Re: [rules-dev] Decision Tables with O(10000) rows
On 19/06/2012, Michael Anstis <michael.anstis(a)gmail.com> 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> 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
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