If you start the Data Explorer from the WP Data Access menu, you’ll see the list of tables in your WordPress database. The column #Rows shows the number of rows in the corresponding table. This number is a rough estimate of the number of rows (records) for InnoDB tables with an estimate row count over the “Max InnoDB row count” plugin parameter.
A warning sign will be shown for values concerning this issue. The “Max InnoDB row count” plugin parameter can be defined in the Plugin Back-end Settings. The default value is 100.000. Setting this value too high might slow down your system. Please check the source below for more technical information.