Fixes a fatal problem in 3.22.17 on Linux; after
            shutdown not all threads died properly.
          
            Added option -O flush_time=# to
            mysqld. This is mostly useful on Windows
            and tells how often MySQL should close all unused tables and
            flush all updated tables to disk.
          
            Fixed problem that a VARCHAR column
            compared with CHAR column didn't use keys
            efficiently.
          
This is a translation of the MySQL Reference Manual that can be found at dev.mysql.com. The original Reference Manual is in English, and this translation is not necessarily as up to date as the English version.

