Come explore AI technology at booth 471 during SC23 in Denver, from November 12th to 17th — Experience it before you invest!

The Ultimate One-Stop Guide to Server Monitoring

Last updated on
October 13, 2023
Wave background
Server Monitoring

Table of Content


Server monitoring is the linchpin of a robust and responsive IT infrastructure, offering insights into performance, availability, security, and more. In an era where downtime can lead to significant losses and diminished user experience, having a comprehensive understanding of server monitoring is crucial.

Whether you're an IT professional seeking to sharpen your skills or a business leader aiming to ensure optimal performance, this guide provides a step-by-step pathway to mastering the art and science of server monitoring, positioning you to take control of your technological landscape with confidence and precision.

What is Server Monitoring?

Server monitoring is the practice of continuously tracking various metrics and performance indicators of servers to ensure their optimal operation, security, and performance. It involves collecting data related to server health, such as CPU usage, memory consumption, disk space, and network activity. By closely monitoring these indicators, IT professionals can proactively identify any issues that could lead to server downtime, data loss, or compromised security and take appropriate actions to mitigate them. Server monitoring is essential for businesses of all sizes to ensure uninterrupted service availability and optimal user experience.

Why Server Monitoring Matters?

Server monitoring is vital for businesses and organizations of all sizes. By continually keeping an eye on server performance and security, administrators can proactively identify and resolve issues before they escalate into significant problems. This leads to increased uptime, improved performance, enhanced security, and a better experience for users or customers.

The tools and methodologies used in server monitoring can vary widely based on the organization's specific needs, the type of servers being monitored (e.g., web servers, database servers, application servers), and the technologies being used.

What is open-source monitoring?

Open-source monitoring refers to the practice of using software with source code that is publicly available for monitoring systems, networks, applications, or servers. Unlike proprietary software, open-source monitoring tools allow users to access, modify, and distribute the underlying code, offering more flexibility and transparency.

Open-source monitoring is vital to many IT environments, especially for organizations that prioritize flexibility, cost-effectiveness, and community collaboration. However, implementing and managing an open-source tool may require more technical expertise than some proprietary alternatives, so considerations must be made for staffing and skill levels.

Examples of Open-Source Monitoring Tools

Here are five top open-source monitoring tools you might consider, other than Nagios, Zabbix, Prometheus, SolarWinds, and Datadog:

Grafana: Although often used in conjunction with Prometheus, Grafana is a powerful open-source platform for monitoring and observability, and it supports various backends, including InfluxDB, Elasticsearch, and many others. Grafana is highly customizable, allowing you to create intricate dashboards from multiple sources.

InfluxDB: Primarily known as a high-performance, distributed, and scalable time-series database, InfluxDB also provides monitoring capabilities. It can work well in a monitoring stack and integrate with Grafana for visualizations.

Icinga 2: A fork of Nagios, Icinga 2 has expanded upon its predecessor’s capabilities. It's a flexible and extensible monitoring tool that checks the availability of your network resources, notifies users of outages, and generates performance data for reporting.

CollectD: A daemon that collects system and application performance metrics periodically and provides mechanisms to store the values in various ways. It's often used in combination with other tools like Grafana for a complete monitoring solution.

Cacti: Known for its rich graphing capabilities, Cacti provides a fast poller, advanced graph templating, and multiple data acquisition methods. It is primarily used for graphing time-series data of metrics such as network bandwidth usage, CPU load, running processes, etc.

What are common monitoring systems?

Server monitoring software is crucial for maintaining servers' health, performance, and security. Some popular server monitoring tools are available:


An industry leader, Nagios offers a range of monitoring solutions for servers, networks, and applications. It's extensible through plugins and provides an in-depth look at your infrastructure's health and performance.


This open-source software offers comprehensive features for monitoring various aspects of networks, servers, and applications. It has a highly customizable interface and can predict trends in your server's health.


Particularly popular in cloud-native environments, Prometheus is an open-source monitoring system with a strong focus on reliability and scalability. It offers multi-dimensional data collection and is widely used for monitoring Kubernetes clusters.

