Tech

Technical articles on backend, databases and the web.

• A Backend Dev's Performance Tuning in Practice (1): Observing the Problem

  Published: 7 Jul, 2026 |  at  08:00 AM

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  You say there's a problem, so there's a problem? Says who, you baka.

• The Buffer Pool and MySQL's Query Cache

  Published: 6 Jul, 2026 |  at  08:00 AM

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  The database has caches of its own. A look at the Buffer Pool — still indispensable today — and the Query Cache, which once existed but was finally removed in MySQL 8.0.

• What Is Hibernate's Second-Level Cache?

  Published: 5 Jul, 2026 |  at  08:00 AM

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  What is the second-level cache? How do you use it? And why do we rarely hear about it these days?

• How Does a Domain Name Actually Reach Your Server?

  Published: 10 May, 2026 |  at  05:30 PM

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  A walkthrough of DNS — from browser cache to Authoritative Name Server.