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.
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Occurs during synchronization of replication schema version information. This state exists when DDL statements are executed on the replicated object, and when the log reader builds or consumes versioned schema based on DDL occurrence. This wait type is also used by log reader agent to synchronize memory access. If a publisher has large number of very active published databases and log reader agents, contention can be seen on this wait type. Information from Microsoft®
answered 3107 days ago
Spotlight Essentials
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This wait never occurs for most instances
For each of 4207 instances, we ranked REPL_SCHEMA_ACCESS on how frequent it is compared to all other recent waits. The chart shows the total of all rankings.
For 67 % of hours with this wait, average wait time is less than 0.019 ms
For each instance, we found all the recent hours when it had a REPL_SCHEMA_ACCESS wait. We found the average latency for each of those hours.
122 instances contributed data to this chart