On 02/03/2010 14:50, Shah, Malay wrote: > Pavel, > > I don't want to profile my application, as I am sure that there is no memory > leak happening either on the drools side or in my code, and I know that > memory for the app is not enough. I am running my app on 10G memory with > 75000 objects/facts (taking about 600 MB heap), and running about 75 complex > rules across these facts. One solution is to increase the heap, but is there > anything else that I can do (other than adding drools properties as mentioned > in my earlier email). Also, is it possible to know how much time each rule > took to execute on a set of facts, when we apply a bunch of rules together in > a stateless session? This would help me debug such issues easily when new > rules are added to my application. > Have you had any progress here? There is no "out of the box" way to get the information you need.
mark > Thanks > > Malay Shah > > -----Original Message----- > From: rules-users-boun...@lists.jboss.org > [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Pavel Tavoda > Sent: Tuesday, March 02, 2010 3:26 AM > To: Rules Users List > Subject: Re: [rules-users] Drools memory usage issue > > At first start with tuning JVM. Xms, Xmx parameters. How much physical memory > you have? If above 3.xx GB you need 64 bit JVM. If this is not enough just > kick Profiler. > > Pavel > > 2010/3/2 Shah, Malay<malay.s...@morganstanley.com>: > >> Hi, >> >> We have an drools 5.0.1 application that uses StatelessSession and >> high volume of objects (facts) that we need to apply static rules on, >> and having out of memory issues doing so. We added the following three >> properties as given in the drools documentation for decreasing the memory >> usage: >> >> drools.shadowproxy=false >> drools.maintainTms=false >> drools.sequential=true >> >> As per the following blog, there is an algorithm to minimize the >> engine work, and memory usage. >> http://blog.athico.com/2007/07/sequential-rete.html >> Are the properties above sufficient to trigger this algorithm, or do >> we need to do write extra code for this? >> >> Also, does the "drools.sequential" property make sure that rules are >> applied sequentially on facts? If so, is there a hook into the drools >> engine to figure out which particular rule is consuming more memory or >> having more execution time? >> >> Thanks in advance. >> >> Malay Shah >> >> ________________________________ >> >> NOTICE: If received in error, please destroy, and notify sender. >> Sender does not intend to waive confidentiality or privilege. Use of >> this email is prohibited when received in error. We may monitor and >> store emails to the extent permitted by applicable law. >> >> _______________________________________________ >> rules-users mailing list >> rules-users@lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> >> > _______________________________________________ > rules-users mailing list > rules-users@lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > > -------------------------------------------------------------------------- > NOTICE: If received in error, please destroy, and notify sender. Sender does > not intend to waive confidentiality or privilege. Use of this email is > prohibited when received in error. We may monitor and store emails to the > extent permitted by applicable law. > > _______________________________________________ > rules-users mailing list > rules-users@lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > > _______________________________________________ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
