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.


Category: Other
SQL Server versions: 2008, 2008 R2, 2012, 2014, 2016, 2017

What is IO_RETRY?

1 Answer


Occurs when an I/O operation such as a read or a write to disk fails because of insufficient resources, and is then retried. Information from Microsoft®

Very rare

This wait never occurs for most instances

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

Prevalence of IO_RETRY across the Spotlight Population

For 92 % of hours with this wait, average wait time is around 11 ms

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

7 instances contributed data to this chart

Latency Distribution of IO_RETRY across the Spotlight Population