Monitoring a Database Instance

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In Monitoring a Database Instance, you can monitor the key metrics of the database server, information details on active sessions, lock tree, PQ tree, and process information in real time. You can also see the alerts that could be problematic warnings. By default, the collected data for the last 10 minutes is retrieved in real time. Collected data is updated every 5 seconds.

Basic screen guide

Selecting the lookup time and target

By default, the collected data for the last 10 minutes is retrieved in real time. If you select values in Time and Instance, the collected data is automatically applied to the graph chart and Active sessions table.

• To view the past data, click the green button in Time and then select the desired lookup time. You can search data up to the last 3 weeks.

• To query a random date and time, select the button in Time. If you click the text range for date and time, the option appears to select the date and time. To search data in real time again, select .

• To search data from other agents, click Instance and then select a desired agent name.

Graph chart section

Default displays 16 metrics saved as presets as a graph chart widget. The horizontal axis of each widget is time, and the vertical axis is the metric number. To know the meaning of each metric, select next to the name or see the following.

• To change the position with another widget, select and drag the upper part of the widget. However, the size of the widget cannot be changed.

  

• If you stop the real-time query mode of the time and click a specific time on the chart in the widget, you can check the session performed at the selected time in the Active sessions table. After that, a time bar that allows you to view the data every 5 seconds appears on the Active sessions table.

  Note

  • The selected time can be seen on the upper right of the Active sessions table.

  • In the Active sessions table list, the text colors are changed black → orange → Red, which means that the performance of the session is getting slower.

• After stopping the real-time query mode, you can download the chart data as a CSV file by clicking the button on the upper right of the widget.

Active Sessions / Lock Tree / Process Info

You can search active sessions, lock trees, and processes information in real time. If you select a specific time of the chart in the widget, the real-time inquiry mode is stopped and the session performed at the selected time appears in the table. A time selection button appears above the table to search data in 5-second increments.

• Active sessions

  You can view active sessions and queries. If you select an item in the rightmost query column in the table, the SQL details window appears. You can see the full text and plan information for the selected query. For more information, see the following.

• Lock tree

  You can see the lock session information, and holder and waiter information in real time. For more information about the table columns, see the following.

• Process Info

  You can query the resource usage of the database server in real time.

Note

• In the table list, the text colors are changed black → orange → Red, which means that the performance of the session is getting slower.

• The Process Info can be checked only when the XOS agent has been installed. For more information, see the following.

Selecting metrics

To add or replace the metric graph to the widget, select on the upper right of the widget. The Select a metric window appears. After completing the desired settings, select Save.

• Preview: You can preview the graph for the selected metric.

• Title: Enter the widget name.

• It displays the metrics displayed on the chart of the selected widget. You can select up to 4 metrics.

  Note

  When you select on the right of a metric, the Event Configuration New menu appears, where you can configure the alerts based on the metric.

• Recommendation Metrics / All Metrics: If you select Recommendation Metrics, the list of frequently viewed metrics in Database Monitoring appears. The metrics displayed in the list can be changed or added in the widget.

• In the area, you can see the trend of metrics in a graph and add or change any widget. By selecting a desired tab, you can narrow down the list of metrics according to the category.

Adding metrics

Multiple metrics can be added in a widget. You can add up to four metrics.

1. Select on the upper right of the widget to add the metrics in.

2. If the Metric Select window appears, in the metrics list or graph list, select on the right of the metric to add.

3. To add more metrics, repeat the step 2.

4. To easily identify the widget, change the Title.

5. Select Save on the lower right of the screen.

Charts are generated as many times added to the widget to which metrics are added. If you select next to the widget name, you can see the name and description of the added metric. You can also check the figure through a tooltip by hovering your mouse over the chart.

Note

The tooltip of the button is not supported in multiple languages.

Changing a metric

You can change a metric in the widget to another.

1. Select on the upper right of the widget to change the metrics in.

2. If the Metric Select window appears, select a metric to change in the area.

3. In the metrics list or graph list, select a desired metric.

4. In the area, check that the name of the selected metric has been changed.

5. Select Save on the lower right of the screen.

Deleting a metric

You can delete unnecessary metrics while multiple metrics have been set in the widget.

