On Wed, 27 Mar 2013 17:55:00 -0400, Jeff Archer <jsarc...@nanotronicsimaging.com> wrote:
>On Wed, Mar 27, 2013 at 5:46 PM, David King <dk...@ketralnis.com> wrote: >> >> > I am populating a database with 5764 records using the exact same data set >> > each time into a newly created file. >> > When I use no explicit transactions (default atomic commit) it takes 17.7 >> > seconds. >> > When I set journal_mode = off, same operation takes 5.5 seconds. >> > If I do all 5764 inserts within a single transaction only 2.5 seconds. >> >> >> That sounds about right, yeah. With journalling, >> most disk writes have to be done twice (once to the >> journal and once to the data file). > > Which is why I expected journal_mode = off to make it faster. But it > is 3 seconds faster when I leave journaling enabled and do all writes > within a single transaction. I miss one test case: both journal_mode = off, and all 5764 inserts within a single transaction. Give that one a thought (and a try) and you'll understand the difference. -- Groet, Cordialement, Pozdrawiam, Regards, Kees Nuyt _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
