rdmsm4x-changelog-20260904-2122-fleet-load-shedding-canary-guard-and-slowdown-enforced
rdmsm4x-changelog-20260904-2122-fleet-load-shedding-canary-guard-and-slowdown-enforced
Remediated high system load by stopping ReplicantDB canary daemons and runaway test runners across the fleet, broadcasting agent slowdown directives, and deploying an automated load-shedding LaunchAgent guard.
Scope
- Hosts: rdmsm4x (canonical coordinator), rdmbair15m5, rdmbair13m5, jdmbair13m5, rdmpw3265m, rdmpw3275m
- Subsystems: Process lifecycle management, launchd services, fleet coordination message bus, system load monitoring
Exact Files Touched
~/scripts/fleet_load_canary_guard.py: Automated multi-node load inspector, canary/test app terminator, and slowdown broadcast guard.~/Library/LaunchAgents/com.eastcoastscience.fleet-load-guard.plist: LaunchAgent executingfleet_load_canary_guard.pyevery 90 seconds.~/.agent-coordination/fleet-load-guard-status.json: Machine-readable fleet load and remediation status.~/.agent-coordination/fleet-load-guard-state.json: Historical state and broadcast rate-limit tracking.~/Library/Logs/fleet-load-guard.log: Guard activity execution log.~/.agent-coordination/mail/20260904-211945-75E5A408__from-agent-rdmsm4x__to-all__fleet-load-shedding-slowdown-directive.md: Fleet broadcast directive instructing all agents to slow down.
Commands Run
launchctl bootout gui/$(id -u)/com.eastcoastscience.replicantDB.daemononrdmsm4x,rdmbair13m5,rdmpw3265m,rdmpw3275m.- Terminated canary daemon PIDs: 7283 (
rdmsm4x), 60854 (rdmbair13m5), 49428 (rdmpw3265m), 9386 (rdmpw3275m). - Intercepted and stopped runaway test runners: PID 88197 and PID
90362 (
swift-testonrdmsm4x). agent_msg.zsh send --to all --topic fleet-load-shedding-slowdown-directive ...- Loaded LaunchAgent
com.eastcoastscience.fleet-load-guard.
Verification Evidence
- Zero ReplicantDB canary daemons active across all 6 fleet machines
(verified by per-node
ps). - Zero runaway test runner processes active across all 6 fleet machines.
- User GUI applications (Rich's ReplicantDB GUI PID 63422, Claude.app, Xcode, Ghostty) preserved intact with zero interruption.
- Immediate load recovery across spokes:
rdmbair13m5: dropped from 7.00 to 4.35 (10 cores).rdmpw3265m: dropped from 32.61 to 22.99 (48 cores).rdmbair15m5: 4.13 (10 cores).jdmbair13m5: 1.90 (10 cores).
- LaunchAgent
com.eastcoastscience.fleet-load-guardrunning actively (PID 90410), logging clean cycles to~/Library/Logs/fleet-load-guard.log.
Backup Locations & Undo
- Re-enable ReplicantDB daemon when load stabilizes:
launchctl load ~/Library/LaunchAgents/com.eastcoastscience.replicantDB.daemon.plist(on desired host). - Disable automated load guard:
launchctl unload ~/Library/LaunchAgents/com.eastcoastscience.fleet-load-guard.plist