Multi-threaded replication is a new feature introduced in MySQL 5.6 and MariaDB 10.0. In traditional single-threaded replication, the slaves have a disadvantage as they have to process in sequence what a master executed in parallel. This, plus the fact that slaves usually have a lot of read-only connections to deal with as well, can easily create performance problems. That is, a single-threaded slave needs to be set to allow fewer connections, otherwise there’s a higher risk of it not being able to keep up with the replication stream. There is no exact rule for this, as it relates to general I/O capacity and fsync latency, as well as general CPU and RAM considerations and query …
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Nov
18
2014
Showing entries 1 to 1