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https://issues.apache.org/jira/browse/DRILL-5287?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15881758#comment-15881758
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ASF GitHub Bot commented on DRILL-5287:
---------------------------------------
Github user paul-rogers commented on a diff in the pull request:
https://github.com/apache/drill/pull/758#discussion_r102862961
--- Diff:
exec/java-exec/src/main/java/org/apache/drill/exec/ExecConstants.java ---
@@ -413,4 +413,8 @@
String DYNAMIC_UDF_SUPPORT_ENABLED = "exec.udf.enable_dynamic_support";
BooleanValidator DYNAMIC_UDF_SUPPORT_ENABLED_VALIDATOR = new
BooleanValidator(DYNAMIC_UDF_SUPPORT_ENABLED, true, true);
+
+ String ZK_QUERY_STATE_UPDATE_KEY = "drill.exec.zk.query.state.update";
--- End diff --
Maybe ENABLE_QUERY_STATE_UPDATE_KEY? For the key name, maybe don't include
ZK. ZK is our solution today, but this option would be equally valid if we used
some other mechanism.
> Provide option to skip updates of ephemeral state changes in Zookeeper
> ----------------------------------------------------------------------
>
> Key: DRILL-5287
> URL: https://issues.apache.org/jira/browse/DRILL-5287
> Project: Apache Drill
> Issue Type: Bug
> Affects Versions: 1.9.0
> Reporter: Padma Penumarthy
> Assignee: Padma Penumarthy
> Fix For: 1.10
>
>
> We put transient profiles in zookeeper and update state as query progresses
> and changes states. It is observed that this adds latency of ~45msec for each
> update in the query execution path. This gets even worse when high number of
> concurrent queries are in progress. For concurrency=100, the average query
> response time even for short queries is 8 sec vs 0.2 sec with these updates
> disabled. For short lived queries in a high-throughput scenario, it is of no
> value to update state changes in zookeeper. We need an option to disable
> these updates for short running operational queries.
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