Plaintext warning tmm[]: 011e0002:4: sweeper_segment_cb_any: Aggressive mode /Common/default- eviction-policy activated (0) (global memory)…

The log messages indicate the BIG-IP system's Traffic Management Microkernel (TMM) has exceeded its high-water memory threshold, triggering the "Aggressive mode" of the connection sweeper. This is a protective mechanism to reclaim memory under heavy load. The second log line, "1 Connections killed," explicitly confirms that the system has started terminating (reaping) existing connections to free up memory resources. This action is a direct result of the TMM memory exhaustion.

B. The log explicitly states "1 Connections killed," not that all connections are dropped. The sweeper selectively reaps connections, typically starting with the oldest and idlest ones.

D. The log message specifies "(global memory)," which refers to TMM memory, not the host's swap memory. While related, they are distinct memory pools with different triggers.

- F5 Networks. (2021). BIG-IP TMM and system memory limits. AskF5 article K15740. "When TMM memory usage exceeds the high-water mark (85 percent by default), the system invokes the aggressive sweeper to reap connections."

- F5 Networks. (2021). The BIG-IP system may log the 'Aggressive mode sweeper' message. AskF5 article K15475. "This message indicates that the BIG-IP system is experiencing high TMM memory utilization... the system begins to terminate connections to reclaim memory."

- F5 Networks. (2017). BIG-IP LTM Concepts. Chapter: Memory Management. "The aggressive sweeper is activated when memory utilization reaches the high-water mark... it begins to drop connections."