Database terms

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🗄️ Where your data lives, breathes, and occasionally panics

Almost every application is, at its core, a system for reading and writing data. This category covers relational and non-relational databases, query optimisation, indexing strategies, transactions, normalisation, replication, and the CAP theorem trade-offs that dictate how distributed data behaves. Choosing and using the right database correctly is one of the highest-leverage skills in backend development.

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PostgreSQL VACUUM & ANALYZE PHP 5.0+

VACUUM reclaims storage from dead tuples created by MVCC updates and deletes. ANALYZE updates query planner statistics. Both are essential for PostgreSQL performance.

2mo ago database advanced

Diagram: Pessimistic vs Optimistic Locking

Pessimistic vs Optimistic Locking PHP 5.0+

Pessimistic locking acquires a database lock upfront preventing conflicts. Optimistic locking detects conflicts at write time using a version column — trading lock overhead for conflict detection.

2mo ago database advanced