MySQL Router 9.3
TLS sessions from client to router and router to server can be cached and resumed when needed. This shortens the connection handshake, saving time and resources.
MySQL Router uses the following caches:
Client TLS session cache: Caches TLS session from the client to MySQL Router.
Server TLS session cache: Caches TLS sessions from the MySQL Router to the server.
The following configuration options control the session caching:
Client TLS session cache:
client_ssl_session_cache_mode: Enables
or disables the cache for client-router TLS sessions.
Enabled by default. If this parameter is not set, the cache is enabled. To disable the cache, you must explicitly define it.
client_ssl_session_cache_size: Defines
the maximum number of sessions cached.
client_ssl_session_cache_timeout:
Defines the maximum amount of time, in seconds, a session
remains in the cache. If the timeout is reached, and this
session is not reused, the session is removed from the
cache and the connection is closed.
Server TLS Cache:
server_ssl_session_cache_mode: Enables
or disables the cache for router-server sessions.
Enabled by default. If this parameter is not set, the cache is enabled. To disable the cache, you must explicitly define it.
server_ssl_session_cache_size: Defines
the maximum number of sessions cached.
server_ssl_session_cache_timeout:
Defines the maximum amount of time, in seconds, a session
remains in the cache. If the timeout is reached, and this
session is not reused, the session is removed from the
cache and the connection is closed.