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https://issues.apache.org/jira/browse/HIVE-25842?focusedWorklogId=710319&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-710319
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ASF GitHub Bot logged work on HIVE-25842:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 18/Jan/22 08:24
Start Date: 18/Jan/22 08:24
Worklog Time Spent: 10m
Work Description: deniskuzZ commented on a change in pull request #2916:
URL: https://github.com/apache/hive/pull/2916#discussion_r786508087
##########
File path: ql/src/java/org/apache/hadoop/hive/ql/txn/compactor/Worker.java
##########
@@ -671,6 +679,13 @@ private String getWorkerId() {
return name.toString();
}
+ private void updateDeltaFilesMetrics(AcidDirectory directory, String dbName,
String tableName, String partName,
Review comment:
move to the common place if possible. updateDeltaFilesMetrics could be
triggered by multiple threads leading to resource starvation, think about
introducing connection pool
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Issue Time Tracking
-------------------
Worklog Id: (was: 710319)
Time Spent: 2h (was: 1h 50m)
> Reimplement delta file metric collection
> ----------------------------------------
>
> Key: HIVE-25842
> URL: https://issues.apache.org/jira/browse/HIVE-25842
> Project: Hive
> Issue Type: Improvement
> Reporter: László Pintér
> Assignee: László Pintér
> Priority: Major
> Labels: pull-request-available
> Time Spent: 2h
> Remaining Estimate: 0h
>
> FUNCTIONALITY: Metrics are collected only when a Tez query runs a table
> (select * and select count( * ) don't update the metrics)
> Metrics aren't updated after compaction or cleaning after compaction, so
> users will probably see "issues" with compaction (like many active or
> obsolete or small deltas) that don't exist.
> RISK: Metrics are collected during queries – we tried to put a try-catch
> around each method in DeltaFilesMetricsReporter but of course this isn't
> foolproof. This is a HUGE performance and functionality liability. Tests
> caught some issues, but our tests aren't perfect.
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