Chapter 21 Using the Query Analyzer

Table of Contents

21.1 Providing Query Analyzer Data
21.1.1 Using the MySQL Performance Schema
21.1.2 Using the MySQL Enterprise Plugin for Connector/J
21.1.3 Using the MySQL Enterprise Plugin for Connector/PHP
21.1.4 Using the MySQL Enterprise Plugin for Connector/Net
21.1.5 Using the 2.3 MySQL Enterprise Agent Aggregator
21.1.6 Using the 2.3 Agent Proxy
21.2 Query Response Time index (QRTi)
21.3 Query Analyzer User Interface
21.3.1 Getting Detailed Query Information
21.3.2 Using Graphs to Identify Queries
21.3.3 Filtering Query Analyzer Data
21.3.4 Query Analyzer Settings
21.3.5 Exporting Query Information

The MySQL Query Analyzer enables you to monitor SQL statements executed on a MySQL server and see details about each query, number of executions and execution times. Similar queries with different literal values are combined (normalized) for reporting purposes.

Query Analyzer collects information about SQL statements that a MySQL client application sends to the MySQL server. There are different methods that the Query Analyzer can receive this information, which are:

Once your MySQL client application is configured to communicate via the MySQL Enterprise Monitor Agent, queries are monitored and the normalized queries are sent to the MySQL Enterprise Monitor Agent.

For the different ways to enable Query Analysis, see Section 21.1, “Providing Query Analyzer Data”. For the user interface of the Query Analyzer, see Section 11.2, “The Query Analyzer” and Section 21.3, “Query Analyzer User Interface”.

Important

The 2.3 MySQL Proxy component and Query Analyzer require that clients connecting through MySQL Enterprise Monitor Agent use MySQL 5.0 or later. Clients that use the libmysqlclient library provided with MySQL 4.1 or earlier do not work with MySQL Enterprise Monitor Agent.

Once the data is collected, you view and monitor the queries, check the execution statistics, and filter and drill down on the information. By comparing the queries to the server graphs, you can correlate query execution with server status. For more information on viewing, filtering and reporting on the Query Analyzer data, see Section 21.3, “Query Analyzer User Interface”.

Note

When MySQL Enterprise Monitor is not accessible from a Connector/J or Connector/NET query analyzer plugin, then the application performance will not be impacted. Over time, the plugin will determine that a backlog of reportable data exists, and fall back to consolidating it over longer ranges of time. But if more than 1,000 canonical queries are being used by the application (an unlikely scenario), then data will begin to be dropped.

Note

MySQL Enterprise Monitor is available as part of the MySQL Enterprise subscription, learn more at http://www.mysql.com/products/.