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Locking, Savepoints, and In-Memory Databases in SQLite

DEV Community·Athreya aka Maneshwar·about 1 month ago
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Hello, I'm Maneshwar. I'm building git-lrc, an AI code reviewer that runs on every commit. It is free, unlimited, and source-available on Github. Star Us to help devs discover the project. Do give it a try and share your feedback for improving the product. As we go deeper into SQLite, things start getting less about syntax and more about how the database behaves under real workloads . Features like triggers and autovacuum shape behavior internally, but now we’re stepping into how SQLite handles concurrency, transactions, and performance tradeoffs . This is where concepts like table-level locking (or the lack of it), savepoints, and in-memory databases become important. Table-Level Locking (Or Why SQLite Feels Different) One of the most important things to understand about SQLite is this: SQLite does not support table-level locking It uses file-level locking instead This means the entire database file is treated as a single unit when it comes to locking.…

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