SolarWinds Server & Application Monitor (SAM)

This is a more commercial solution aimed at enterprises that offers very detailed metrics and monitoring capabilities. It has built-in support for a wide variety of server types, applications, and databases.


Known for its cloud-scale monitoring, Datadog is often used in environments that leverage cloud services along with traditional servers. It offers real-time dashboards and high-granularity alerting and has integrations with almost every service imaginable.

Key Metrics to Monitor

When it comes to server monitoring, several key metrics need your attention to ensure your server is performing at its best. These include:

CPU Usage

High CPU usage for an extended period could mean that the server is overworked, which could lead to slower performance or even system crashes.

Memory Utilization

Keep an eye on RAM usage to make sure your applications have enough memory to function correctly. If you consistently use a high percentage of your RAM, it might be time for an upgrade.

Disk Space

Running out of disk space can lead to various issues, including an inability to save new files and possible data corruption.

Network Activity

Monitoring the inbound and outbound traffic can help you identify any potential bottlenecks or suspicious activity that could indicate a security threat.


A critical metric that indicates the reliability of your server; more uptime is generally better.

Load Average

Indicates the number of computational tasks the server handles at any given time, helping you gauge overall server performance.

Error Rates

This includes application or system errors that can indicate bugs, system failures, or other issues that may need immediate attention.

Response Times

How quickly your server responds to a request is critical for user experience.

Database Metrics

For servers running databases, metrics like query performance, cache hit ratios, and active connections are crucial.

Application-Specific Metrics

Depending on what your server is being used for, there might be additional metrics specific to the applications you're running.

What types of servers can be monitored?

In the realm of server monitoring, there's a wide array of server types you may need to focus on, each with its own set of key performance indicators. For web servers like Apache, Nginx, or IIS, you'll want to pay attention to metrics such as request handling, response time, and traffic load. Database servers, like MySQL, PostgreSQL, Oracle, or Microsoft SQL Server, require you to track queries, connections, and resource utilization. For application servers such as Tomcat, WebSphere, and JBoss, monitoring needs to include performance metrics like application response times and transaction rates.

File servers, including Windows File Server and Samba, necessitate tracking file access, user activity, and storage capacity. Email systems like Microsoft Exchange, Postfix, and Sendmail have unique monitoring requirements, including checking email flow, queue length, and spam filtering effectiveness. For DNS servers like BIND and Microsoft DNS Server, resolution times, request rates, and cache effectiveness are pivotal.

Virtual server environments using platforms like VMware and Hyper-V require you to keep tabs on virtual machine performance, resource allocation, and migrations. Cloud server instances, such as those in AWS EC2, Azure Virtual Machines, and Google Compute Engine, present a need for monitoring provisioning, scaling costs, and performance.

Proxy servers, like Squid and HAProxy, ask for your attention on client connections, cache utilization, and request routing metrics. FTP servers, such as vsftpd and FileZilla Server, demand file transfer rates, user connections, and security settings monitoring. Print servers like Windows Print Server and CUPS require oversight of printer status, queue management, and error handling.

Best Practices for Server Monitoring

Server monitoring is more than just keeping an eye on server performance; it's about ensuring that your servers — and by extension, your business operations — run smoothly and efficiently. Adopting best practices in server monitoring is crucial to catching potential issues early, optimizing server performance, and ensuring the security and reliability of your IT infrastructure. Here are some of the pivotal best practices to consider:

Comprehensive Coverage

It's essential to monitor all aspects of your server, including CPU, memory, disk space, bandwidth, and application performance. Overlooking one can result in missed issues.

Real-time Monitoring

For immediate problem detection and resolution, real-time monitoring is a must. This ensures that issues can be addressed as soon as they arise, minimizing downtime.

Set Clear Thresholds

Determine what constitutes normal performance for your server and set thresholds for alerts. When performance deviates from these norms, you should be alerted immediately.

Regularly Review and Update

As your IT environment evolves, so should your monitoring practices. Regularly review and update your monitoring tools and strategies to align with changes in your infrastructure.

