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https://issues.apache.org/jira/browse/IMPALA-6895?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tim Armstrong resolved IMPALA-6895.
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Resolution: Won't Do
> Reduce flush, close and open calls in SimpleLogger::flush()
> -----------------------------------------------------------
>
> Key: IMPALA-6895
> URL: https://issues.apache.org/jira/browse/IMPALA-6895
> Project: IMPALA
> Issue Type: Improvement
> Components: Backend
> Affects Versions: Impala 3.0
> Reporter: Zoram Thanga
> Priority: Minor
> Labels: ramp-up
>
> Currently, SimpleLogger provides a Flush() interface which is used by its
> client(s) to periodically (hard-coded to 5 seconds) flush the log file. We
> could eliminate these flush threads by keeping track of last flush time, and
> have the caller of SimpleLogger::AppendEntry() flush on demand (now -
> last_flush_time >= 5 seconds or whatever).
> This has the added benefit of reducing contention on the
> SimpleLogger::log_file_lock_ mutex to just between the threads adding entries
> to the log file.
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