Unexpected frequency.
THE SYMPTOM
Resource usage higher than expected Duplicate records or emails Output filling the disk
COMMON CAUSES
A schedule entered wrongly, so it runs every minute rather than every hour The same job added twice Both a cron job and an application's own scheduler running
THAT LAST ONE
For WordPress, if you added a cron job but did not disable the HTTP method, both may fire.
Disable the HTTP method.
THE DUPLICATE JOB PROBLEM
Common after migration or after someone else set one up.
Check the full list of jobs.
THE OVERLAPPING RUN PROBLEM
A job taking longer than its interval starts again before the previous finished.
That can corrupt data or exhaust resources.
Either lengthen the interval or add a lock so only one runs at a time.
WHAT TO CHECK
Whether the job's duration fits comfortably within its interval.
