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Monitoring slave status from master
Posted by: harry sheng
Date: March 19, 2014 09:25AM

Hi, I want to do basic monitoring of the slave status by querying the master.

I've tried "show processlist" and "show slave hosts". They display the information on connected slaves, but seem to have a bit of lag to reflect a disconnected slave, one minute or so in my test. I've also seen that the "show processlist" does not list the replication processes (COMMAND=Binlog Dump), but the updates to the master are replicated to the slaves.

My question is, how reliable it is to use those command for basic monitoring and how fast will a disconnected slave be reflected to their output?

Thanks

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