Describe a strategy to stabilize performance for a parameterized search endpoint suffering from plan cache instability.

Problem Statement

Explanation

Segment queries so highly skewed predicates use a dedicated path. For example, branch on a flag to call a version optimized for rare values. Use parameterization with sensible defaults, and consider OPTIMIZE FOR or recompile hints cautiously when estimates are volatile. Add supporting indexes that match the common filter patterns, and ensure statistics contain histograms on skewed columns. Monitor with plan hash and track regressions when distributions shift.

Code Solution

SolutionRead Only

-- Example branching
IF @IsRare=1
  SELECT ... WHERE country='VA' OPTION (RECOMPILE);
ELSE
  SELECT ... WHERE country=@country;

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This question appears in the following practice sets:

Query Optimization & Execution Plans

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Describe a strategy to stabilize performance for a parameterized search endpoint suffering from plan cache instability.

Problem Statement

Explanation

Code Solution

Practice Sets

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Master Interviews Anywhere, Anytime

Describe a strategy to stabilize performance for a parameterized search endpoint suffering from plan cache instability.

Problem Statement

Explanation

Code Solution

Practice Sets

Related Questions

Which SQL statement retrieves all columns and rows from a table named employees?

Which clause filters rows before aggregation and affects which rows are grouped?

What is the default sort order when ORDER BY is used without ASC or DESC?

Which construct is commonly used to paginate results in SQL engines like Postgres and MySQL?

Which predicate correctly checks for missing values in standard SQL?

More from SQL & Databases

Master Interviews
Anywhere, Anytime