Ambassadors group | XCP-ng and XO forum

tjkreidl

@MasterOSkillio Typically, C-states need to be changed in the BIOS. In some cases, it can be very helpful. I wrote a few blogs including this topic entitled "A Tale of Two Servers" but cannot readily find them on-line at the moment. Alas, Citrix has purged a lot of still relevant older content over the years.

tjkreidl

@RS One option would be this, assuming in this se you want to run the job at midnight on Dec. 25:
/bin/echo "/path/to/your/script.sh" | at midnight Dec 25

While cron doesn't offer a specific one-time execution, you could also do this in cron but would have to remove the entry afterwards:
0 0 25 12 * /path/to/your/script.sh

Also, take a look at this option: https://www.fastcron.com/guides/one-time-cronjobs/

tjkreidl

@DKirk That all makes sense, thanks for clarifying. Looks like there are further comments below that seem to pinpoint where the issue may lay. The key point you make is only "after the last updates" is when this started happening!

tjkreidl

@DKirk Very odd. Maybe a electrical power issue? Do you see this if you run xentop on each host and really important, do they happen at the same time on all your servers?
Any chance they are overheating and pausing briefly?

tjkreidl

@olivierlambert Agreed. The Citrix forum used to be very active, but especially since Citrix was taken over, https://community.citrix.com has had way less activity, sadly.
It's still gratifying that a lot of the functionality still is common to both platforms, although as XCP-ng evolves, there will be continually less commonality.

tjkreidl

@Chrome Cheers -- always glad to help out. I put in many thousands of posts on the old Citrix XenServer site, and am happy to share whatever knowledge I still have, as long as it's still relevant! In a few years, it probably won't be, so carpe diem!

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