Matt Bruce
b934c9fdb3
- Analyzed system limits, memory usage, process status - Identified primary suspect: Next.js dev server memory leaks - Secondary suspects: macOS power mgmt, SSH timeout, OOM killer - Created monitoring script for CPU/memory/file descriptors - Documented recommendations: production builds, PM2, nohup
81 lines
2.3 KiB
Bash
Executable File
81 lines
2.3 KiB
Bash
Executable File
#!/bin/zsh
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# Process monitoring script to track what kills Next.js dev servers
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# Run this in background to capture system events
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LOG_FILE="/Users/mattbruce/.openclaw/workspace/logs/process-monitor.log"
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PID_FILE="/tmp/process-monitor.pid"
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# Create log directory
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mkdir -p "$(dirname $LOG_FILE)"
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# Function to log with timestamp
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log() {
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echo "[$(date '+%Y-%m-%d %H:%M:%S')] $1" | tee -a $LOG_FILE
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}
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# Track Node processes
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monitor_processes() {
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while true; do
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# Check if our monitored processes are running
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for port in 3000 3003 3005; do
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PID=$(lsof -ti:$port 2>/dev/null)
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if [ -n "$PID" ]; then
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# Get process info
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CPU=$(ps -p $PID -o %cpu= 2>/dev/null | tr -d ' ')
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MEM=$(ps -p $PID -o %mem= 2>/dev/null | tr -d ' ')
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RSS=$(ps -p $PID -o rss= 2>/dev/null | tr -d ' ')
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# Log if memory is high (>500MB RSS)
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if [ -n "$RSS" ] && [ "$RSS" -gt 512000 ]; then
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log "WARNING: Port $port (PID:$PID) using ${RSS}KB RAM (${MEM}% of system)"
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fi
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# Log if CPU is high (>80%)
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if [ -n "$CPU" ] && [ "${CPU%.*}" -gt 80 ]; then
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log "WARNING: Port $port (PID:$PID) using ${CPU}% CPU"
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fi
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fi
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done
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# Check system memory
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FREE_MEM=$(vm_stat | grep "Pages free" | awk '{print $3}' | tr -d '.')
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if [ -n "$FREE_MEM" ]; then
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FREE_MB=$((FREE_MEM * 4096 / 1024 / 1024))
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if [ "$FREE_MB" -lt 500 ]; then
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log "WARNING: Low system memory: ${FREE_MB}MB free"
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fi
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fi
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# Check file descriptors
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for port in 3000 3003 3005; do
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PID=$(lsof -ti:$port 2>/dev/null)
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if [ -n "$PID" ]; then
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FD_COUNT=$(lsof -p $PID 2>/dev/null | wc -l)
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if [ "$FD_COUNT" -gt 900 ]; then
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log "WARNING: Port $port (PID:$PID) has $FD_COUNT open file descriptors"
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fi
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fi
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done
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sleep 60
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done
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}
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# Check if already running
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if [ -f "$PID_FILE" ] && kill -0 $(cat $PID_FILE) 2>/dev/null; then
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echo "Monitor already running (PID: $(cat $PID_FILE))"
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exit 0
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fi
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# Save PID
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echo $$ > $PID_FILE
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log "=== Process Monitor Started ==="
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log "Monitoring ports: 3000, 3003, 3005"
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log "Checking: CPU, Memory, File Descriptors, System Resources"
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log "Log file: $LOG_FILE"
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# Start monitoring
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monitor_processes &
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