Zoram Thanga created IMPALA-6895:
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Summary: Eliminate SimpleLogger flush threads by inlining 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
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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