The Phenomenon of the CronPosted: December 7, 2005
Sorry for the dramatic title, its not really. But I have noticed an interesting pattern back in the summer. I tracked the number of cron job run every minute for an entire week. I made a quick graph which shows how many cron jobs run each minute (on average).
The results are pretty intersting. Most people who run a cron job once an hour, generally select the 0th minute (on the hour) to have the cron job run. As it turns out, a lot of people do this, and on the hour a large load on the server occurs. The same thing occrus on the 30th minute, etc.
If it doesn’t matter which minute of the hour your cron job runs on, login and choose a random minute like 37 (instead of 0). The original post can be found here.
All the best,