Dan, On Thu, Oct 31, 2013 at 1:45 AM, Dan Kennedy <danielk1...@gmail.com> wrote: > On 10/31/2013 06:20 AM, Igor Korot wrote: >> >> Hi, Clemens et al, >> >> On Wed, Oct 30, 2013 at 1:11 AM, Igor Korot <ikoro...@gmail.com> wrote: >>> >>> Clemens, >>> >>> On Wed, Oct 30, 2013 at 12:47 AM, Igor Korot <ikoro...@gmail.com> wrote: >>>> >>>> On Wed, Oct 30, 2013 at 12:36 AM, Clemens Ladisch <clem...@ladisch.de> >>>> wrote: >>>>> >>>>> Igor Korot wrote: >>>>>> >>>>>> After those triggers had been created the application start-up time >>>>>> significantly increased. >>>>>> >>>>>> On start-up it opens connection to the database and queries the table >>>>>> that is not part of the trigger. >>>>>> >>>>>> Any idea what to look for? >>>>> >>>>> Are you creating one connection, or do you open it multiple times? >>>> >>>> Nope, one connection - one time. >>>> And it's not MT application. >>>> >>>>> Run your application under a profiler. >>>> >>>> Never used the profiler before. I guess it's time to learn. ;-) >>> >>> I have MSVC 2010 Pro and it does not contain the possibility to run >>> it. I.e. looking at >>> http://msdn.microsoft.com/en-us/library/ms182372.aspx#Step1, I don't >>> have "Analyze" menu. >>> >>> Thank you. >> >> I was able to run my code using command line performance tools. >> And if I interpret the results right, the start-up time slows down >> when the db uses trigger. >> >> The 2 profiler sessions are attached. >> Could someone please confirm or deny my understanding? > > > The first time you execute an SQL query on a connection (sqlite3* > handle), it has to load the database schema into memory. This means > parsing the CREATE TRIGGER (and other) statements stored in the > sqlite_master table and creating the in-memory objects that SQLite > uses to store the schema in-memory. This does take some time, and > the more schema objects you add, the longer it takes. > > But really, on a workstation, unless you have huge numbers of > triggers this shouldn't be significant. Nothing like "several > seconds" anyhow.
OK, thank you for explanation. > > This mailing list strips attachments. So you will need to upload > the profiler sessions somewhere so people can see them. Which csv file out of MSVC profiler I should upload? I can probably do it on pastebin... Thank you. > > Dan. > > > > > > _______________________________________________ > sqlite-users mailing list > sqlite-users@sqlite.org > http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
