Number of auto-parameterization attempts per second. The total should be the sum of the failed, safe, and unsafe auto-parameterizations. Auto-parameterization occurs when an instance of SQL Server tries to parameterize a Transact-SQL request by replacing some literals with parameters to me reuse of the resulting cached execution plan across multiple similar-looking requests possible. Note that auto-parameterizations are also known as simple parameterizations in the newer versions of SQL Server. This counter does not include forced parameterizations.