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In case the database records retention period is specified shorter than before while configuring the LPR channel, the database will gradually clean itself.

If the Debug 4 debugging mode is enabled, then when the SQL database queue reaches 1000 or more queries, the events will be generated in the Event Log every 10 seconds indicating the current queue until the queue is less than 1000 (for details, see Enabling the Debug window).

To configure the database records retention period, do the following:

  1. In the System Settings dialog window, open the Hardware tab (1).
  2. In the object tree, select the LPR channel object corresponding to the active software module (see Go to the LPR channel object settings panel (2), corresponding to the activated module (see Activating the program module, used for identifying the plates, 2section). The configuration panel of the selected object will be displayed on the right side of the Hardware tab.
  3. Go to the Saving settings tab (3).
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  4. In the Archive size, days field, specify the number of days that records are stored in the database records retention period in days (4).
  5. Click Apply (5).

The database records retention period is configured.

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