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Posted to gitbox@activemq.apache.org by GitBox <gi...@apache.org> on 2019/06/26 04:10:15 UTC

[GitHub] [activemq-artemis] wy96f commented on issue #2730: ARTEMIS-2399 Fix performance degradation when there are a lot of subscribers

wy96f commented on issue #2730: ARTEMIS-2399 Fix performance degradation when there are a lot of subscribers
URL: https://github.com/apache/activemq-artemis/pull/2730#issuecomment-505710006
 
 
   > @wy96f 5000 msg/sec sounds to me too similar to the default value for page-max-concurrent-io ie "The max number of concurrent reads allowed on paging. Default=5"
   > Could you check the results again by increasing the default to the total number of consumers?
   > To avoid being backpressured by the `Semaphore` when the pages are being evicted?
   
   We adjusted page-max-concurrent-io to 560, the result was similar.
   producer tps and latency:
   ![orig_560_producer](https://user-images.githubusercontent.com/7719761/60150435-546cf600-980b-11e9-94ca-93eb800a4882.png)
   
   consumer tps and latency:
   ![orig_560_consumer](https://user-images.githubusercontent.com/7719761/60150437-559e2300-980b-11e9-8e80-7affee55c852.png)
   

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