mlock_executable
Perform<mlockall> after startup to lower first queries latency and to prevent clickhouse executable from being paged out under high IO load.
Enabling this option is recommended but will lead to increased startup time for up to a few seconds. Keep in mind that this setting would not work without “CAP_IPC_LOCK” capability.
mlock_executable_min_total_memory_amount_bytes
The minimum memory threshold for performing<mlockall>