Chapter 23 Using the Query Analyzer

Table of Contents

23.1 Providing Query Analyzer Data
23.1.1 Using the MySQL Performance Schema
23.2 Query Response Time index (QRTi)
23.3 Query Analyzer User Interface
23.3.1 Getting Detailed Query Information
23.3.2 Using Graphs to Identify Queries
23.3.3 Filtering Query Analyzer Data
23.3.4 Query Analyzer Settings
23.3.5 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 23.1, “Providing Query Analyzer Data”. For the user interface of the Query Analyzer, see Section 13.2, “The Query Analyzer” and Section 23.3, “Query Analyzer User Interface”.

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 23.3, “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/.