What methods can be used to reduce resource usage percentage in Linux systems?

To reduce resource usage in Linux, the following methods can be applied:

• Optimizing running processes: disabling or removing unnecessary services and daemons.
• Using monitoring tools: top, htop, vmstat, iotop to identify processes with high CPU, memory, or disk usage.
• Configuring the task scheduler: reducing the frequency of heavy tasks or scheduling them during low load periods.
• Resource limiting: using cgroups or ulimit to restrict CPU, memory, and disk usage for individual processes.
• Code and configuration optimization: for example, reducing thread count, caching, optimizing queries.
• Cleaning unnecessary files and logs: freeing disk space reduces load on the filesystem.

Example of limiting memory for a process using ulimit:

ulimit -v 500000  # limit virtual memory to 500000 KB
./your_application