Troubleshooting high load issues in a Linux server can be a multi-step process, often involving the analysis of system logs, performance metrics, and system processes. Here's a detailed guide:

**Step 1: Identify the Problem**

- Use the `top` command to get a quick overview of the system. This will show you CPU usage, load averages, and the most resource-intensive processes.
- The load average shows the average system load over a period of time. They appear as three numbers which represent the system load during the last one, five, and fifteen minutes.

**Step 2: Dig Deeper with More Specific Commands**

- If CPU usage is high, identify the processes that are using the most CPU:
    - Use the `ps aux --sort=-%cpu | head` command to find the top CPU-consuming processes.
- If memory usage is high, identify the processes that are using the most memory:
    - Use the `ps aux --sort=-%mem | head` command to find the top memory-consuming processes.
- If I/O is high, use the `iotop` command to see which processes are performing the most I/O operations.
- Use the `vmstat` command to get a report about processes, memory, paging, block IO, traps, and CPU activity.

**Step 3: Analyze System Logs**

- System logs can provide clues about what's going wrong. Use `tail -f /var/log/syslog` to view the system log in real time. Look for any error messages or warnings.
- Check application-specific logs in `/var/log`.

**Step 4: Examine Performance Metrics Over Time**

- Use monitoring tools like `sar`, `iostat`, `mpstat` to examine CPU, memory, and I/O usage over time.
- If you have a tool like `munin` or `nagios` installed, use it to examine historical data and identify when the problem started.

**Step 5: Resolve the Issue**

- If a specific process is causing high load, consider:
    - **Killing the process**: Use the `kill` command, but be aware this can cause data loss.
    - **Restarting the service**: For example, `sudo service apache2 restart`. This may temporarily alleviate the problem.
    - **Optimizing the process**: If the process is part of an application you control, there may be opportunities for optimization.

- If overall system resources are inadequate, consider:
    - **Adding more resources**: Upgrade your server's CPU, memory, or disk space.
    - **Load balancing**: Distribute the load across multiple servers.
    - **Optimizing your system**: Use a lighter-weight web server, optimize your database, etc.

**Step 6: Monitor and Adjust**

- After making changes, monitor your system to see if the problem has been resolved.
- It may take some time and tweaking to find a solution that works. Keep an eye on system logs and performance metrics.
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