About 2018 machine_usage ,How do you understand timestamps in tables?

[ziyuannanxing]

Hi, First of all, thank you for your contribution to academia. I want to know how the timestamp is calculated in the machine_usage table? I noticed that the timestamp intervals are not the same, so I wonder how many seconds does it collect data? Looking forward to your early reply. Thank you very much!

[catcatwang]

Do you know now? Looking forward to your reply.