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Slow Query

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It reads the slow query logs from the database and display them as a visual chart. The reference time for a slow query is set in a DB parameter, and the SQL in the slow query log is displayed.

Info

Even for the same SQL, in case of the SQL Elapse Map metric in Monitoring Multiple Instances, an error may occur because the time is calculated based on active sessions.

Before starting​

To use the Slow Query menu, set the following in the cubrid_broker.conf file.

cubrid_broker.conf
SLOW_LOG=ON
LONG_QUERY_TIME=3
Note

To monitor slow queries, be sure to install the XCUB agent on the DB server. For more information about XCUB agent installation, see the following.

Basic screen guide​

slow query

  • Leader line 1 Time / Instance

    You can change the duration of an active session or select individual instances.

    Note

    For more information on how to use the Time option.

  • Leader line 2 Slow Query

    It displays the times of slow queries with a chart. If you drag a specific area with you mouse, you can see information details in Leader line 3 Slow Query List.

  • Leader line 3 Slow Query List

    The slow query details on the area dragged on the Slow Query chart are displayed in the list. If SQL is selected, you can see the (query)'s full text and plan information.

View SQL Details​

To check the SQL query information of the current running session, select the SQL column in the Slow Query List section. The SQL details window appears. You can check the SQL query statements and plan information.

Click the View SQL Statistics → button to move to SQL statistics,
where you can view statistical information related to the selected SQL query.

SQL details

  • Default Bind: You can bind the part set as a variable in the query sentence to the default value.

  • Reset Bind: You can release the bound default value and check the variable.

  • Formatting: You can improve readability by applying indentation and formatting to a SQL query statement.

  • Plan: To check plan information, enter DB Name, User Name, and Password, and then select Search icon.

Viewing the default plan​

When creating the default plan user file, you can configure the agent to automatically view the plan by using the predefined DB information. After checking the box for Default plan inquiry, search for the plan through the specified DB connection information as follows.

  1. Add the plan_db option to the agent configuration (whatap.conf) file and then enter the DB name.

    whatap.conf
    plan_db=(dbname)

  2. After configuring the DB, use the planuid.sh script to set the user and password.

    ./planuid.sh user pwd
    Note

    If the user (user) and password (pwd) include special characters, add backslashes (\) before each special character.

    e.g. user$example → user\$example