[ https://issues.jboss.org/browse/DROOLS-2409?page=com.atlassian.jira.plugi... ] Mike Baranski edited comment on DROOLS-2409 at 3/22/18 9:21 AM: ---------------------------------------------------------------- Agreed on the fact that this is not *really* a great real-world example. Perhaps better is a "batch" like example where we add maybe 200 records at a time and sleep in between: bq. for (i = 0; i < 10000000; i++) { bq. averageMeasurementService.addMeasurement(new Measurement(random.nextInt(100))); bq. if (i % 100000 == 0) { bq. System.out.println(i + " inserted into list of " + averageMeasurementService.getFactCount()); bq. Thread.sleep(500l); bq. } bq. if (i % 200 == 0) { bq. Thread.sleep(100l); bq. } bq. } bq. bq. This sleeps 100 ms each 200 events, which drools seems to be able to handle OK for the first few million at least. This starts to really degrade the performance: ``` for (i = 0; i < 10000000; i++) { averageMeasurementService.addMeasurement(new Measurement(random.nextInt(100))); if (i % 100000 == 0) { System.out.println(i + " inserted into list of " + averageMeasurementService.getFactCount()); Thread.sleep(500l); } if (i % 200 == 0) { Thread.sleep(10l); } } ``` In fact, with the above, it looks like maybe the event counter is overflowing: {quote} 6200000 inserted into list of -1170 zzZZzz: 49.609819277108436 zzZZzz: 49.63111764705882 zzZZzz: 49.31702380952381 zzZZzz: 49.355625 6300000 inserted into list of 20459 zzZZzz: 49.52712348322627 zzZZzz: 49.58170454545454 6400000 inserted into list of 70065 {quote} was (Author: mbaranski): Agreed on the fact that this is not *really* a great real-world example. Perhaps better is a "batch" like example where we add maybe 200 records at a time and sleep in between: {{for (i = 0; i < 10000000; i++) { averageMeasurementService.addMeasurement(new Measurement(random.nextInt(100))); if (i % 100000 == 0) { System.out.println(i + " inserted into list of " + averageMeasurementService.getFactCount()); Thread.sleep(500l); } if (i % 200 == 0) { Thread.sleep(100l); } } }} This sleeps 100 ms each 200 events, which drools seems to be able to handle OK for the first few million at least. This starts to really degrade the performance: ``` for (i = 0; i < 10000000; i++) { averageMeasurementService.addMeasurement(new Measurement(random.nextInt(100))); if (i % 100000 == 0) { System.out.println(i + " inserted into list of " + averageMeasurementService.getFactCount()); Thread.sleep(500l); } if (i % 200 == 0) { Thread.sleep(10l); } } ``` In fact, with the above, it looks like maybe the event counter is overflowing: {quote} 6200000 inserted into list of -1170 zzZZzz: 49.609819277108436 zzZZzz: 49.63111764705882 zzZZzz: 49.31702380952381 zzZZzz: 49.355625 6300000 inserted into list of 20459 zzZZzz: 49.52712348322627 zzZZzz: 49.58170454545454 6400000 inserted into list of 70065 {quote} -- This message was sent by Atlassian JIRA (v7.5.0#75005)