reader_executor_memory_pressure_critical_level_pct
Memory-pressure threshold at which the experimentalReaderExecutor enters the Critical memory-pressure level, its most aggressive read-window reduction. See reader_executor_memory_pressure_elevated_level_pct for the scopes, range and ordering rules.
reader_executor_memory_pressure_elevated_level_pct
Memory-pressure threshold, as a percent of a memory tracker’s hard limit, at which the experimentalReaderExecutor enters the Elevated memory-pressure level and starts shrinking its read window. The thresholds are applied to three scopes independently - the server total (max_server_memory_usage), the user (max_memory_usage_for_user) and the query (max_memory_usage) - and a reader takes the highest of the three, so one query near its own limit shrinks its window even while the server is idle. A scope with no hard limit contributes nothing. Must be in [1, 100] and satisfy elevated <= high <= critical; an out-of-range or out-of-order triple is rejected at startup and on SYSTEM RELOAD CONFIG. Zero is rejected because an elevated of 0 would put every scope at Elevated, including one with no hard limit.
reader_executor_memory_pressure_high_level_pct
Memory-pressure threshold at which the experimentalReaderExecutor enters the High memory-pressure level. See reader_executor_memory_pressure_elevated_level_pct for the scopes, range and ordering rules.