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EPISODE · May 31, 2026 · 9 MIN

Why Database Connection Pools Need Pool Tuning

from Database Tech with Fexingo: SQL, NoSQL, and Data Storage Conversations · host Fexingo

Lucas and Luna explain why a default-configured database connection pool can cause more problems than it solves. They walk through a real-world case: a mid-sized e-commerce platform whose connection pool size was set to 200 connections per app instance, triggering database CPU thrashing and query timeouts during a flash sale. They break down the math behind the 'pool size = max throughput' formula, discuss how PostgreSQL connection overhead scales non-linearly, and share a simple tuning heuristic — start at 2x the number of CPU cores and monitor queue depth. They also touch on why PgBouncer's transaction-level pooling changes the calculus. No abstract advice: concrete numbers, a specific failure mode, and a fix you can apply. #DatabaseConnectionPooling #PostgreSQL #PgBouncer #ConnectionPoolTuning #DatabasePerformance #Backpressure #Threading #DatabaseCPUThrashing #QueryTimeout #EcommercePlatform #FlashSale #QueueDepth #PoolSizeFormula #TransactionLevelPooling #Technology #DataEngineering #FexingoBusiness #BusinessPodcast Keep every episode free: buymeacoffee.com/fexingo

Episode metadata supplied by the publisher feed · Published May 31, 2026

What this episode covers

Lucas and Luna explain why a default-configured database connection pool can cause more problems than it solves. They walk through a real-world case: a mid-sized e-commerce platform whose connection pool size was set to 200 connections per app instance, triggering database CPU thrashing and query timeouts during a flash sale. They break down the math behind the 'pool size = max throughput' formula, discuss how PostgreSQL connection overhead scales non-linearly, and share a simple tuning heuristic — start at 2x the number of CPU cores and monitor queue depth. They also touch on why PgBouncer's transaction-level pooling changes the calculus. No abstract advice: concrete numbers, a specific failure mode, and a fix you can apply. #DatabaseConnectionPooling #PostgreSQL #PgBouncer #ConnectionPoolTuning #DatabasePerformance #Backpressure #Threading #DatabaseCPUThrashing #QueryTimeout #EcommercePlatform #FlashSale #QueueDepth #PoolSizeFormula #TransactionLevelPooling #Technology #DataEngineering #FexingoBusiness #BusinessPodcast Keep every episode free: buymeacoffee.com/fexingo

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Frequently Asked Questions

How long is this episode of Database Tech with Fexingo: SQL, NoSQL, and Data Storage Conversations?

This episode is 9 minutes long.

When was this Database Tech with Fexingo: SQL, NoSQL, and Data Storage Conversations episode published?

This episode was published on May 31, 2026.

What is this episode about?

Lucas and Luna explain why a default-configured database connection pool can cause more problems than it solves. They walk through a real-world case: a mid-sized e-commerce platform whose connection pool size was set to 200 connections per app...

Can I download this Database Tech with Fexingo: SQL, NoSQL, and Data Storage Conversations episode?

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