[GitHub] [incubator-druid] leventov commented on a change in pull request #7088: Improve parallelism of zookeeper based segment change processing

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leventov commented on a change in pull request #7088: Improve parallelism of zookeeper based segment change processing
URL: https://github.com/apache/incubator-druid/pull/7088#discussion_r276323483
 
 

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 File path: docs/content/configuration/index.md
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 @@ -1255,7 +1255,8 @@ These Historical configurations can be defined in the `historical/runtime.proper
 |`druid.segmentCache.infoDir`|Historical processes keep track of the segments they are serving so that when the process is restarted they can reload the same segments without waiting for the Coordinator to reassign. This path defines where this metadata is kept. Directory will be created if needed.|${first_location}/info_dir|
 |`druid.segmentCache.announceIntervalMillis`|How frequently to announce segments while segments are loading from cache. Set this value to zero to wait for all segments to be loaded before announcing.|5000 (5 seconds)|
 |`druid.segmentCache.numLoadingThreads`|How many segments to drop or load concurrently from from deep storage.|10|
-|`druid.segmentCache.numBootstrapThreads`|How many segments to load concurrently from local storage at startup.|Same as numLoadingThreads|
+|`druid.coordinator.loadqueuepeon.curator.numCallbackThreads`|Number of threads for executing callback actions associated with loading or dropping of segments.|2|
 
 Review comment:
   These docs should be extended. They should explain why the default is what it is, and when the cluster operator may want to increase or decrease the value. See https://github.com/apache/incubator-druid/pull/7088#discussion_r266154524

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