21.06.2014 01:52, Nikolay Samofatov wrote: > > I attach patch for this functionality to give you an idea of > implementation. It depends on a couple other changes so it doesn't apply > to FB2.5 cleanly.
The first thing I'm interested in is the performance impact in OLTP tests similar to TPCC (with lots of short concurrent requests). Do you have any numbers? If the difference is noticable, then I believe the new mode should not become a default one, it should be turned on expicitly. Also, I believe it should be a TPB setting (read-committed specific, similar to rec_version / no_rec_version) rather than a config option. Dmitry ------------------------------------------------------------------------------ HPCC Systems Open Source Big Data Platform from LexisNexis Risk Solutions Find What Matters Most in Your Big Data with HPCC Systems Open Source. Fast. Scalable. Simple. Ideal for Dirty Data. Leverages Graph Analysis for Fast Processing & Easy Data Exploration http://p.sf.net/sfu/hpccsystems Firebird-Devel mailing list, web interface at https://lists.sourceforge.net/lists/listinfo/firebird-devel
