问题
Every time I execute a query in Google bigquery in the Explanation tab, I can see that their involves an average waiting time. Is it possible to know the percentage or seconds of wait time?
回答1:
Since BigQuery is a managed service, around the glob a lot of customers are using it. It has an internal scheduling system based on the billingTier (explained here https://cloud.google.com/bigquery/pricing#high-compute) and other internals of your project. Based on this the query is scheduled to be executed based on the cluster availability. So there will be a minimum time until it finds a cluster of machines to execute your job.
I never seen there significant times. In case you have this issue then contact google support to see your project. If you edit your original question and add a job ID, a google enginner may check it out if there is an issue orn ot.
回答2:
It's currently not exposed in the UI. But you can find a similar concept from API (search "wait" from following page): https://cloud.google.com/bigquery/docs/reference/v2/jobs#resource
回答3:
Is it possible to reduce the big query execution wait time to the minimum?
Purchase more BigQuery Slots.
Contact your sales representative or support for more information.
来源：https://stackoverflow.com/questions/39450162/what-will-be-the-wait-time-before-big-query-executes-a-query