1. Select on the upper right of the widget to delete the metrics from.

2. If the Metric Select window appears, select on the right of the metric to delete from the area.

3. Select Save on the lower right of the screen.

Note

At least one metric must be selected for a widget. You cannot delete all metrics in a widget.

Editing a dashboard widget

The widgets on the dashboard can be adjusted to the desired size and placed in the desired positions. You can also delete unnecessary widgets or add them again.

Resizing a widget

Click and hold the mouse on the element at the lower right of the widget, and then drag it to the desired size. Grids with a uniform horizontal-to-vertical ratio appear and the size of the widget can be adjusted in each grid.

Moving a widget

When you move the mouse cursor to the top of the widget, the cursor shape changes to . At this time, you can move the widget by dragging with your left mouse button and move to the desired position.

Deleting a widget

Right-click on a widget to delete. If you select Delete, the widget is deleted from the dashboard.

Adding a widget

Move the mouse cursor to an empty space on the dashboard and then right-click on it. Select a widget to add from the pop-up menu. Place the widget to the desired position and then resize it.

Custom widget

The custom widget feature allows users to add their own metrics in addition to the metrics provided by default on the dashboard. If you have metrics to continuously monitor on the dashboard in addition to the metrics provided by default, use the custom widget feature.

Add

1. Right-click an empty space on the dashboard.

2. On the pop-up menu, select Add Custom Widgets.

3. If Custom Widget is created on the dashboard, select Select indicator.

   

4. When the Add Custom Widgets window appears on the right of the screen, enter the widget name in Title.

   

5. In the metrics list at the bottom of the screen, select the button on the upper right of the metric to add.

6. After the metric has been changed, select Save.

Note

• You can add up to four metrics. To add metrics, select .

• Ti change the metric, select a different metric in the metrics list. If you select , the metric is added.

• If you do not enter the widget title, it is saved as a custom widget.

Selecting the chart type

In chart type of the Add Custom Widgets window, you can select the following types.

• Series: Time series chart that displays the metric changes over time.

• Equalizer: Bar graph chart that can compare the performance for multiple metrics. By visually displaying various metrics on one screen, you can easily see the overall performance status.

• Pie: Pie chart useful for checking the composition ratio for multiple metrics relative to the whole.

• Text: It displays the figures for the metrics in text.

Changing a metric

You can change or add metrics for the metrics added to the custom widget.

1. Select on the upper right of the custom widget added on the dashboard.

2. When the Add Custom Widgets window appears on the right of the screen, select a metric to change.

   

3. Select a metric to change from the metric list at the bottom of the screen. To add a metric, select on the upper right of the metric to add.

4. After the metric has been changed, select Save.

Tip

The features of the icon buttons in the list for added or changed metrics are as follows:

• : You can exclude the metric from the custom widget.

• : You can set the alert for the metric. When the button is selected, the Alert > Event Configuration appears. For more information about the Metrics event setting, see the following.

Using the widget options

The icons displayed on the widget function as follows:

• : You can see the features and information for major widgets. (multilingual support planned)

• or : You can enlarge or reduce the range of the vertical axis.

• : You can view the widget's data on a wider screen.

• : A detail window appears where you can search the data of the widgets separately by agent.

Note

The provided options may differ depending on the widget.

Preset

You can save and recall user-defined widget settings and active session table arrangements as presets. The Default preset cannot be modified.

Save Preset

In the Preset list, select a saved item to fetch the settings.

1. Add or modify the widget metrics.

2. On the upper right of the screen, select .

3. In Save preset, change the name and then select Save.

Note

• The Default preset cannot be modified.

• Depending on the database environment, some presets may not be supported.

• Including the modified metric graph, the column order, column width, and filter application content of the active sessions are also applied for custom presets.

• You can save or modify the presets with the Edit project role. For more information about the member roles, see the following.

Creating a preset

1. Place the widgets in the desired format on the dashboard. You can also resize and place only the widgets to be frequently checked.

2. On the upper right of the screen, click the icon.

3. Enter a new preset name.

4. Click Save. You can see the newly saved preset from the preset list.

Note

• If any changes are made to the newly created preset, save the preset again. Click the icon and then save the preset with the same name. Any changes are overwritten in the existing preset.

