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https://issues.apache.org/jira/browse/HIVE-24974?focusedWorklogId=586378&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-586378
 ]

ASF GitHub Bot logged work on HIVE-24974:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 21/Apr/21 07:34
            Start Date: 21/Apr/21 07:34
    Worklog Time Spent: 10m 
      Work Description: deniskuzZ commented on a change in pull request #2148:
URL: https://github.com/apache/hive/pull/2148#discussion_r617272518



##########
File path: common/src/java/org/apache/hadoop/hive/conf/HiveConf.java
##########
@@ -3002,6 +3002,26 @@ private static void 
populateLlapDaemonVarsSet(Set<String> llapDaemonVarsSetLocal
     HIVE_TXN_READONLY_ENABLED("hive.txn.readonly.enabled", false,
       "Enables read-only transaction classification and related 
optimizations"),
 
+    // Configs having to do with DeltaFilesMetricReporter, which collects 
lists of most recently active tables
+    // with the most number of active/obsolete deltas.
+    
HIVE_TXN_ACID_METRICS_MAX_CACHE_SIZE("hive.txn.acid.metrics.max.cache.size", 
100,
+        "Size of the ACID metrics cache. Only topN metrics would remain in the 
cache if exceeded."),
+    
HIVE_TXN_ACID_METRICS_CACHE_DURATION("hive.txn.acid.metrics.cache.duration", 
"7200s",
+        new TimeValidator(TimeUnit.SECONDS),
+        "Maximum lifetime in seconds for an entry in the ACID metrics cache."),
+    
HIVE_TXN_ACID_METRICS_REPORTING_INTERVAL("hive.txn.acid.metrics.reporting.interval",
 "30s",
+        new TimeValidator(TimeUnit.SECONDS),
+        "Reporting period for ACID metrics in seconds."),
+    
HIVE_TXN_ACID_METRICS_DELTA_NUM_THRESHOLD("hive.txn.acid.metrics.delta.num.threshold",
 100,
+        "The minimum number of active delta files a table/partition must be 
included in the ACID metrics report."),
+    
HIVE_TXN_ACID_METRICS_OBSOLETE_DELTA_NUM_THRESHOLD("hive.txn.acid.metrics.obsolete.delta.num.threshold",
 100,
+        "The minimum number of obsolete delta files a table/partition must be 
included in the ACID metrics report."),
+    
HIVE_TXN_ACID_METRICS_DELTA_CHECK_THRESHOLD("hive.txn.acid.metrics.delta.check.threshold",
 "300s",
+        new TimeValidator(TimeUnit.SECONDS),
+        "Deltas not older than this value will not be included in the ACID 
metrics report."),

Review comment:
       no, it's the other way around. We don't want to include fresh deltas.




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Issue Time Tracking
-------------------

    Worklog Id:     (was: 586378)
    Time Spent: 1h  (was: 50m)

> Create new metrics about the number of delta files in the ACID table
> --------------------------------------------------------------------
>
>                 Key: HIVE-24974
>                 URL: https://issues.apache.org/jira/browse/HIVE-24974
>             Project: Hive
>          Issue Type: Sub-task
>            Reporter: Denys Kuzmenko
>            Assignee: Denys Kuzmenko
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 1h
>  Remaining Estimate: 0h
>
> 2 metrics should be collected by each table/partition that exceeds some limit.
>  * Number of used deltas
>  * Number of obsolete deltas
> Both of them should be collected in AcidUtils.getAcidstate call, and only be 
> published if they reached a configurable threshold (to not pollute metrics) 



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