The predefined Hash Loops alarm becomes active when a single partition of a hash join is larger than the available sort heap. This could indicate that you have a poorly performing hash join.
This alarm has been predefined with a Low severity level. The underlying metric for this alarm can be adjusted to suit your environment by using the Metric Editor.
Try increasing the SHEAPTHRES for the instance or the SORTHEAP for the database or partition to alleviate this issue.
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