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https://issues.apache.org/jira/browse/HADOOP-17295?focusedWorklogId=498658&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-498658
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ASF GitHub Bot logged work on HADOOP-17295:
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Author: ASF GitHub Bot
Created on: 09/Oct/20 16:56
Start Date: 09/Oct/20 16:56
Worklog Time Spent: 10m
Work Description: steveloughran commented on pull request #2358:
URL: https://github.com/apache/hadoop/pull/2358#issuecomment-706292523
> The point is that some simple logging calls are on the hot path and
frequently executed. The accumulated overhead for these simple logging calls is
larger than other complex logging calls rarely executed.
personally
* I prefer the common log operations (info +) to be efficient.
* and debug level logging to have ~0 overhead when not used.
* but enough debug logging for me to work out what is going wrong when
things don't work
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Issue Time Tracking
-------------------
Worklog Id: (was: 498658)
Time Spent: 1h 20m (was: 1h 10m)
> Move dedicated pre-logging statements into existing logging guards
> ------------------------------------------------------------------
>
> Key: HADOOP-17295
> URL: https://issues.apache.org/jira/browse/HADOOP-17295
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Chen Zhi
> Assignee: Chen Zhi
> Priority: Minor
> Labels: pull-request-available
> Time Spent: 1h 20m
> Remaining Estimate: 0h
>
> I find some cases where some pre-processing statements dedicated to logging
> calls are not guarded by existing logging guards. Most of them are easy to
> fix. And the performance and maintainability of these logging calls can be
> improved to some extend. So I create a PR to fix them.
> These issues are detected by a static analysis tool wrote by myself. This
> tool can extract all the dedicated statements for each debug-logging calls
> (i.e., the results of these statements are only used by debug-logging calls).
> Because I realize that debug logs will incur overhead in production, such as
> string concatenation and method calls in the parameters of logging calls as
> well as pre-processing statements. And I want to perform a systematic
> evaluation for the overhead of debugging logging calls in production.
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