On 5/2/16, Mikael <mikael.trash at gmail.com> wrote: > > If I just force it on (by hacking the build script), as long as mmap_size > always is 2^63, will Sqlite access the file via memory accesses only, and > never using fread/fwrite which would lead to undefined behavior because of > the absence of a UBC? >
SQLite only reads using mmap. Write always happen using the write() (or pwrite()) system call. So it will never work on OpenBSD. The database file is mmap-ed read-only. This is so that stray pointers in the application cannot trivially corrupt the database file. -- D. Richard Hipp drh at sqlite.org
