what version is slave_compressed_protocol supported?

[Duncan Berriman]

Hi,

I see that slave_compressed_protocol is available and all the documentation says that compression will be used if both master and slave support it. It appears this was added in 4.0.3 however I am running 4.0.17-standard and although nothing complains when I add it to my.cnf I can see no affect on the traffic and doing a show global variables does not show the variable.

mysql> show global variables like '%slave%';
+-------------------+-------+
| Variable_name | Value |
+-------------------+-------+
| log_slave_updates | OFF |
| slave_net_timeout | 3600 |
+-------------------+-------+
2 rows in set (0.00 sec)


Does this have to be set on master or slave or both ?

What version is it actually supported in ?

What is meant by 'support it', is this reliant on a certain version, build, option ...?

Thanks
Duncan Berriman