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PAGEIOLATCH_NL

Short Description

Identified for informational purposes only. Not supported. Future compatibility is not guaranteed.

Detailed Description​

Latches are lightweight, fast methods of managing concurrency on a specific resource.

The PAGEIOLATCH_* group of latches are seen in management of data pages.

PAGEIOLATCH_NL is for Microsoft internal use and there is little evidence of it being seen much in the real world.

How to reduce this wait​

Whilst long waits on the PAGEIOLATCH_XX series may indicate problems with the disk subsystem, it is important to check against a performance baseline to check:

  • Check for large increase in the volume of I/O
  • Check for large increases in database time
  • Check for large increases in the volume of queries
  • Check for changes in execution plans

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