Automate Where Possible

Automation can save time and reduce human error. Use automation for tasks like patch management, backup verifications, and even some troubleshooting procedures.

Ensure Security Monitoring

Beyond performance, security is a significant concern. Monitor for signs of breaches, unauthorized access, and other suspicious activities to catch and mitigate threats early.

Maintain Historical Data

Keeping historical data can help you identify patterns, forecast future needs, and diagnose chronic issues.

Regular Testing

Just as you'd test disaster recovery plans, it's crucial to test your monitoring system. Ensure that it's accurately detecting issues and that alerts are reaching the appropriate parties.

Prioritize Alerts

Not all alerts are of the same importance. Ensure that critical alerts are easily distinguishable from minor ones to prioritize responses.

Continuous Training

As with all IT disciplines, the landscape of server monitoring is continually evolving. Ensure that your team is up to date with the latest tools, techniques, and best practices through continuous training.

By adhering to these best practices, organizations can ensure that their server monitoring efforts are effective, proactive, and aligned with their operational needs and objectives.

How does server monitoring work?

Server monitoring works by continuously scanning various metrics and operational aspects of a server to ensure that it is functioning correctly, securely, and efficiently. This includes tracking CPU usage, memory allocation, disk space, network activity, and much more. Monitoring software can alert IT administrators to any irregularities or malfunctions that could indicate a performance or security issue, thereby allowing for quick action to resolve the problem.

When you partner with Dataknox Solutions, you're getting more than just a basic monitoring service; you're investing in a comprehensive approach to server health. We integrate cutting-edge monitoring tools tailored to your specific server environment, whether on-premises, cloud-based, or a hybrid solution. Our advanced alerting and reporting mechanisms ensure that you are always in the know about your server’s health and performance, allowing you to make data-driven decisions for proactive issue resolution and strategic planning. Through our customizable dashboards, you'll have real-time insights at your fingertips, enhancing your capability to manage your servers effectively.

What features must the best server monitoring tool have?

The best server monitoring tools should offer a comprehensive suite of features that enable administrators to maintain optimal performance, security, and health across various server types. Key features include real-time monitoring, which allows for immediate detection of issues as they arise. A user-friendly dashboard is crucial for at-a-glance insights into server status and metrics. The tool should support monitoring for a wide array of server types, including web, database, application, file, and virtual servers.

Scalability is also a significant factor, as the tool should be capable of adapting to growing server environments without requiring extensive reconfiguration. Alerting and notification systems should be robust and customizable, enabling quick response to issues before they become critical. Advanced analytics and reporting features allow for historical data tracking, facilitating better long-term planning. The ability to integrate with other tools and platforms is essential for a holistic approach to IT management.

Security features like data encryption and role-based access control help protect sensitive information, while compliance features ensure that the tool meets industry-specific regulations. Lastly, cost-effectiveness is a must; the tool should balance its price and capabilities well. Therefore, the best server monitoring tool would be one that combines all these features in a user-friendly, secure, and scalable package.

Choosing the Right Monitoring Strategy

Choosing the right server monitoring strategy involves aligning the tool's capabilities with your organization's specific needs, including the types of servers you operate, your performance goals, and any compliance requirements. Your choice should take into account the complexity of your server environment—be it on-premises, cloud, or hybrid—as well as your budget and available resources. The ideal tool will offer both customization and scalability, allowing for easy adjustments as your business grows and technology evolves, all while providing robust reporting features for real-time insights and long-term analytics.


By partnering with Dataknox Solutions for server monitoring, you delegate the critical responsibility of overseeing your servers to experienced professionals. With our comprehensive monitoring, management, and support, you gain both the time and the confidence to focus on your core business functions. The combination of our state-of-the-art technology and client-centric approach ensures that your IT infrastructure is robust, secure, and aligned with your business goals.

Shayan Lamei - A Seasoned technology professional

Shayan Lamei


Shayan Lamei serves as the Director of Marketing and is deeply committed to leveraging technology to spotlight emerging tech innovations.