SQLite WAL mode concurrency: what you actually get. People ask “How many concurrent requests can SQLite handle?” as if there’s a magic number you can paste into a capacity plan.SQLite WAL explicitly does not work over network filesystems. (D. Richard Hipp).

There are actually multiple modes of SQLite operation but we're going to focus on Write-Ahead Logging(WAL). It's not the default mode so one needs to enable it by running PRAGMA journal_mode=WAL SQL statement.

How to Put WAL to the Test Yourself. Ready to stop theorizing and start seeing those numbers fly? Here’s a simple, three-step process to enable WAL mode, set your synchronization for maximum speed, and run your own a quick benchmark to prove its power.

PRAGMA journal_mode = WAL; 2. Synchronous Mode By default, SQLite syncs to disk on every transaction to guarantee zero data loss on power failure. In WAL mode, you can safely set this to NORMAL.