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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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