How do I troubleshoot Linux server performance issues?

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How do you troubleshoot server performance issues?

Troubleshoot server performance problems

  1. Check the server type and ensure that it has the necessary CPU and RAM resources to meet your application requirements and user load.
  2. Check if your application is using a cache. …
  3. Check if there are any cron jobs running on the server and consuming resources.

How do I check the health of a Linux server?

How to Check the Health of a Unix/Linux Server

  1. Step 1: Check for Swapping or Paging. …
  2. Step 2: Check for Run Queue Greater than 1. …
  3. Step 3: Check for Long Running Tasks with High CPU Usage. …
  4. Step 4: Check for Excessive Physical Disk Input and Output. …
  5. Step 5: Check for Excessive Spawning of Short Lived Processes.

How do I fix a slow running Linux server problem?

Reference this diagram as you go through the steps below:

  1. Step 1: Check I/O wait and CPU Idletime. …
  2. Step 2: IO Wait is low and idle time is low: check CPU user time. …
  3. Step 3: IO wait is low and idle time is high. …
  4. Step 4: IO Wait is high: check your swap usage. …
  5. Step 5: swap usage is high. …
  6. Step 6: swap usage is low.
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How do I troubleshoot an issue in Linux?

How to troubleshoot network connectivity with Linux server

  1. Check your network configuration. …
  2. Check the network configuration file. …
  3. Check the servers DNS records. …
  4. Test the connection both ways. …
  5. Find out where the connection fails. …
  6. Firewall settings. …
  7. Host status information.

What are the six steps in the troubleshooting process?

The six steps of troubleshooting.

  1. Identify the problem. …
  2. Establish a theory of probable cause. …
  3. Test probable cause theory to determine actual cause. …
  4. Establish an action plan and execute the plan. …
  5. Verify full system functionality. …
  6. Document the process.

How can I monitor my system performance?

Use the Windows key + R keyboard shortcut to open the Run command, type perfmon, and click OK to open. Use the Windows key + X keyboard shortcut to open the Power User menu, select Computer Management, and click on Performance.

How do I tune a Linux performance?

To tune for maximum performance on Linux, you need to make adjustments to the following: File Descriptors. Virtual Memory. Network Interface.
…
To tune disk I/O performance for non SCSI disks

  1. Test the disk speed. Use this command: …
  2. Enable direct memory access (DMA). …
  3. Check the speed again using the hdparm command.

What should I monitor Linux server?

Performance Metrics for Linux Server Monitoring

  1. Summary. Load average. CPU utilization. Memory utilization. Memory break up. Disk usage with capacity plan. Recent events. Top process by CPU and memory. Application details. Down/trouble history.
  2. Processes.
  3. CPU.
  4. Memory.
  5. Disks.
  6. Network.
  7. Plugins.
  8. Checks.

Why is Linux so laggy?

Your Linux computer could be running slow for any one of the following reasons: Unnecessary services started at boot time by systemd (or whatever init system you’re using) High resource usage from multiple heavy-use applications being open. Some kind of hardware malfunction or misconfiguration.

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How do I troubleshoot CPU usage in Linux?

The old good top command to find out Linux CPU Utilization

  1. Top command to find out Linux cpu usage. …
  2. Say hello to htop. …
  3. Display the utilization of each CPU individually using mpstat. …
  4. Report CPU utilization using the sar command. …
  5. Task: Find out who is monopolizing or eating the CPUs. …
  6. iostat command. …
  7. vmstat command.

How do you troubleshoot a network connection?

Network troubleshooting is a repeatable process, which means that you can break it down into clear steps that anyone can follow.

  1. Identify the Problem. …
  2. Develop a Theory. …
  3. Test the Theory. …
  4. Plan of Action. …
  5. Implement the Solution. …
  6. Verify System Functionality. …
  7. Document the Issue.

How do you investigate network issues?

I always start troubleshooting using these simple network troubleshooting steps to help diagnose and refine the issue.

  1. Check the hardware. …
  2. Use ipconfig. …
  3. Use ping and tracert. …
  4. Perform a DNS check. …
  5. Contact the ISP. …
  6. Check on virus and malware protection. …
  7. Review database logs.