On 1/19/15, Roger Binns <rog...@rogerbinns.com> wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > On 01/18/2015 06:49 PM, Wei, Catherine wrote: >> takes too much time when it executes fsync or fdatasync function. > > Note that although the documentation says only the file handle is > synced, in practise many filesystems actually sync the whole > filesystem writing out all pending data for all files. > > The reason is the underlying filesystem is written to carefully write > content (especially meta data) in a particular order, to ensure > robustness against power losses, make syncs easier to manage, and make > fsck easier. Trying to sync just the one file handle is too > complicated, so they sync everything. > > You need to watch out for other write activity on the system, not just > SQLite. >
All true. But also note that you can dramatically reduce the number of fsync() calls by using WAL mode in SQLite. -- D. Richard Hipp d...@sqlite.org _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
