High Memory ,CPU Usages by c4.large Amazon Linux

Question

We have observed that the process on our c4.large instance is consuming a significant amount of memory. Specifically:
    Total Memory Used: Approximately 2.5 GB out of 3.6 GB.
    CPU Usage: CPU usage 50%
We are experiencing high CPU and memory usage on your Amazon Linux c4.large instance but cannot identify the culprit using top or htop
We aslo verify no services or cron running behind and instance shows zero CPU and memory usage right after a reboot but then gradually starts consuming resources again

Sandeep · Accepted Answer

Hi

* Use top or htop to identify processes consuming the most resources.
* Check system logs for error messages.
* Monitor network and disk I/O.

This command will list all running processes, including their user, PID (process ID), CPU usage, memory usage, and command.

Filtering:

To focus on CPU-intensive processes:

ps aux | sort -k3 -r | head

By following these steps, you should be able to effectively troubleshoot and resolve high CPU and memory usage on your instance.

Riku_Kobayashi · Answer

Hello.

Is it possible to run the "ps" command below to identify the process with high CPU usage?  
Also, what kind of applications are you running on EC2?  
```
ps aux
```

Adeleke Adebowale J · Answer

Check for Memory Leaks  and Diagnose Memory Leaks in Applications: If you have custom or third-party applications running on the instance, they might be leaking memory. Use tools like valgrind, memcheck, or heaptrack to track memory allocations and identify leaks in your application .

Also Check for Zombie Processes: Zombie processes don't usually consume a lot of memory, but they can accumulate if parent processes don’t properly handle child processes. Use

```
 ps aux | grep 'Z' to check for zombies.
```

High Memory ,CPU Usages by c4.large Amazon Linux

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