
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Spring Boot Redis Benchmark: When Caching Made Latency Worse
Benchmarking Redis caching with 100 users on 10M rows. Proper config improved 15× — bad config caused unstable latency.
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Kafka Lag vs PostgreSQL Writes: What Slowed the Consumer Down
Real Kafka lag benchmark with payload growth and PostgreSQL indexing impact. Measured drain time and throughput.
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Java Map Performance: HashMap, LinkedHashMap, and TreeMap Trade-offs
Explore Java Maps in this practical guide. Learn how to use key-value pairs efficiently with examples, tips, and advanced techniques.
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