In that case - oops. I definitely was experimenting with the db-centric version. It looks to me like the lowest-level mechanism is similar between the two, but sqlite3_db_release_memory() isn't optionally compiled.
-scott On Thu, Jan 7, 2016 at 12:32 AM, Bart Smissaert <bart.smissaert at gmail.com> wrote: > OK, will try that. > sqlite3_release_memory doesn't have the DB connection as an argument, but > found > sqlite3_db_release_memory and that has that as an argument and that may > work better. > > RBS > > On Thu, Jan 7, 2016 at 6:05 AM, Scott Hess <shess at google.com> wrote: > > > On Wed, Jan 6, 2016 at 3:03 PM, Bart Smissaert <bart.smissaert at gmail.com > > > > wrote: > > > > > Have compiled sqlite3.dll (latest) compiled with > > ENABLE_MEMORY_MANAGEMENT, > > > but sofar > > > not been able yet to make sqlite3_release_memory produce anything else > > than > > > 0. > > > What would be the simplest way to make this happen? > > > I don't want to do this with C coding, so it should be some SQL > scenario > > or > > > to do with simple > > > SQLite functions such as sqlite3_step, _prepare, -finalize etc. > > > > > > Last time I was paying attention to this, I believe that I found that the > > biggest effect was to free unpinned pages from the page cache. So it > might > > not free pages if you're in a transaction, for instance. I would guess > > that if you had memory-mapped mode on and are doing only reads, there > would > > be no pages to free (mmap pages aren't in the page cache). So you should > > see results if you start a transaction, do a few update statements, > commit > > the transaction, the call sqlite3_release_memory(db). > > > > -scott > > _______________________________________________ > > sqlite-users mailing list > > sqlite-users at mailinglists.sqlite.org > > http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users > > > _______________________________________________ > sqlite-users mailing list > sqlite-users at mailinglists.sqlite.org > http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users >
