Github user revans2 commented on a diff in the pull request:
https://github.com/apache/storm/pull/700#discussion_r38021285
--- Diff: conf/defaults.yaml ---
@@ -140,6 +140,14 @@ task.heartbeat.frequency.secs: 3
task.refresh.poll.secs: 10
task.credentials.poll.secs: 30
+# now should be null by default
+topology.backpressure.enable: true
+backpressure.worker.high.watermark: 0.9
+backpressure.worker.low.watermark: 0.4
+backpressure.executor.high.watermark: 0.9
+backpressure.executor.low.watermark: 0.4
+backpressure.spout.suspend.time.ms: 100
--- End diff --
This seems way too high. It is not that expensive to poll at a 1ms
interval in the spout waiting for back-pressure to be turned off.
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