04.11.2025 - