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Re: 5.6 to 5.7 row-based replication performance issue
Posted by: Peter Brawley
Date: October 28, 2020 09:21AM

> sql thread is the one lagging.
> Slave_SQL_Running_State on the 5.7 replica occasionally shows "System lock"

See if doing pager grep Query, then show processlist; identifies queries that are slow, and/or enable performance_schama SQL,IO,Replication instruments.

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