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This wait type is when a thread switches to preemptive mode as part of communicating with an OLE DB provider.
(Books Online description: N/A)
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Added in SQL Server version:
Removed in SQL Server version:
Extended Events wait_type value:
The map_key value in sys.dm_xe_map_values is 473 in 2008 and 2008 R2, 521 in 2012, and 537 in 2014 RTM. After 2014 RTM, you must check the DMV to get the latest value as some map_key values have changed in later builds.
I have not seen this wait type be a noticeable contention point.
Known occurrences in SQL Server (list number matches call stack list):
- Waiting for OLE DB information (in this case, while parsing/algebrizing a BULK INSERT statement during compilation)
- Waiting for OLE DB information (in this case, while parsing/algebrizing a query during compilation)
And other similar call stacks.
Abbreviated call stacks (list number matches known occurrences list):