Local databases and SQLite WAL

Komga has been using SQLite to store its data for around 5 years (v0.48.0 - July 2020), and while it works very well most of the time, some users have experienced bottlenecks on some systems.

In order to boost performances, Komga will enable the SQLite WAL mode (Write-Ahead Logging) by default in the near future.

Since WAL does not work over a network filesystem, release 1.23.0 has introduced a startup check to ensure the databases are located on a local filesystem. Even without WAL, this is a good practice for SQLite performance.

If Komga does not start anymore after the upgrade to 1.23.0, check the logs or the documentation.