MySQL Enterprise Monitor can monitor any MySQL server running MySQL 4.1 or higher. The advisors and rules provide specific support for different versions. For example, there are unique rules and graphs for different MySQL versions, and some rules provide advice about MySQL upgrades.
In addition to monitoring the internal operation of the MySQL server, the MySQL Enterprise Agent and MySQL Enterprise Service Manager can determine the topology of MySQL servers in a replication configuration, and monitor the replication status.
MySQL Enterprise Monitor uses a number of unique values known as
UUIDs to identify the different
components, including the MySQL instance being monitored. UUID
values related to the MySQL instance and the host on which it runs
are stored in a table mysql.inventory within
the instance. MySQL Enterprise Monitor creates this table if it does not exist
already.
Each MySQL Server has a UUID, stored in the
mysql.inventory table, that uniquely
identifies the MySQL server to the rest of MEM. The server
UUID is used to collate information about a single MySQL
instance.
Each host (the machine on which the agent is running) has a
UUID to uniquely identify the host to the rest of MySQL Enterprise Monitor.
This is used to collate the OS information (such as CPU, RAM
and disk data). The host ID also determines whether the MySQL
server is on the same host as it was before, to identify when
data has been moved between machines, or when a machine has
been upgraded. The host UUID is stored within the
hostid row within the
mysql.inventory table.
Each agent has a UUID to identify the agent to MEM. The agent
UUID is defined within the agent-uuid
parameter within the agent configuration file.
These UUIDs are used in combination to register and collate information, and to determine the location and source of an issue.
Because each host must be unique, be careful when restoring from a backup so you do not have hosts with duplicated SSH keys or UUIDs.
You can monitor any MySQL server, because the agent communicates with the MySQL server using the same protocol as any other client. For best results when using MySQL Enterprise Agent with your MySQL Server, follow these guidelines:
Each instance must have a unique ID, as stored within the
mysql.inventory table.
Configure the MySQL server with a user that has the correct permissions and rights to be able to monitor the different parameters of the server. For instructions to create a suitable user, see Section 5.3.1, “Creating a MySQL User Account for the Monitor Agent”.
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