What's the isolation level? They only mention write-write conflicts.
The reason SQLite's BEGIN CONCURRENT does not greatly increase concurrency (unless you're very careful with your schema and queries) is as much due to page level conflict detection as it is because it enforces serializable isolation.
MVCC is a non-locking algorithm for concurrent writers that the big databases like postgres use (with caveats like aborting some transactions if conflicts would exist). It's not a matter of pushing locks around but allowing multiple threads to operate on the data concurrently.
ZeroCool2u|1 month ago
zdragnar|1 month ago
ncruces|1 month ago
The reason SQLite's BEGIN CONCURRENT does not greatly increase concurrency (unless you're very careful with your schema and queries) is as much due to page level conflict detection as it is because it enforces serializable isolation.
tonymet|1 month ago
gpm|1 month ago