Hi,
Again, sorry, but it does have a file loaded at startup of the MySQL server, it is:
J:\wamp\bin\mysql\mysql5.6.20\my.ini
For proof, just change a directive in this file, for example, replace
log-error=J:/wamp/logs/mysql.log
by
log-error=J:/wamp/logs/mysql_test.log
and at the next start, this is the file mysql_test.log that is filled.
2014-09-24 13:59:08 4652 [Note] InnoDB: Using atomics to ref count buffer pool pages
2014-09-24 13:59:08 4652 [Note] InnoDB: The InnoDB memory heap is disabled
2014-09-24 13:59:08 4652 [Note] InnoDB: Mutexes and rw_locks use Windows interlocked functions
2014-09-24 13:59:08 4652 [Note] InnoDB: Memory barrier is not used
2014-09-24 13:59:08 4652 [Note] InnoDB: Compressed tables use zlib 1.2.3
2014-09-24 13:59:08 4652 [Note] InnoDB: Not using CPU crc32 instructions
2014-09-24 13:59:08 4652 [Note] InnoDB: Initializing buffer pool, size = 16.0M
2014-09-24 13:59:08 4652 [Note] InnoDB: Completed initialization of buffer pool
2014-09-24 13:59:08 4652 [Note] InnoDB: Highest supported file format is Barracuda.
2014-09-24 13:59:08 4652 [Note] InnoDB: 128 rollback segment(s) are active.
2014-09-24 13:59:08 4652 [Note] InnoDB: Waiting for purge to start
2014-09-24 13:59:08 4652 [Note] InnoDB: 5.6.20 started; log sequence number 4371307
2014-09-24 13:59:08 4652 [Note] Server hostname (bind-address): '*'; port: 3306
2014-09-24 13:59:08 4652 [Note] IPv6 is available.
2014-09-24 13:59:08 4652 [Note] - '::' resolves to '::';
2014-09-24 13:59:08 4652 [Note] Server socket created on IP: '::'.
2014-09-24 13:59:08 4652 [Note] Event Scheduler: Loaded 0 events
2014-09-24 13:59:08 4652 [Note] wampmysqld: ready for connections.
Version: '5.6.20' socket: '' port: 3306 MySQL Community Server (GPL)
And that is the purpose of my original question, there is no knowing what the initialialisation file that was loaded when the server starts.