Waitopedia is a comprehensive resource of information about SQL Server waits.

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.

SOS_RESERVEDMEMBLOCKLIST

Category: Memory
SQL Server versions: 2005, 2008, 2008 R2, 2012

What is SOS_RESERVEDMEMBLOCKLIST?

1 Answer

 

Occurs during internal synchronization in the SQL Server memory manager. Information from Microsoft®

Very rare

This wait never occurs for most instances

For each of 4207 instances, we ranked SOS_RESERVEDMEMBLOCKLIST on how frequent it is compared to all other recent waits. The chart shows the total of all rankings.

Prevalence of SOS_RESERVEDMEMBLOCKLIST across the Spotlight Population

For 76 % of hours with this wait, average wait time is less than 0.11 ms

For each instance, we found all the recent hours when it had a SOS_RESERVEDMEMBLOCKLIST wait. We found the average latency for each of those hours.

525 instances contributed data to this chart

Latency Distribution of SOS_RESERVEDMEMBLOCKLIST across the Spotlight Population