December 2017
Intermediate to advanced
434 pages
10h 14m
English
Content preview from SQL Server 2017 Administrator's Guide
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PAGELATCH
This wait type is quite frequently misplaced with PAGEIOLATCH but PAGELATCH is used for pages already present in the memory. The thread waits for the access to such a page again with possible PAGELATCH_SH and PAGELATCH_EX wait types.
A pretty common situation with this wait type is a tempDB contention, where you need to analyze what page is being waited for and what type of query is actually waiting for such a resource. As a solution to the tempDB, contention you can do the following:
- Add more tempDB data files
- Use traceflags 1118 and 1117 for tempDB on systems older than SQL Server 2016
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