When a server shuts down and restarts, its
MEMORY tables become empty. The master
replicates this effect to slaves as follows: The first time that
the master uses each MEMORY table after
startup, it logs an event that notifies the slaves that the
table needs to be emptied by writing a DELETE
statement for that table to the binary log. See
Section 14.7, “The MEMORY (HEAP) Storage Engine”, for more information
about MEMORY tables.

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