There is still some room for improvement on network level. The packets are not batches as much as it could be for server to still understand it. Dmitri Y. reported it to me some months ago.
It just needs a lot of time with Wireshark and tweaking the socket until it's same as with fbclient.dll. Maybe somebody could help me with that as well. -- Mgr. Jiří Činčura Independent IT Specialist ________________________________________ From: Jiří Činčura <disk...@cincura.net> Sent: Sunday, August 10, 2014 3:23:14 PM To: For users and developers of the Firebird .NET providers Subject: Re: [Firebird-net-provider] Questions with performance metrics doing large inserts into DB It's roundtrip per some records (depends on size of data), not each record. Putting the records into DataTable will not be faster in any way, as it uses the DataReader internally. -- Mgr. Jiří Činčura Independent IT Specialist ________________________________________ From: Paulo Gomes <paulo_...@sapo.pt> Sent: Saturday, August 09, 2014 4:30:41 PM To: For users and developers of the Firebird .NET providers Subject: Re: [Firebird-net-provider] Questions with performance metrics doing large inserts into DB Hi Edward, I think you answered yourself, the enumerator uses a trip to the database for each record. You should try to break the data in smaller packages (100000 for example) and use a DataAdapter to get the data into DataTable. If possible also use several transactions (1 per Package) to keep the memory usage in control. If performance is a must you can always use deal with different Threads(1 for read and 1 for write) , though you will probably add a wanted dead or alive sign on my name for mentioning it. Note: the nº of records should depend on their average size Regards Paulo Gomes Em 09-08-2014 06:56, Edward Mendez escreveu: > >> You should start transaction explicitly. Else it's one transaction per >> command >> and in a batch processing that goes out of hand really quickly. > I agree with you 100%. The part that I hadn't given much thought was the > Isolation levels to pass as the parameter into the transaction object. > > >> I would rather write correct algorithm than spent hours on micro-optimizing >> loops. BTW did you know asm loops are faster than Delphi and .NET loops? > Ah ASM, that is definitely a blast from the past. > > In trying to eliminate certain bottlenecks, I moved a small sample of the > source data to a local FB db and ran the .NET test and there it was > practically instantaneous reading the data. I think the Network Latency on my > corporate network is another factor. > Over the weekend, I will move a more sizable sampling to my local DB and > attempt the test with the Reads and Write. I downloaded Red-gate (trial) and > will profile the App. I will keep everyone posted on the any findings. > > Thanks, > > Edward Mendez > > > ------------------------------------------------------------------------------ > _______________________________________________ > Firebird-net-provider mailing list > Firebird-net-provider@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/firebird-net-provider ------------------------------------------------------------------------------ _______________________________________________ Firebird-net-provider mailing list Firebird-net-provider@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/firebird-net-provider ------------------------------------------------------------------------------ _______________________________________________ Firebird-net-provider mailing list Firebird-net-provider@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/firebird-net-provider ------------------------------------------------------------------------------ _______________________________________________ Firebird-net-provider mailing list Firebird-net-provider@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/firebird-net-provider
