SQL statistics

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Statistics are created based on the SQL execution count, execution time, and waiting time within the active sessions collected by the agent, and a list of top SQLs for the search period is provided. It provides a basis for analyzing frequently performed SQL performance through the average and maximum execution time.

For quick performance analysis, you can search top SQLs for each frequently analyzed category (DB, application, user, host). The main search criteria are as follows:

• execute count: Execution count of the SQL

• elapse sum (sec): Total execution time (secs) of the SQL

• elapse avg (sec): Average execution time (sec) of the SQL. It is the result of elapse sum/execute count.

• elapse max (sec): Maximum execution time (sec) of the SQL

• elapse wait (sec): Total waiting time (sec) of the SQL

• instance: Instance name

Info

The SQL statistics function creates statistics based on the SQL that excludes literal values.

Basic screen guide

1. In Time, select the time and date to view the data. You can select a lookup time after selecting the green button.

2. In Instance, select a target to view the data. You can select multiple instances. To select all instances, click Select all.

3. Select .

The top 50 entries appear in the table.

Note

• Select the clock display area to query a random date and time. If you click the date and time text area, the selectable options for the date and time appear.

• If you select each column in the table header, you can sort the list by the selected item.

• You can sort the searched results by the item selected in Sort by. Select a desired item and then select .

• In View count, you can set the number of entries to display in the table. Finish the settings and then select .

• To download the viewed data as a CSV file, select .

Checking the query-based execution trend

To classify and view data by usage category, select the desired tab from .

On the utmost left for each item of the table, select ►. A chart appears that displays the number of executions every 5 minutes and the average execution time of the query statement. If you hover your mouse over each bar graph, you can see the number of that time.

Note

If you select a bar graph for the desired time in the graph chart, the Monitoring a Database Instance menu appears. You can see the metrics for the selected time. For more information about Monitoring a Database Instance, see the following.

Previewing the query

You can preview the query statement by moving the mouse pointer to the sql column in the search results list.

See details

If you select sql from the searched result list, the SQL details window appears.

• View SQL Statistics: You can go to the SQL statistics menu where you can check statistical information related to the SQL query statement.

• 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 .

  • Text: You can check plan information in text format.

  • JSON: By viewing the plan information in Json format, you can quickly find the points where bottlenecks occur.

  Note

  The function to view plan information in JSON format is supported only in DBX agent 1.6.12 or later.

Checking the information details

When the bar graph is selected in the chart, the Session detail window appears where you can check statistical data for 5 minutes. The list of SQL executions appears for the selected time. When an item is selected, it goes to the Instance monitoring menu with a new window.

In Instance monitoring, you can check active sessions in the table and trends of various metrics in the selected time zone.

Filtering the searched results

Adding the filter conditions

You can perform a search by filtering by SQL text, agent name, DB user name, and the like.

1. In the Filter option, select .

2. In Filter key, select a desired filtering criteria.

   • If the value of the selected item is text, you can select any of Includes (blue) and Excludes (red).

     

   • If the value of the selected item is number, you can select any condition of == (equal to), >= (greater than or equal to), and <= (less than or equal to).

3. In Condition, select a condition.

4. Enter a string or number to match the condition.

5. Select Apply.

Note

• To add filtering conditions, select Add and then repeat Step 1 to 5. Added conditions are applied based on AND (&&).

• To delete some items while adding conditions, select on the right of the filter conditions. To delete all conditions, select Delete All.

• To quickly delete the conditions applied to the Filter option, select .

• The default setting is to exclude if sqlText contains 'WhaTap'.

  

Modifying the filter conditions

Click any applied to the Filter option. If the Edit filter window appears, modify any desired items and then select Apply.

Configuring the table columns

You can hide the table header columns or add any of them. You can also change the column order. Select .

Note

• After configuration, select OK to apply the settings in the table.

• In the search bar, enter text to search the desired columns. Only the columns that meet the entered text are displayed.

Adding columns

From the list, select the items to add as table header columns. To select all items, select Select All.

Deleting columns

From the list, unselect the columns to delete. Alternatively, select on the right of the item to delete from the list.

Changing the column order

Drag an item to reposition from the list, and then move it to the desired position.

Initializing the configuration

To cancel all changes and reset them, select Reset.