Help:$smwgDefaultNumRecurringEvents

is a configuration parameter that sets the default number of instances defined by parser function, if no end date is set. The configuration parameter was introduced in.

Default setting
This means that 100 recurring events will be created if no end date is set.

Changing the default setting
To modify the setting to this configuration parameter, add one of the following lines to your "LocalSettings.php" file after the  call:

This means that 250 recurring events will be created if no end date is set.
 * Increase the number of recurring events that will be created

This means that 50 recurring events will be created if no end date is set.
 * Reduce the number of recurring events that will be created