PRTG Manual: Oracle SQL Sensor

This Sensor Type Is Deprecated!

This sensor type is deprecated. We provide the documentation in this section for your information only. Running sensors of this type will continue monitoring but you will not be able to add sensors of this type anew. We strongly recommend that you replace all sensors of this type with the according v2 version.

Please see the following article for details:

Knowledge Base: Migration Path for Deprecated SQL Sensors

Alternative Sensor Type

Please use the Oracle SQL v2 Sensor instead.

The Oracle SQL sensor monitors an Oracle SQL server. It connects to the server and shows the response time (measured from the time when the connection is opened to the time when the return values of the SQL query—if configured—have been received). Additionally, it can read the number of records and a value.

The following SQL servers are supported: Supports Oracle servers 11g, 10g, 9i, 8i, 8.0, and 7.3, including Oracle 10g Express, and Oracle 8i Personal and Lite editions (requires default TCP port setting 1521).

Note: On the client computer running the PRTG probe where this sensor is created on, Oracle Net is used for direct TCP/IP communication; OCI is not supported any more. You do not need to install an Oracle client or define a TNSNAMES.ORA on the client computer.

Note: With Oracle version 11.2.0.4, Oracle's TCP/IP authentication method has changed. You will encounter connection problems with credential errors when using the direct connection mode as of this Oracle version. In this case, please install the 32-bit Oracle client on the machine which is running the PRTG probe and choose Use Oracle client as connection mode in the sensor settings.

Add Sensor

The Add Sensor dialog appears when you manually add a new sensor to a device. It only shows the setting fields that are required for creating the sensor. Therefore, you will not see all setting fields in this dialog. You can change (nearly) all settings in the sensor's Settings tab later.

Sensor Settings

On the details page of a sensor, click the Settings tab to change its settings.

icon-i-roundUsually, a sensor connects to the IP Address or DNS Name of the parent device where you created this sensor. See the Device Settings for details. For some sensor types, you can define the monitoring target explicitly in the sensor settings. Please see below for details on available settings.

Basic Sensor Settings

Sensor Name

Enter a meaningful name to identify the sensor. By default, PRTG shows this name in the device tree, as well as in alarms, logs, notifications, reports, maps, libraries, and tickets.

Parent Tags

Shows Tags that this sensor inherits from its parent device, group, and probe. This setting is shown for your information only and cannot be changed here.

Tags

Enter one or more Tags, separated by spaces or commas. You can use tags to group sensors and use tag–filtered views later on. Tags are not case sensitive. We recommend that you use the default value.

You can add additional tags to the sensor if you like. Other tags are automatically inherited from objects further up in the device tree. These are visible above as Parent Tags.

Priority

Select a priority for the sensor. This setting determines where the sensor is placed in sensor lists. Top priority is at the top of a list. Choose from one star (low priority) to five stars (top priority).

Oracle Specific Data

Timeout (Sec.)

Enter a timeout in seconds for the request. If the reply takes longer than this value the request is aborted and an error message is triggered.

Port

Enter the port number that will be used for the connection. Default value is 1521. Please enter an integer value.

Connection Mode

Select which mode you want to use to connect to the Oracle server. Choose between:

  • Use direct mode (TCP/IP): Use Oracle Net for direct TCP/IP communication.
    Note: As of Oracle version 11.2.0.4, please use the Oracle client (see sensor description above).
  • Use Oracle client: Use the Oracle client for communication. It needs to be installed the machine which is running the PRTG probe.

DB/SQL Data

Service Name / Alias

Enter the name of the SQL database the sensor will connect to. For example, such a database's name could be orcl

User

Enter the username that will be used for the database connection.

Password

Enter the password that will be used for the database connection.

Data

SQL Expression

Enter a valid SQL statement to execute on the server. In your SELECT statement, please specify the field name explicitly. Do not use SELECT *! For example, a correct expression could be: SELECT sum(salary) FROM hr.employees. When a cursor is returned (i.e. with a SELECT statement), only the first row of data will be processed.

Record Count

If you want to know how many records in your database were affected by your SQL expression as defined above, you can count the number of concerned records. Choose between:

  • Do not count number of records: Disable the counting of affected records. The "Record Count" channel always shows "0" if you choose this option.
  • Count number of records: Show the number of affected records in the "Record Count" channel.
    Note: Enabling this option might increase the execution time of this sensor.

Post-Processing

If the SQL expression returns a result set, define if you want to further process it. Choose between:

  • Ignore result set: Do not process the data returned.
  • Process numerical result: Regard the result set returned as integer or float. You can set the sensor to Warning or Down status for specific thresholds. Define below.
  • Process string result: Regard the result set returned as a string. You can set the sensor to error for certain sub-strings contained or missing. Define below.
  • Monitor for changes: Check if the result set has changed since last sensor scan. The sensor will send an internal message indicating that its value has changed. In combination with a Change Trigger, you can use this mechanism to trigger a notification whenever a sensor value changes.

