memory_manager_high_watermark_mb (integer)

• Default value (as of this release): 120 GB
• Cloud default: Set to 95% of available system memory during installation.

Sets the global planner memory threshold that triggers query cancellation.

When total memory usage across all frontend sessions exceeds this value, the Frontend Memory Manager cancels one or more large queries to restore available memory.

Memory reclamation continues until usage falls below memory_manager_low_watermark_mb.

Set to 0 to disable cancellation entirely.