Resolving the Database is Locked Error in SQLite3 with Python and Django
Resolving the Database is Locked Error in SQLite3 with Python and Django
The "Database is Locked" error in SQLite3, common in Python/Django applications, typically stems from concurrent access or prolonged transactions. To resolve this, a key step is increasing the connection timeout. In Python's `sqlite3` module, pass a `timeout` parameter (seconds) to `sqlite3.connect()`. For Django, modify your `DATABASES` setting by adding `'OPTIONS': {'timeout': 10}` (or appropriate value) to your SQLite configuration. This allows queries to wait for lock release instead of immediate failure. Furthermore, ensure your application properly closes connections and commits/rolls back transactions promptly to minimize lock durations. For better concurrency, particularly with multiple readers/writers, enable Write-Ahead Logging (WAL) mode by executing `PRAGMA journal_mode=WAL;` on your database. WAL separates writers from readers, significantly reducing contention. Implementing retry logic for transient locks also enhances application resilience.
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