Condition "Warning"

This field is only visible if you enable numeric results processing above. Define a condition of the returned numeric SQL result set that sets the sensor to a Warning status. Choose between:

  • none: Do not set the sensor to Warning status for any condition.
  • equals: Result set must be the same as the value provided below.
  • is above: Result set must be above the value provided below.
  • lower than: Result set must be below the value provided below.
  • does not equal: Result set must be unequal to the value provided below.

Note: This threshold check the SQL result set only. You can set additional thresholds in the sensor's channel settings.

Value

This field is only visible if you enable numeric results processing above. Enter a value of the returned numeric SQL result set that sets the sensor into a Warning status. Please enter an integer or float value.

Condition "Down"

This field is only visible if you enable numeric results processing above. Define a condition of the returned numeric SQL result set that sets the sensor to a Down status. Choose between:

  • none: Do not set the sensor to Down status for any condition.
  • equals: Result set must be the same as the value provided below.
  • is above: Result set must be above the value provided below.
  • lower than: Result set must be below the value provided below.
  • does not equal: Result set must be unequal to the value provided below.

Note: This threshold check the SQL result set only. You can set additional thresholds in the sensor's channel settings.

Value

This field is only visible if you enable numeric results processing above. Enter a value of the returned numeric SQL result set that sets the sensor to a Down status. Please enter an integer value.

Response Must Include

This field is only visible if you enable string results processing above. Enter a string that must be part of the returned SQL string. If this is not the case, the sensor will show a Down status. Please enter a string or leave the field empty.

Response Must Not include

This field is only visible if you enable string results processing above. Enter a string that must not be part of the returned SQL string. If this is the case, the sensor will show a Down status. Please enter a string or leave the field empty.

Sensor Display

Primary Channel

Select a channel from the list to define it as the primary channel. In the device tree, the last value of the primary channel will always be displayed below the sensor's name. The available options depend on what channels are available for this sensor.

icon-i-roundYou can set another primary channel later by clicking the pin symbol of a channel in the sensor's Overview tab.

Graph Type

Define how different channels will be shown for this sensor.

  • Show channels independently (default): Show an own graph for each channel.
  • Stack channels on top of each other: Stack channels on top of each other to create a multi-channel graph. This will generate an easy-to-read graph that visualizes the different components of your total traffic.
    icon-i-roundThis option cannot be used in combination with manual Vertical Axis Scaling (available in the Sensor Channels Settings settings).

Stack Unit

This setting is only available if stacked graphs are selected above. Choose a unit from the list. All channels with this unit will be stacked on top of each other. By default, you cannot exclude single channels from stacking if they use the selected unit. However, there is an advanced procedure to do so.

Inherited Settings

By default, all following settings are inherited from objects higher in the hierarchy and should be changed there, if necessary. Often, best practice is to change them centrally in the Root group's settings, see section Inheritance of Settings for more information. To change a setting only for this object, disable inheritance by clicking the button next to inherit from under the corresponding setting name. You will then see the options described below.

Scanning Interval

Click inherited_settings_button to disrupt the inheritance. See section Inheritance of Settings for more information.

Scanning Interval

Select a scanning interval (seconds, minutes, or hours) from the list. The scanning interval determines the time the sensor waits between two scans. You can change the available intervals in the system administration on PRTG on premises installations.

If a Sensor Query Fails

Define the number of scanning intervals that a sensor has time reach and check a device again in case a sensor query fails. The sensor can try to re-reach and check a device several times, depending on the option you select here, before it will be set to a Down status. This helps you avoid false alarms if the monitored device has only temporary issues. For previous scanning intervals with failed requests, the sensor will show a Warning status. Choose between:

  • Set sensor to "down" immediately: The sensor will show an error immediately after the first failed request.
  • Set sensor to "warning" for 1 interval, then set to "down" (recommended): After the first failed request, the sensor will show a yellow warning status. If the following request also fails, the sensor will show an error.
  • Set sensor to "warning" for 2 intervals, then set to "down": Show an error status only after three continuously failed requests.
  • Set sensor to "warning" for 3 intervals, then set to "down": Show an error status only after four continuously failed requests.
  • Set sensor to "warning" for 4 intervals, then set to "down": Show an error status only after five continuously failed requests.
  • Set sensor to "warning" for 5 intervals, then set to "down": Show an error status only after six continuously failed requests.

icon-i-roundSensors that monitor via Windows Management Instrumentation (WMI) always wait at least one scanning interval until they show an error. It is not possible to set a WMI sensor to "down" immediately, so the first option will not apply to these sensor types. All other options can apply.

icon-i-roundIf a sensor has defined error limits for channels, it will always show a Down status immediately, so no "wait" option will apply.
 

icon-i-roundIf a channel uses lookup values, it will always show a Down status immediately, so no "wait" options will apply.

