memory_manager_throttle_threshold_mb (integer)

• Default value (as of this release): 90 GB
• Cloud default: Set to 85% of available system memory during installation.

Specifies the memory threshold at which new queries are temporarily throttled.

When total planner memory exceeds this limit, the Frontend Memory Manager pauses new query execution until memory pressure clears.

Waiting sessions appear in pg_stat_activity with state = 'memory throttle'.

Set to 0 to disable throttling.