Linux servers can silently degrade over extended uptime without obvious crashes or alerts. Running apt upgrade keeps packages current but doesn't reload updated libraries in memory, restart daemons, or resolve orphaned sockets and broken systemd dependency chains. After 30–90 days, long-running workloads like blockchain nodes, indexers, and RPC endpoints can encounter partial failures where SSH and monitoring appear healthy while critical processes have already stopped. Real production stability requires explicit service restart policies, observability layers that detect performance drift, and infrastructure designed to anticipate degradation rather than assume uptime equals health.
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