[rules-dev] Decision Tables with O(10000) rows

[Wolfgang Laun]

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