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How to delay slave replication in MySQL support?
The answer for this problem is a delayed slave replication, It’s actually you are intentionally lagging MySQL slave to a master by few minutes / hours so that you have always a MySQL instance far from damage. There are two ways to do this, 1. MySQL delayed slave replication , 2.
What should I look for in MySQL replication?
It is asynchronous and single-threaded (by default), but replication also allows you to configure it to be synchronous (or actually “semi-synchronous”) and can run slave thread to multiple threads or in parallels. This idea is very common and usually arrives with a simple setup, making its slave serving as its recovery or for backup solutions.
Why is MySQL slave lagging on SQL thread?
For instance, if a long-running read against a MyISAM table blocks the SQL thread or any transaction against an InnoDB table creates an IX lock and blocks DDL in the SQL thread. Also, take into account that slave is single threaded prior to MySQL 5.6, which would be another reason for delays on the slave SQL_THREAD.
Why is my Slave lagging behind the Master?
I have a master/slave replication on my MySql DB. my slave DB was down for a few hours and is back up again (master was up all the time), when issuing show slave status I can see that the slave is X seconds behind the master. the problem is that the slave dont seem to catch up with the master, the X seconds behind master dont seem to drop…
Why is MySQL replication lagging behind Master stack?
If Exec_Master_Log_Pos does not move after a minute, you can go ahead run START SLAVE IO_THREAD;. This may reduce the number of Seconds_Behind_Master. Other than that, there is really nothing you can do except to: Run SHOW PROCESSLIST;, take note of the SQL thread to see if it is processing long running queries.
What does seconds behind mean in MySQL replication?
“seconds behind” isn’t a very good tool to find out how much behind the master you really is. What it says is “the query I just executed was executed X seconds ago on the master”. That doesn’t mean that you will catch up and be right behind the master the next second.