We experienced performance issues in Moodle due to excessive database activity caused by a user's Google Calendar import. The logs indicate that during each import, Moodle creates a large number of calendar event records within a very short period, leading to high memory usage and "too many database connections" errors.

Steps to Reproduce:

1. Set up a Google Calendar import in Moodle.
2. Schedule it to sync hourly.
3. Monitor the database activity during import.
4. Observe if multiple event records are created excessively.

Expected Behavior:
Moodle should efficiently sync events without overloading the database.

Actual Behavior:
The import process creates a high number of event records rapidly, consuming system resources and leading to performance degradation.

Temporary Workaround:
We have reduced the calendar sync frequency to once per day for the affected user.