[
https://issues.apache.org/jira/browse/HIVE-25842?focusedWorklogId=710713&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-710713
]
ASF GitHub Bot logged work on HIVE-25842:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 18/Jan/22 18:13
Start Date: 18/Jan/22 18:13
Worklog Time Spent: 10m
Work Description: klcopp commented on a change in pull request #2916:
URL: https://github.com/apache/hive/pull/2916#discussion_r787028622
##########
File path:
ql/src/java/org/apache/hadoop/hive/ql/txn/compactor/metrics/DeltaFilesMetricReporter.java
##########
@@ -398,13 +156,6 @@ private static long getBaseSize(AcidDirectory dir) throws
IOException {
return baseSize;
}
- private static long getModificationTime(AcidUtils.ParsedDirectory dir,
FileSystem fs) throws IOException {
- return dir.getFiles(fs, Ref.from(false)).stream()
- .map(HadoopShims.HdfsFileStatusWithId::getFileStatus)
- .mapToLong(FileStatus::getModificationTime)
- .max()
- .orElse(new Date().getTime());
- }
private static long getDirSize(AcidUtils.ParsedDirectory dir, FileSystem fs)
throws IOException {
Review comment:
Do you think that collecting metrics about small deltas is worth the
amount this might slow down the Initiator/Worker/Cleaner?
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: gitbox-unsubscr...@hive.apache.org
For queries about this service, please contact Infrastructure at:
us...@infra.apache.org
Issue Time Tracking
-------------------
Worklog Id: (was: 710713)
Time Spent: 3h (was: 2h 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: 3h
> 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.
--
This message was sent by Atlassian Jira
(v8.20.1#820001)
