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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.
DIRTY_PAGE_SYNC
What is DIRTY_PAGE_SYNC?
This wait never occurs for most instances
For each of 4207 instances, we ranked DIRTY_PAGE_SYNC on how frequent it is compared to all other recent waits. The chart shows the total of all rankings.
Prevalence of DIRTY_PAGE_SYNC across the Spotlight Population
For 89 % of hours with this wait, average wait time is less than 0.53 ms
For each instance, we found all the recent hours when it had a DIRTY_PAGE_SYNC wait. We found the average latency for each of those hours.
20 instances contributed data to this chart