Re: MySQL 5.7.18 and memory ...

[Frederic Descamps]

Hi Adam,

It's true that a server part of a Group Replication is using more memory than traditional master/slave replication. But not as much as you describe it here.

There were some bugs resolved regarding memory leaks in 5.7.19. I would suggest to first try this version.

Also it would be good to see what's going on. Do you have some stats to share from performance schema, from the system or at least the output of SHOW ENGINE INNODB STATUS\G ?

They are plenty reason why MySQL might use too much memory depending on Operating System settings, InnoDB configuration and workload... and eventual bugs too.

So first try with 5.7.19 and if you experience again the pain of OOM killer with MySQL let me know and we will check if we can find what's going on.

Thank you for testing MySQL Group Replication.

lefred.