Does SQLite support concurrent reads?

Question

Overview. Usually, SQLite allows at most one writer to proceed concurrently. The BEGIN CONCURRENT enhancement allows multiple writers to process write transactions simultanously if the database is in "wal" or "wal2" mode, although the system still serializes COMMIT commands.

Can SQLite handle concurrency?

SQLite does support multiple concurrent connections, and therefore it can be used with a multi-threaded or multi-process application. The catch is that when SQLite opens a write transaction, it will lock all the tables.

How many concurrent connections can SQLite handle?

The default limit is 1,024.

Does SQLite support multiple connections?

Yes SQLite can support multiple users at once. It does however lock the whole database when writing, so if you have lots of concurrent writes it is not the database you want (usually the time the database is locked is a few milliseconds - so for most uses this does not matter).

Can you read and write SQLite at the same time?

First, by default, multiple processes can have the same SQLite database open at the same time, and several read accesses can be satisfied in parallel. In case of writing, a single write to the database locks the database for a short time, nothing, even reading, can access the database file at all.

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