MySQL Shell 8.0
In releases from MySQL Shell 8.0.14 through 8.0.19, compression can be requested only for connections that use classic MySQL protocol. The default is that compression is not requested. Compression in these releases uses the zlib compression algorithm. You cannot require compression in these releases, so if compression is not supported by the server, the session falls back to an uncompressed connection.
In these MySQL Shell releases, compression control is limited
to enabling (by specifying true) or
disabling (by specifying false) compression
for a connection. If you use a MySQL Shell release with this
compression control to connect to a server instance at MySQL
8.0.18 or later, where client requests for compression
algorithms are supported, enabling compression is equivalent
to proposing the algorithm set
zlib,uncompressed.
MySQL Shell cannot request compression in releases before 8.0.14.
To request compression for a connection in MySQL Shell 8.0.14 through 8.0.19, use one of the following methods:
If you are starting MySQL Shell from the command line and
specifying connection parameters using separate command
options, use the --compress
(-C) option, for example:
$> mysqlsh --mysql -u user -h localhost -C
If you are using a URI-like connection string to specify
connection parameters, either from the command line, or
with MySQL Shell's \connect command,
or with the shell.connect() method, use
the compression=true parameter in the
query string:
mysql-js> \connect user@example.com?compression=true
$> mysqlsh mysql://user@localhost:3306?compression=true
If you are using key-value pairs to specify connection
parameters, either with MySQL Shell's
\connect command or with the
mysql.getClassicSession() method, use
the compression parameter in the
dictionary of options:
mysql-js> var s1=mysql.getClassicSession({host: 'localhost',
user: 'root',
password: 'password',
compression: 'true'});