No there are no mmap support in the vfs. So I need also -DSQLITE_DEFAULT_LOCKING_MODE=1 in my compile time options, right?
Recompile and retested it, but still the same behavior (also on an empty new db). I am surprised that sqlite3_exec(db, "PRAGMA journal_mode;", testCallbackPrint, 0, &zErrMsg); has absolutly no effect. Should I not get at least the default journal mode as answer? -----Original Message----- From: sqlite-users-bounces at mailinglists.sqlite.org [mailto:sqlite-users-boun...@mailinglists.sqlite.org] On Behalf Of Clemens Ladisch Sent: Donnerstag, 16. April 2015 11:23 To: sqlite-users at mailinglists.sqlite.org Subject: Re: [sqlite] Problems with pragma journal_mode Janke, Julian wrote: > PRAGMA journal_mode=WAL; > > Unfortunately, after these lines, the journal mode is not changed. > > -DSQLITE_OS_OTHER=1 Do you have mmap support? <http://www.sqlite.org/wal.html> says: | WAL normally requires that the VFS support shared-memory primitives. | The built-in unix and windows VFSes support this but third-party | extension VFSes for custom operating systems might not. But <http://www.sqlite.org/wal.html#noshm> says: | Use of WAL Without Shared-Memory | | Beginning in SQLite version 3.7.4, WAL databases can be created, read, | and written even if shared memory is unavailable as long as the | locking_mode is set to EXCLUSIVE before the first attempted access. In | other words, a process can interact with a WAL database without using | shared memory if that process is guaranteed to be the only process | accessing the database. This feature allows WAL databases to be | created, read, and written by legacy VFSes that lack the "version 2" | shared-memory methods xShmMap, xShmLock, xShmBarrier, and xShmUnmap on | the sqlite3_io_methods object. Regards, Clemens _______________________________________________ sqlite-users mailing list sqlite-users at mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users ________________________________ Firma: Capgemini Deutschland GmbH Aufsichtsratsvorsitzender: Antonio Schnieder ? Gesch?ftsf?hrer: Dr. Michael Schulte (Sprecher) ? Jost F?rster ? Dr. Peter Lempp ? Dr. Volkmar Varnhagen Amtsgericht Berlin-Charlottenburg, HRB 98814 This message contains information that may be privileged or confidential and is the property of the Capgemini Group. It is intended only for the person to whom it is addressed. If you are not the intended recipient, you are not authorized to read, print, retain, copy, disseminate, distribute, or use this message or any part thereof. If you receive this message in error, please notify the sender immediately and delete all copies of this message.
