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Monitoring

System Monitoring​

sql

-- Check active devices
SELECT deviceId, protocol, lastUpdate 
FROM devices 
WHERE status = 'online';
-- Monitor positions
SELECT deviceId, latitude, longitude, speed 
FROM positions 
WHERE serverTime > NOW() - INTERVAL 1 HOUR;

Performance Metrics​

bash

# Check server status
curl http://localhost:8082/api/server
# Monitor memory usage
jmap -heap PID
# Check thread status
jstack PID