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I am looking at our CiviCRM install on disk and I notice that files/civicrm/ConfigAndLog is taking up nearly 9GB with all files from 2014-2015.
Looking at them they are just plain text files which sort of look like query results. Most are in the format CiviCRM.<32character_string>.log.YYYYMMDDhhmm some are just CiviCRM.<32character_string>.log
Is it safe to rm these files or do they serve a purpose?
The main use of those logs files is to help diagnose problems in CiviCRM. You're unlikely to want to review problems from a few years ago so you can delete them. The one without the datestamp is the current one and that should have the most recent timestamp.
However 9GB is a lot of log output! It would be worth looking at the recent ones to see if there are current issues that need attention.
