A recent post on the users list has led me to investigate DTs with O(10000) rows. While the sample XLS with 26,400 rows and 6 condition and 1 action columns was still manageable, a (my) system may exhibit severe memory problems when the number of rows is increased. Test indicate that ~25,000 rows is just about manageable if you don't need lightning startup for your application - serialization doesn't help here. It would appear that Drools users are (not intentionally) led to believe that Drools' performance is immune against the usual detriments that arise from "large numbers". I think that Section 2.4., Decision Tables in Spreadsheets, should contain a warning. -W _______________________________________________ rules-dev mailing list rules-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-dev

On 19/06/2012, Michael Anstis <michael.anstis(a)gmail.com&gt; wrote: > Agreed. > > I'll add something. > Nice, thank you. > I've raised a JIRA to capture a need to shift to a different Excel library > too: https://issues.jboss.org/browse/JBRULES-3549 > The times for (de)serialization indicate that it isn'n just Excel that doesn't. But big is big... -W > With kind regards, > > Mike > > On 19 June 2012 10:18, Wolfgang Laun <wolfgang.laun(a)gmail.com&gt; wrote: > >> A recent post on the users list has led me to investigate DTs with >> O(10000) rows. While the sample XLS with 26,400 rows and 6 condition >> and 1 action columns was still manageable, a (my) system may exhibit >> severe memory problems when the number of rows is increased. >> >> Test indicate that ~25,000 rows is just about manageable if you don't >> need lightning startup for your application - serialization doesn't >> help here. >> >> It would appear that Drools users are (not intentionally) led to >> believe that Drools' performance is immune against the usual >> detriments that arise from "large numbers". >> >> I think that Section 2.4., Decision Tables in Spreadsheets, should >> contain a warning. >> >> -W >> _______________________________________________ >> rules-dev mailing list >> rules-dev(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-dev >> > _______________________________________________ rules-dev mailing list rules-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-dev