Message compression
The network plays a very important role, both in terms of latency and bandwidth. Message compression is a feature of the group communication system API, where we can specify the ratio of the message compression. It can provide up to 30-40% throughput improvement at the group communication level. It is required because group replication topology is a TCP peer-to-peer interconnection between n participants on the group who send and receive the same amount of data n times.
Compression happens in a group communication engine. Before the data is handed over to a GCT, it happens within the context of the MySQL session thread. Transaction payloads may be compressed before being sent out to the group and decompressed when received. ...
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