Accessing impact of deleting ibtmp1 file in MYSQL
That file comes from MySQL 5.7, not 5.6. You can check by connecting to MySQL and running:

mysql&gt; SELECT VERSION();


Shrinking ibtmp1 would require shutting down MySQL. You cannot just the delete the file because there will be a open file handle on that file coming from mysqld.exe.

First, log into MySQL and run:

mysql&gt; SET GLOBAL innodb_fast_shutdown = 0;


Next, shutdown MySQL, delet the file and start mysql back up:

C:\&gt; net stop mysql
C:\&gt; del ibtmp1
C:\&gt; net start mysql


If your ibtmp1 grew that much, then you have been running some bad queries that create large temp tables.