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: IO
SQL Server versions: 2000, 2005, 2008, 2008 R2, 2012, 2014, 2016, 2017


1 Answer


Occurs when a task is waiting on a latch for a buffer that is not in an I/O request. The latch request is in Update mode. Information from Microsoft®

Somewhat common

This wait is somewhat common for most instances

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

Prevalence of PAGELATCH_UP across the Spotlight Population

For 72 % of hours with this wait, average wait time is less than 0.25 ms

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

3696 instances contributed data to this chart

Latency Distribution of PAGELATCH_UP across the Spotlight Population