MySQL Instance Manager has been deprecated and is removed in MySQL 5.5.
mysqlmanager is the MySQL Instance Manager (IM). This program monitors and manages MySQL Database Server instances. MySQL Instance Manager is available for Unix-like operating systems, as well as Windows. It runs as a daemon that listens on a TCP/IP port. On Unix, it also listens on a Unix socket file.
MySQL Instance Manager can be used in place of the mysqld_safe script to start and stop one or more instances of MySQL Server. Because Instance Manager can manage multiple server instances, it can also be used in place of the mysqld_multi script. Instance Manager offers these capabilities:
Instance Manager can start and stop instances, and report on the status of instances.
Server instances can be treated as guarded or unguarded:
When Instance Manager starts, it starts each guarded instance. If the instance crashes, Instance Manager detects this and restarts it. When Instance Manager stops, it stops the instance.
A nonguarded instance is not started when Instance Manager starts or monitored by it. If the instance crashes after being started, Instance Manager does not restart it. When Instance Manager exits, it does not stop the instance if it is running.
Instances are guarded by default. An instance can be
designated as nonguarded by including the
nonguarded option in the configuration
Instance Manager provides an interactive interface for configuring instances, so that the need to edit the configuration file manually is reduced or eliminated.
Instance Manager provides remote instance management. That is, it runs on the host where you want to control MySQL Server instances, but you can connect to it from a remote host to perform instance-management operations.
The following sections describe MySQL Instance Manager operation in more detail.