The following list shows the most common states you may see in
State column for a slave server SQL
The initial state before
Reading event from the
The thread has read an event from the relay log so that the event can be processed.
The thread is executing a
INFILE statement and is creating a temporary
file containing the data from which the slave will read
The thread has processed all events in the relay log files, and is now waiting for the I/O thread to write new events to the relay log.
A very brief state that occurs as the thread is stopping.
The SQL thread has read an event but is waiting for the
slave delay to lapse. This delay is set with the
MASTER_DELAY option of
CHANGE MASTER TO.
State column for the I/O thread may
also show the text of a statement. This indicates that the
thread has read an event from the relay log, extracted the
statement from it, and is executing it.