You would almost certainly only use these on pages, not in sessions. Otherwise your user will open 2 pages with the same DG instance in it and happily page to and fro in them.
And the ERXAdaptorChannelDelegate expression log stuff for checking out which statements actually run and the ERXDatabaseContextDelegate.batchFaulting stuff for fixing it. Cheers, Anjo Am 30.06.2010 um 19:16 schrieb Baiss Eric Magnusson: > > My scenario is that I have a large group of Transaction records for a > particular owner, (300-50000), each with ~16 fields, nine of those foreign > key references, that will provide the bulk of the content of each WOComponent > page in various aggregations and averages and even individualistic viewing. > > I'm following a path where I removed all the WODisplayGroups from the woo > files and then put the EODatabaseDataSource and/or > ERXDisplayGroup/ERXBatchingDisplayGroup into the Session. > > It's the and/or question above that I'm curious about. Do I use the > EODatabaseDataSource reference or the ERXDisplayGroup/ERXBatchingDisplayGroup > reference from the Session? > > The result is after the first page all of the pages are loading measurably > faster. :-) > > I still have not succeeded in implementing ERXBatchingDisplayGroup, I'm not > sure it will help since I often use all <n> Transactions in a calculation. > > A JProfile result is: (any comments?) > > Starting with Login page launch: > Profiler: 1071.20ms; SQL: 0% (0); D2W: 0% (0); T/I/A: 0% / 0% / 25% > 14229 [WorkerThread15] WARN er.extensions.eof.ERXModelGroup - Clearing > previous class descriptions > Profiler: 3931.02ms; SQL: 35% (59); D2W: 0% (0); T/I/A: 1% / 74% / 25% > Profiler: 166.19ms; SQL: 10% (3); D2W: 0% (0); T/I/A: 0% / 16% / 83% > Profiler: 3.25ms; SQL: 0% (0); D2W: 0% (0); T/I/A: 0% / 10% / 33% > Profiler: 783.31ms; SQL: 14% (50); D2W: 0% (0); T/I/A: 72% / 0% / 28% > Profiler: 108.10ms; SQL: 4% (2); D2W: 0% (0); T/I/A: 0% / 10% / 89% > Profiler: 9.77ms; SQL: 0% (0); D2W: 0% (0); T/I/A: 0% / 2% / 16% > Profiler: 3690.80ms; SQL: 49% (790); D2W: 0% (0); T/I/A: 10% / 0% / 90% > Profiler: 1311.58ms; SQL: 0% (2); D2W: 0% (0); T/I/A: 0% / 14% / 86% > Profiler: 11.17ms; SQL: 0% (0); D2W: 0% (0); T/I/A: 0% / 2% / 58% > > This effort is the result of JProfiling results and the ideas of Chuck below. > > dataSource = new EODatabaseDataSource(editingContext(), entityName()); > > dataSource.fetchSpecification().setPrefetchingRelationshipKeyPaths(prefetchingRelationshipKeyPaths()); > dataSource.fetchSpecification().setRefreshesRefetchedObjects( > refreshesRefetchedObjects() ); > dataSource.fetchSpecification().setIsDeep( true ); > dataSource().fetchSpecification().setQualifier(qualifier()); > displayGroup.setDataSource(dataSource); > > ***** > “I consider myself a very moral person,” he said. “Suddenly, I felt like a > character in a Beckett play, where you have moral obligations towards > something you have no possibility of understanding. It was like ‘Waiting for > Godot’ — I was in limbo.” > > Quote from Reykjavik's new mayor, when answering a question about the banking > crisis. > > Baiss Eric Magnusson > CascadeWebDesign.com > > > > > > > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Webobjects-dev mailing list ([email protected]) > Help/Unsubscribe/Update your Subscription: > http://lists.apple.com/mailman/options/webobjects-dev/anjo%40krank.net > > This email sent to [email protected] _______________________________________________ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list ([email protected]) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to [email protected]
