rdhabalia commented on a change in pull request #7910:
URL: https://github.com/apache/pulsar/pull/7910#discussion_r478848714



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File path: conf/broker.conf
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@@ -624,6 +624,9 @@ bookkeeperClientTimeoutInSeconds=30
 # Using a value of 0, is disabling the speculative reads
 bookkeeperClientSpeculativeReadTimeoutInMillis=0
 
+# Number of channels per bookie
+bookkeeperNumberOfChannelsPerBookie=16

Review comment:
       right now, hardcoded value is `16` and it was configured > 1 due to per 
bookie cnx bottleneck. So, changing it to 1 will create an issue for existing 
system if they will try to use upgrade release without knowledge of this 
configuration. However, recently while doing testing on high throughput 
bookies, we figured out that 16 bookie channel was the bottleneck and we need 
to make it configurable to tune it based on number topics and per bookie 
traffic.




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