Some forms of the FLUSH
statement
are not logged because they could cause problems if replicated
to a slave: FLUSH
LOGS
, FLUSH
MASTER
, FLUSH
SLAVE
, and
FLUSH TABLES WITH READ
LOCK
. For a syntax example, see
Section 12.4.6.3, “FLUSH
Syntax”. The
FLUSH TABLES
,
ANALYZE TABLE
,
OPTIMIZE TABLE
, and
REPAIR TABLE
statements are
written to the binary log and thus replicated to slaves. This is
not normally a problem because these statements do not modify
table data.
However, this behavior can cause difficulties under certain
circumstances. If you replicate the privilege tables in the
mysql
database and update those tables
directly without using GRANT
, you
must issue a FLUSH
PRIVILEGES
on the slaves to put the new privileges
into effect. In addition, if you use
FLUSH TABLES
when renaming a MyISAM
table that is part of
a MERGE
table, you must issue
FLUSH TABLES
manually on the slaves. These statements are written to the
binary log unless you specify
NO_WRITE_TO_BINLOG
or its alias
LOCAL
.
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