How do I enable MVCC in my Turso environment?

MVCC is enabled at runtime using the SQL command 'PRAGMA journal_mode = experimental_mvcc;'. It is a per-database setting.

Is the Turso MVCC feature production-ready?

No, it is currently an experimental work-in-progress feature meant for development and testing. It lacks critical features like garbage collection and recovery from restart.

What is the difference between WAL and MVCC in Turso?

Standard WAL uses page-level snapshot isolation where every commit writes full pages. MVCC uses row-level versioning, writing only affected rows to a logical log (.db-log).

Does this skill help with standard database debugging?

This skill is specifically for MVCC-related logic. You should generally ignore MVCC details when debugging standard Turso or SQLite issues unless the bug is specific to the experimental MVCC mode.

Turso MVCC Internals Guide

Name: Turso MVCC Internals Guide
Author: tursodatabase

bytursodatabase

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17,108

데이터베이스 관리

Explains and navigates Turso's experimental Multi-Version Concurrency Control (MVCC) architecture and snapshot isolation features.

소개

This skill provides deep technical expertise regarding Turso's experimental Multi-Version Concurrency Control (MVCC) implementation. It assists developers in understanding row-level versioning, snapshot isolation, and the internal architecture of the mv_store, including its use of lock-free skipmaps and logical logging. By providing context on the core implementation files and current limitations—such as checkpointing behavior and memory usage—this skill helps contributors and power users debug MVCC-specific issues and explore high-concurrency database patterns within the Turso ecosystem.

주요 기능

Technical comparison between standard WAL and experimental MVCC modes
Deep-dive analysis of row-level versioning and snapshot isolation logic
Guidance on navigating the core/mvcc codebase and key implementation files
Explanation of logical log structures and the CheckpointStateMachine
17,108 GitHub stars
Support for identifying and debugging MVCC-specific data anomalies

사용 사례

Contributing to the development of Turso's persistent storage engine
Learning about lock-free database architectures and row-level isolation
Debugging concurrency issues during experimental MVCC testing

소개

주요 기능

Technical comparison between standard WAL and experimental MVCC modes
Deep-dive analysis of row-level versioning and snapshot isolation logic
Guidance on navigating the core/mvcc codebase and key implementation files
Explanation of logical log structures and the CheckpointStateMachine
17,108 GitHub stars
Support for identifying and debugging MVCC-specific data anomalies

사용 사례

Contributing to the development of Turso's persistent storage engine
Learning about lock-free database architectures and row-level isolation
Debugging concurrency issues during experimental MVCC testing