• If you go to another menu without saving changes on the dashboard, the changes are not saved.

• Presets are saved on a project basis and can be shared with other users.

Deleting presets

If you select Preset on the upper right of the screen, the preset list appears. Select on the right of the preset to delete.

Using the active session section

Through Active sessions at the bottom of the screen, you can see the real-time active sessions. The following provides the guide for the button on the upper right of the table.

• : Using the column header entries in the table, the list can be filtered.

• : The list of tables is refreshed.

• : The column header entries in the table can be displayed or hidden.

• : The active session can be stopped.

  Note

  This feature is only available to the members with Edit role. For more information about member roles, see the following.

• : You can download the content of the table as a CSV file.

• : A new window appears to see the list on a wider screen.

Checking the SQL statistics

You can see the list of top SQLs for the time period along with the trend of key performance metrics that occurred during the specific time in the past.

1. In Time, select to switch from real-time mode to non-real-time mode.

2. In Time, set the time zone to view.

3. On the upper right of the Active sessions area, select SQL statistics.

SQL statistics appears in a new window. In Instance monitoring, you can see the top SQL list executed for the set time. For more information about SQL statistics, see the following.

View SQL Details

To check the SQL query information of the executing session, select the query (or sql_text) column in the Active sessions 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.

• 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 .

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.

Linux

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

Windows

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.bat script to set the user and password.

   planuid.bat user pwd

Stopping an active session

1. Select on the upper right of the table.

2. Select the session to stop from the table list. You can select multiple items.

3. Select Stop.

4. If the Session kill window appears, enter the password (Parameter Key). You can check the password in the [paramkey.txt] file located in the agent installation directory.

5. Select Apply. The selected session is stopped.

Note

• Through the paramkey.txt file in the DBX agent installation path, you can find the password.

• This function can be used by only the members with the Edit role. For more information about the member roles, see the following.

Zooming in the graph chart section

If the current screen is small and difficult to check the widgets, you can see the graph chart widget on a wider screen. Select at the bottom of the Active sessions section. The Active sessions section is collapsed and the graph chart widget section is expanded.

To zoom out the graph chart widget, select at the bottom of the Active sessions section.

Setting 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 Confirm 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.

• Images may differ depending on the product, project, or menu.

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 Initialized.

Filtering the table data

1. Select on the upper right of the table.

2. Select a column header and a condition in the table.

3. Enter a desired value in the Enter conditions field.

4. Select Save.

Column information guide

Active session

Item	Description
instance	Agent or instance name.
pid	PID of the database process.
dbname	Name of the connected database.
user	User name connected to the database.
query_time	Query execution time.
transtatus	Current state of the transaction.
query	Executed SQL query.
query_hash	Hash value of the query.
query_param	Parameters used for a query.
program	Program information executed by the client.
tranindex	Unique number that identifies the running transaction.
tran_time	Time elapsed since the transaction began.
sql_id	Unique ID for the running SQL query.
time	Task operation time
lock_holder	Session that has locked the resources in the current transaction.

Lock tree

Item	Description
instance	Agent or instance name.
pid	PID of the database process.
tranindex	Unique number that identifies the running transaction.
user	User name connected to the database.
query_time	Query execution time.
transtatus	Current state of the transaction.
query	Executed SQL query.
query_hash	Hash value of the query.
query_param	Parameters used for a query.
lock_holder	Session that has locked the resources in the current transaction.

Process information

The following items are the metrics collected if the XOS agent has been installed.

Item	Description
cputime	CPU usage time
cpuusage	CPU Utilization
elapse	Elapsed time of CPU usage
vsize	Virtual memory size (Kb)
rss	Resident Set Size (RSS) that is the number of physical pages associated with the process.
state	Process status
ioread	Actual time spent reading the block (milliseconds)
iowrite	Actual time spent writing the block (milliseconds)
pss	Process specific memory usage + Percentage of shared memory occupied by one process
uid	user id
cmd	Executing command
longcmd	Full path of cmd

Note

WhaTap basically stores the client-related information.