SQLTRACE_INCREMENTAL_FLUSH_SLEEP

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Description:

This wait type is when a thread is sleeping between checks for SQL Trace information to flush out to a trace file.

(Books Online description: N/A)

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Added in SQL Server version:

2008 R2

Removed in SQL Server version:

N/A

Extended Events wait_type value:

The map_key value in sys.dm_xe_map_values is 162 in 2008 R2, and 166 in 2012 and 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.

Other information:

I have not seen this wait type be a noticeable contention point.

This wait type is one that I usually filter out as a benign wait when doing wait statistics analysis.

Known occurrences in SQL Server (list number matches call stack list):

  1. Sleeping between checks for SQL Trace information to flush

Abbreviated call stacks (list number matches known occurrences list):

  1. SOS_Task::PostWait+9e
    EventInternal<SuspendQueueSLock>::Wait+25e
    CTraceManagementTask::Invoke+ee
    CTraceBatchTask::Task+25c
    SOS_Task::Param::Execute+21e
    SOS_Scheduler::RunTask+ab