Tuning Aurora MySQL with thread states - Amazon Aurora
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Tuning Aurora MySQL with thread states

The following table summarizes the most common general thread states for Aurora MySQL.

General thread state Description

creating sort index

This thread state indicates that a thread is processing a SELECT statement that requires the use of an internal temporary table to sort the data.

sending data

This thread state indicates that a thread is reading and filtering rows for a query to determine the correct result set.