jerinka / cpu_mem_logger

log proces taking more than a threshold of cpu or memory

cpu_mem_logger

Log proces taking more than a threshold of cpu or memory, every one sec.  

Install

sudo apt-get install -y libprocps-dev

Build

g++ monitor.cpp -o monitor -lprocps

Run and log

• ./monitor <log_filename> <cpu_threshold> <mem_threshold> <interval_sec>
• when cpu usage >50
• memory use >50
• every 1 second

./monitor usage_log.txt 50 50 1 &

Add as systemd service

To run the program in the background even after a restart, you can create a systemd service for it. First, compile the program and move the binary to an appropriate location (e.g., /usr/local/bin).

g++ monitor3.cpp -o monitor -lprocps
sudo mv monitor /usr/local/bin/monitor

Next, create a systemd service file for the program:

sudo touch /etc/systemd/system/monitor.service
sudo nano /etc/systemd/system/monitor.service

Paste the following content into the monitor.service file, replacing CPU_THRESHOLD and MEM_THRESHOLD with the desired values:

[Unit]
Description=Monitor high CPU and memory usage

[Service]
ExecStart=/usr/local/bin/monitor /var/log/usage_log.txt CPU_THRESHOLD MEM_THRESHOLD
Restart=always
User=nobody
Group=nobody

[Install]
WantedBy=multi-user.target

Save and exit the file. Reload the systemd configuration:

sudo systemctl daemon-reload

Enable and start the service:

sudo systemctl enable monitor
sudo systemctl start monitor

Now the program will run in the background and restart automatically upon system restart. To check the status of the service, use the following command:

sudo systemctl status monitor

To stop the service, use:

sudo systemctl stop monitor

And to disable it from starting on boot, use:

sudo systemctl disable monitor