Concurrency LimitationsAdvanced
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sqlWhat are the concurrency limitations of SQLite?
Explanation & Concept
While SQLite supports multiple concurrent readers (especially in WAL mode), it supports **only one writer at any single instant in time**. If a second connection attempts to write while the database is locked, it must wait or fail with `SQLITE_BUSY`.
Setting `PRAGMA busy_timeout = 5000;` instructs SQLite to sleep and retry for up to 5 seconds before failing.
Code Example
sql
-- Set busy timeout to 5000 milliseconds (5 seconds)
PRAGMA busy_timeout = 5000;How It Works & Key Takeaways
Configuring a busy timeout prevents transient write collisions from immediately crashing application queries under concurrent write loads.
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