[
https://issues.apache.org/jira/browse/HIVE-21832?focusedWorklogId=256007&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-256007
]
ASF GitHub Bot logged work on HIVE-21832:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 07/Jun/19 16:00
Start Date: 07/Jun/19 16:00
Worklog Time Spent: 10m
Work Description: b-slim commented on pull request #665: HIVE-21832: New
metrics to get the average queue/serving/response time
URL: https://github.com/apache/hive/pull/665#discussion_r291656149
##########
File path:
llap-server/src/java/org/apache/hadoop/hive/llap/metrics/LlapDaemonExecutorMetrics.java
##########
@@ -195,14 +202,22 @@ private LlapDaemonExecutorMetrics(String displayName,
JvmMetrics jm, String sess
this.executorThreadUserTime[i] = registry.newGauge(miu, 0L);
this.executorNames.put(ContainerRunnerImpl.THREAD_NAME_FORMAT_PREFIX +
i, i);
}
+ if (simpleAverageWindowDataSize > 0) {
+ this.queueTime = new
SynchronizedDescriptiveStatistics(simpleAverageWindowDataSize);
Review comment:
took quick look at the implementation of `SynchronizedDescriptiveStatistics`
and i see synchronized everywhere,
maybe be this is not an issue yet but i can see how it can be become an
issue in the future as a source of contentions, wondering if we can use a
longAdder to compute ourself the the average, that should be lock free and will
probably spread the contention.
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Issue Time Tracking
-------------------
Worklog Id: (was: 256007)
Time Spent: 20m (was: 10m)
> New metrics to get the average queue/serving/response time
> ----------------------------------------------------------
>
> Key: HIVE-21832
> URL: https://issues.apache.org/jira/browse/HIVE-21832
> Project: Hive
> Issue Type: Sub-task
> Components: llap
> Reporter: Peter Vary
> Assignee: Peter Vary
> Priority: Major
> Labels: pull-request-available
> Attachments: HIVE-21832.2.patch, HIVE-21832.patch
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> Simple
> [DescriptiveStatistics|https://commons.apache.org/proper/commons-math/javadocs/api-3.6/src-html/org/apache/commons/math3/stat/descriptive/DescriptiveStatistics.html#line.60]
> with window size would do here. Time is not important in this case.
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