Hi, folks,

I recently did a benchmark on Drools 5.1.2 and noticed that data insert into a stateful session is very time consuming. It took me about 30 minutes to insert 10,000 data rows on a 512M heapsize JVM. Hence I have to keep inserting data rows when I receive them and keep them in working memory, rather than loading them in a batch at a given time. This is not a friendly way for disaster recovery and I have two questions here to see if anybody has any thoughts:

1. Is there any better way to improve the performance of data insert into a stateful session;

2. I noticed that there is a method called BatchExecution() for a stateless session. Did not get a chance to test it yet but is this a better way to load data in a batch and then run rules?

My requirement is I need to load a batch of data once by end of the day, and then run the rules to filter out matched data against unmatched data. I have a 3-hour processing window to complete this loading and matching process, and the data I need to load is about 1 million to 2 millions. My JVM heapsize can be set up to 1024 M.

Best regards

Abe