Protocol tracing infrastructure

Since introduction of PERFORMANCE_SCHEMA in MySQL Server, it is possible to trace what happens inside the server when it executes client queries. The client-side protocol tracing framework is a similar mechanism in the MySQL Client Library. It allows tracing communication of the client with the server. The infrastructure has been included in MySQL 5.7.2 Development Milestone Release.

Unlike PERFORMANCE_SCHEMA, focus of the client-side tracing framework is on tracing the protocol flow and client-server I/O rather than the performance of the client library implementation. The client-side tracing framework recognizes trace events which happen during normal conversation between the client and the server. Events such as sending packets to the server, receiving server replies, establishing and terminating a connection are …