[rules-users] Large number of rules in Drools

[Wolfgang Laun]

20K rules is not excessive, and this number alone should not cause
out-of-memory exceptions. Mainly, this is due to rules not being well
designed, and in combination with heavy fact loads.

Frequently, a large number of rules results from putting all the decision
data into rule conditions, even when there are many rules with identical
structure in condition and consequence. Offloading the varying constants
into static facts may reduce the number of rules by magnitudes.

Not the number of rules but the maintenance issue is addressed by using
decision tables or some other technique of generating rules from a handier
source.

-W

2012/1/3 Shweta1986 <shweta.a.thakkar at gmail.com>

> Hi,
>          I am using drools for 2 of our projects. For one of them I have
> more than 20K simple rules. But with number of rules I have started seeing
> out of memory exceptions and also configuring 20K rules through guvnor is
> difficult. Is there an alternative for this? Is there something like  file
> upload for drl on guvnor ? Is there a limit on number of rules ?
>
> Thanks,
> Shweta
>
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