We are working on it to fix as soon as possible.
As a temporary measure the wordpress login pass has been blocked across servers seeing the worst impact, as the botnets are making entire sites stop working due to the loads they put on web and MySQL to process logins.
We are going to restart mysqld on MySQL2 server.
mysqld service is up now.
Now we can see sites are more responsive and database queries are handled timely which mean impact of attack has been minimized but we are still have watch on each server and will try to make things even better.