<div><br></div> Nikhil,<div><br></div><div> Maybe you are using the term "memory leak" loosely here, but otherwise, Drools 4.0.7 and Drools 5.0.1 were both tested to exhaustion for memory leaks and I can tell you that no memory leak was found, and I personally doubt there is one there on regular use. Also, FYI, Drools 5.x eliminates the need for shadow facts, what is a considerable memory save over 4.x, but adds some other overheads for performance improvement that kind of offset those gains. On the other hand, Drools 5.1.1 takes the algorithm to a new level, saving a lot of memory on systems that use modify actions on their rules.</div>
<div><br></div><div><a href="http://blog.athico.com/2010/03/drools-halves-memory-use-with-new-true.html">http://blog.athico.com/2010/03/drools-halves-memory-use-with-new-true.html</a></div><div><br></div><div> Regarding your performance, all I can tell you is that a rules engine is a relational engine that works pretty much like a database, and rules as databases queries. The same way you can write SQL queries that run fast or slow on a database, you can write rules that run fast or slow on a rules engine. It all depends on how the rules/queries are written, how your data model/domain model looks like, etc.</div>
<div><br></div><div> So, regarding your question, we can't tell you how to improve those metrics without knowing your domain model, rules and etc. </div><div><br></div><div> []s</div><div> Edson<br><br><div class="gmail_quote">
2010/9/17 Nikhil S. Kulkarni <span dir="ltr"><<a href="mailto:Nikhil.Kulkarni@mastek.com">Nikhil.Kulkarni@mastek.com</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div lang="EN-US" link="blue" vlink="purple">
<div>
<p class="MsoNormal">Hi,</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"> I
have written 2 different Drools programs. One is with Using rule Base of Drools
4.0 and other is using Knowledge Base of Drools 5.0.</p>
<p class="MsoNormal">I was trying to check that is there any improvement in
Drools 5.0. But I haven’t got any performance improvement in Drools 5.0
code compared to Drools 4.0.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"> One
more important thing is I am calling this drools code from My application
which itself is heavy application, when I am doing Performance tuning </p>
<p class="MsoNormal">I got one point i.e. session.execute() method is taking
around 6-7 seconds to initialize rules and even the memory utilized by Rules is
huge.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">So is there any way that we can reduce the Memory leakage
and improve performance.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Waiting for Reply.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Thanks & Regards,</p>
<p class="MsoNormal">Nikhil S. Kulkarni</p>
<p class="MsoNormal">Emp No: - 9254</p>
<p class="MsoNormal"> </p>
</div>
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