# ​The specific run of synthetic is done fixed timing like Cron?

**URL:** <https://community.dynatrace.com/t/the-specific-run-of-synthetic-is-done-fixed-timing-like-cron/14426>\
**Category:** Synthetic Monitoring\
**Tags:** synthetic-monitoring\
**Created:** [August 3, 2018, 3:58am UTC](https://community.dynatrace.com/t/the-specific-run-of-synthetic-is-done-fixed-timing-like-cron/14426 "2018-08-03T03:58:34Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![nkobayashi1](https://dub1.discourse-cdn.com/dynatrace/user_avatar/community.dynatrace.com/nkobayashi1/32/5187_2.png) [@nkobayashi1](https://community.dynatrace.com/u/nkobayashi1)\
**Post date:** [August 3, 2018, 3:58am UTC](https://community.dynatrace.com/t/the-specific-run-of-synthetic-is-done-fixed-timing-like-cron/14426/1 "2018-08-03T03:58:34Z")

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Hi,

In the case of Synthetic of Dynatrace, it seems that the each runs is done at a fixed time.  
ex: 11:11, 11:26, 11:41, 11:56, 12:11 …  
Is it expected behavior? If so, why?

In the case of Synthetic Classic, the each of the runs is not done at a fixed time.  
For example, if the 1st run is at 10:00 and the interval is 15 min, the 2nd run becomes usually at about 10:16or17. Because of the 2nd run is scheduled when the 1st run is complete.

I think the old behavior is important to cover all time range of one hour.

Thanks,

Noah

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**Author:** ![Philipp\_Kastner](https://dub1.discourse-cdn.com/dynatrace/user_avatar/community.dynatrace.com/philipp_kastner/32/28797_2.png) [@Philipp\_Kastner](https://community.dynatrace.com/u/Philipp_Kastner)\
**Post date:** [August 10, 2018, 8:16am UTC](https://community.dynatrace.com/t/the-specific-run-of-synthetic-is-done-fixed-timing-like-cron/14426/2 "2018-08-10T08:16:18Z")

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Hi [@Noah K.](https://answers.dynatrace.com/users/6039/view.html),

yes, we do schedule Synthetic monitors with a fixed interval (the one you configured)  
So if you choose a 15min as a frequency & 1 location, a monitor run will be started every 15min.

For example if the first run is at 10:00 it will also run at 10:15, 10:30, 10:45, 11:00 etc.  
If the first run is at 10:08 it will also run at 10:23, 10:38, 10:53, 11:08 etc.

Why do you think this might be a problem?

Kind regards, Philipp