@mo видимо, да:
WAL normally requires that the VFS support shared-memory primitives. (Exception: WAL without shared memory) The built-in unix and windows VFSes support this but third-party extension VFSes for custom operating systems might not.
All processes using a database must be on the same host computer; WAL does not work over a network filesystem.
@dside прям из нескольких процессов можно одну и ту же базу открыть?