This agent monitors instances of SQL Server and dynamically creates a number of entities and counters holding details about server's operations. Note that these statistics are only updated while the agent is running; SQL Server's activity will not be traced when the agent is stopped.
Note that more performance counters can be retrieved through the Windows agent. When using Windows agent on the host where SQL Server is installed, additional entities will appear in the tree.
The agent supports both local and remote modes, provided that it can open a database connection to the SQL Server from the machine it is deployed on. By default the standard SQL Server ODBC driver is used through the Java JDBC/ODBC bridge. If required it can be replaced with a different driver.
For the purposes of license management it may be important to know that the agent uses one database connection for as long as it's running, closing it when it is stopped. When agent is stopping, a second connection is briefly opened and closed.
This agent supports Microsoft SQL Server 7.0, SQL Server 2000 and SQL Server 2005.
Note that by default a SQL server instance is configured for Windows authentication, which requires the remote user to a valid Windows user for the server machine. As this may not always be the case, a better option would be to enable SQL Server authentication, which will allow you to specify an user and password. To enable SQL Server Authentication select the Security tab on the server properties in Enterprise Manager:
The following configuration options are available:
- Username: user name to use when connecting to SQL Server.
- Password: password to use when connecting to SQL Server.
- Instance: either the server name, or the server and instance name to connect to, in the form "serverName\instanceName".
- JDBC string (optional): allows you to specify the raw JDBC connection string, for example if you wish to use a different driver to connect to SQL Server. The above username, password and instance will be ignored when this is set.
- JDBC class: when using a custom JDBC string, you can also specify a different JDBC class (the default is Sun's JDBC/ODBC bridge).
- Cursors: Set to enable cursor events (required by Cursors entity). Disable to improve performance
- Database: Set to enable database events (required by Database entity). Disable to improve performance
- Errors: Set to enable tracing error events (required by Errors entity). Disable to improve performance
- Locks: Set to enable tracing lock events (required by Locks entity). Disable to improve performance
- Scans: Set to enable tracing table scan events (required by Scans entity). Disable to improve performance
- Sessions: Set to receive existing session information events (required by Sessions entity). Disable to improve performance
- Stored Procedures: Set to enable tracing stored procedure and remote calls events (required by Stored Procedures entity). Disable to improve performance
- Transactions: Set to enable tracing transaction events (required by Transactions entity). Disable to improve performance
- TSQL: Set to enable tracing Transact SQL execution events (required by TSQL entity). Disable to improve performance
Note that counters returned by this agent are dynamically calculated while the agent is attached to SQL Server. They will not be updated for operations which occur while the agent is not running.
- Cursors: traces cursor operations, such as the number of cursors opened, closed or executed.
- Database: contains counters for data file operations, such as the number of file grows and shrinks.
- Errors: holds statistics with the number of various error and warning events.
- Locks: contains counters with the number of locks operations, such as number of locks acquired, released and deadlocks.
- Scans: traces the number and duration of table scan operations.
- Sessions: maintains a list of SQL Server client sessions. This will also include information for sessions started before the agent was activated.
- Stored procedures: Traces details of stored procedure calls, including the SQL text, duration and CPU usage.
- Transactions: contains counters with details for SQL transactions, such as the number of begin/commit/rollback operations, and total transaction time.
- TSQL: holds details for every SQL statement executed by SQL Server, including the text, number of reads/writes and CPU usage.