Schedules, Dependencies, and Maintenance Window

icon-i-roundInheritance for schedules, dependencies, and maintenance windows cannot be interrupted. The corresponding settings from the parent objects will always be active. However, you can define additional settings here. They will be active at the same time as the parent objects' settings.

Schedule

Select a schedule from the list. Schedules can be used to monitor for a certain time span (days, hours) every week. With the period list option it is also possible to pause monitoring for a specific time span. You can create new schedules and edit existing ones in the account settings.

icon-i-roundSchedules are generally inherited. New schedules will be added to existing ones, so all schedules are active at the same time.

Maintenance Window

Specify if you want to set up a one-time maintenance window. During a "maintenance window" period, this object and all child objects will not be monitored. They will be in a paused state instead. Choose between:

  • Not set (monitor continuously): No maintenance window will be set and monitoring will always be active.
  • Set up a one-time maintenance window: Pause monitoring within a maintenance window. You can define a time span for a monitoring pause below and change it even for a currently running maintenance window.

icon-i-roundTo terminate a current maintenance window before the defined end date, change the time entry in Maintenance Ends field to a date in the past.

Maintenance Begins

This field is only visible if you enabled the maintenance window above. Use the date time picker to enter the start date and time of the maintenance window.

Maintenance Ends

This field is only visible if you enabled the maintenance window above. Use the date time picker to enter the end date and time of the maintenance window.

Dependency Type

Define a dependency type. Dependencies can be used to pause monitoring for an object depending on the status of another. You can choose between:

  • Use parent: Pause the current sensor if the device, where it is created on, is in Down status, or is paused by another dependency.
  • Select object: Pause the current sensor if the device, where it is created on, is in Down status, or is paused by another dependency. Additionally, pause the current sensor if a specific other object in the device tree is in Down status, or is paused by another dependency. Select below.
  • Master object for parent: Make this sensor the master object for its parent device. The sensor will influence the behavior of the device, where it is created on: If the sensor is in Down status, the device will be paused. For example, it is a good idea to make a Ping sensor the master object for its parent device to pause monitoring for all other sensors on the device in case the device cannot even be pinged. Additionally, the sensor will be paused if the parent group of its parent device is in Down status, or if it is paused by another dependency.

icon-i-roundTesting your dependencies is easy! Simply choose Simulate Error Status from the context menu of an object that other objects depend on. A few seconds later all dependent objects should be paused. You can check all dependencies in your PRTG installation by selecting Devices | Dependencies from the main menu bar.

Dependency

This field is only visible if the Select object option is enabled above. Click on the reading-glasses and use the object selector to choose an object on which the current sensor will depend.

Dependency Delay (Sec.)

Define a time span in seconds for a dependency delay. After the master object for this dependency goes back to Up status, PRTG will start monitoring the depending objects after this extra delayed. This can help to avoid false alarms, for example, after a server restart, by giving systems more time for all services to start up. Please enter an integer value.

icon-i-round-redThis setting is not available if you choose this sensor to Use parent or to be the Master object for parent. In this case, please define delays in the parent Device Settings or in the superior Group Settings.

Access Rights

Click inherited_settings_button to disrupt the inheritance. See section Inheritance of Settings for more information.

User Group Access

Define which user group(s) will have access to the object you're editing. A table with user groups and types of access rights is shown: It contains all user groups from your setup. For each user group you can choose from the following access rights:

  • Inherited: Use the access rights settings of the parent object.
  • None: Users in this group cannot see or edit the object. The object neither shows up in lists nor in the device tree. Exception: If a child object is visible to the user, the object is visible in the device tree, though not accessible.
  • Read: Users in this group can see the object and review its monitoring results.
  • Write: Users in this group can see the object, review its monitoring results, and edit the object's settings. They cannot edit access rights settings.
  • Full: Users in this group can see the object, review its monitoring results, edit the object's settings, and edit access rights settings.

You can create new user groups in the System Administration—User Groups settings. To automatically set all objects further down in the hierarchy to inherit this object's access rights, set a check mark for the Revert children's access rights to inherited option.

icon-book-arrowsFor more details on access rights, see the section User Access Rights.

More

Knowledge Base: How do PRTG sensors connect to Oracle databases?

Edit Sensor Channels

To change display settings, spike filter, and limits, switch to the sensor's Overview tab and click the gear icon of a specific channel. For detailed information, see the Sensor Channels Settings section.

Notifications

Click the Notifications tab to change notification triggers. For detailed information, see the Sensor Notifications Settings section.

Others

For more general information about settings, see the Object Settings section.

Sensor Settings Overview

For information about sensor settings, see the following sections: