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The description shown below is the top answer as voted by the Spotlight community.

The charts are based on 2.1 TB of data collected from 4207 instances uploaded by 323 Spotlight users over an 8 week period.

PREEMPTIVE_XE_CX_HTTP_CALL

Category: Other
SQL Server versions: 2014, 2016, 2017

What is PREEMPTIVE_XE_CX_HTTP_CALL?

Never

This wait has never occurred recently

PREEMPTIVE_XE_CX_HTTP_CALL has not occurred recently on 4207 instances checked.

Prevalence of PREEMPTIVE_XE_CX_HTTP_CALL across the Spotlight Population