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https://issues.apache.org/jira/browse/CASSANDRA-14326?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16406387#comment-16406387
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Paulo Motta commented on CASSANDRA-14326:
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bq. The only thing I can think of that will be a bit odd, is to have two
different logs, both having INFO messages with one being a superset of the
other.
We could add a new marker INFO-VERBOSE, that is logged asynchronously to
verbose-system.log (former debug.log). Admins would typically only look at
system.log, and only go to verbose-system.log when facing problems,
troubleshooting issues or wanting to perform advanced tuning, etc. Ultimately
advanced operators could still disable the system-verbose.log if/when they're
not interested in that.
> Handle verbose logging at a different level than DEBUG
> ------------------------------------------------------
>
> Key: CASSANDRA-14326
> URL: https://issues.apache.org/jira/browse/CASSANDRA-14326
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Alexander Dejanovski
> Priority: Major
> Fix For: 4.x
>
>
> CASSANDRA-10241 introduced debug logging turned on by default to act as a
> verbose system.log and help troubleshoot production issues.
> One of the consequence was to severely affect read performance in 2.2 as
> contributors weren't all up to speed on how to use logging levels
> (CASSANDRA-14318).
> As DEBUG level has a very specific meaning in dev, it is confusing to use it
> for always on verbose logging and should probably not be used this way in
> Cassandra.
> Options so far are :
> # Bring back common loggings to INFO level (compactions, flushes, etc...)
> and disable debug logging by default
> # Use files named as verbose-system.log instead of debug.log and use a
> custom logging level instead of DEBUG for verbose tracing, that would be
> enabled by default. Debug logging would still exist and be disabled by
> default and the root logger level (not just filtered at the appender level).
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