Thank you very much. You're super quick guys :)
Cheers, Tomasz M ________________________________ From: sqlite-users <sqlite-users-boun...@mailinglists.sqlite.org> on behalf of Dan Kennedy <danielk1...@gmail.com> Sent: Thursday, March 16, 2017 8:34:30 PM To: sqlite-users@mailinglists.sqlite.org Subject: Re: [sqlite] Is it possible to change "synchronous" flag of ZIPVFS pager? On 03/16/2017 05:00 PM, Tomasz Maj wrote: > I have an application which work with many zipped databases in WAL journal > mode and the databases are stored on a media of low write bandwidth. There is > a problem that that fsync operations invoked from one thread are blocking > other fsync operations invoked from another thread. I think that changing the > synchronous mode to NORMAL on some connections may make the blocking issue > less painful. May the possibility of changing ZIPVFS synchronous mode be > implemented in sqlite? Latest commit in the zipvfs project fixes things so that "PRAGMA synchronous" works with zipvfs databases. Dan. > > > Cheers, > > Tomasz M > > ________________________________ > From: sqlite-users <sqlite-users-boun...@mailinglists.sqlite.org> on behalf > of Tomek Maj <majek...@gmail.com> > Sent: Thursday, March 16, 2017 10:50:37 AM > To: SQLite mailing list > Subject: Re: [sqlite] Is it possible to change "synchronous" flag of ZIPVFS > pager? > > 2017-03-16 9:51 GMT+01:00 Dan Kennedy <danielk1...@gmail.com>: > >> On 03/16/2017 01:40 PM, Tomasz Maj wrote: >> >>> Hi, >>> >>> >>> According to my observations, "PRAGMA synchronous=...;" query affects >>> only the standard sqlite pager. But for zipped databases sqlite uses >>> additional ZIPVFS pager layer which actually decide whether and when to >>> sync content of files associated with a database. It looks like "PRAGMA >>> synchronous=...;" query doesn't have any effect on zipped databases. Are my >>> observations right? If so, is it possible to manipulate "synchronous" flag >>> of ZIPVFS pager? >>> >> It looks like there is not. Is it something you need to do? >> >> Dan. >> >> >> _______________________________________________ >> sqlite-users mailing list >> sqlite-users@mailinglists.sqlite.org >> http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users >> > _______________________________________________ > sqlite-users mailing list > sqlite-users@mailinglists.sqlite.org > http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users > _______________________________________________ > sqlite-users mailing list > sqlite-users@mailinglists.sqlite.org > http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users _______________________________________________ sqlite-users mailing list sqlite-users@mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users _______________________________________________ sqlite-users mailing list sqlite-users@mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users
