How to register "mod_alias" logs into error_log file

I am testing redirect rules in a htaccess file.
I am using
LogLevel alert rewrite:trace6

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to register logs for "mod_rewrite" module into error_log file however, I do not know how to register log for "mod_alias" modules. when I use mod_alias redirect rules such as redirect / redirectmatch , error_log display only "pass through"
Amit KumarAsked:
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Steve BinkCommented:
There is no separate logging facility for mod_alias.  Also, mod_alias does not mangle or alter URLs - it only maps a URL to the file system.  

When you use a Redirect* directive, mod_alias is simply setting a response status, e.g., 301Moved Permanently.  Those response codes are logged (by default) as part of the standard apache log format.  In that sense, you can make sure mod_alias is being logged by using the default log format, or by including %>s in any custom log formats you create.

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mod_alias is loaded in core, there are no logs of physical paths and you can dig physical paths from request URIs.
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