Solving Concurrent Session Issues in Claude Code: Implementing Memory MCP with WAL Mode
Published:Jan 1, 2026 08:55
•1 min read
•Zenn Claude
Analysis
The article describes a solution to the 'database is locked' error encountered when running concurrent sessions in Claude Code. The author implemented a Memory MCP (Memory Management and Communication Protocol) using SQLite's WAL (Write-Ahead Logging) mode to enable concurrent access and knowledge sharing between Claude Code sessions. The target audience is developers who use Claude Code.
Key Takeaways
Reference
“The article quotes the initial reaction to the error: "Error: database is locked... Honestly, at first I was like, 'Seriously?'"”