[rules-users] Drools Performance

[Vikrant Yagnick]

I can only add one thing to the answer.  I don't have performance metrics available, though I did some Q&D tests with 15000 rules and the speeds I got for the kind of processing I did (1-3 seconds) were really good.

The downside was the Permgen memory space usage which was pretty high and we are still grappling with that problem.  Mark had suggested that I use MVEL instead of the Java Dialect(which we could not do due to a time constraint) to reduce this usage besides we are now migrating to Drools 5 where we hope this has improved.

The performance will very well depend on how you design the rules(single rulebase, multiple rulebase) etc

Cheers,
Vikrant

From: rules-users-bounces at lists.jboss.org [mailto:rules-users-bounces at lists.jboss.org] On Behalf Of Ashish Soni
Sent: Thursday, February 12, 2009 9:37 PM
To: Rules Users List
Subject: Re: [rules-users] Drools Performance

Any more response will be appreciated as i am in the final phase of drools evaluation and need this urgently.

regards,
Ashish
On Wed, Feb 11, 2009 at 3:21 PM, Steve Núñez <steve.nunez at illation.com.au<mailto:steve.nunez at illation.com.au>> wrote:
Ashish,

There are a lot of variables involved in performance benchmarking. Your scenario is common in many industries, such as insurance, that utilise large decision tables.

We have previously published benchmarks comparing various rules engines at http://illation.com.au/benchmarks, however they don't specifically address the use case of large rulesets, but instead stress various aspects of the rules engines.

We are working to put together a new set of benchmarks that will better test typical use cases, and we'd welcome your comments and participation. We are very early in this process, and should have a publically available 'blog to discuss the topic.

Regards,
    - Steve Nunez



On 11/02/09 11:37 AM, "Ashish Soni" <learnspring at gmail.com<http://learnspring@gmail.com>> wrote:
Hi All ,

I am not sure if this question is asked previously but it would be great if any one can put some lights on this ..

If i have 10,000 rules with same priority or equal priority then how drools engine evaluate them or what is the path it chooses.

Also if there any performance metrics available ,please point to the links.


Thanks and Regards,
Ashish soni

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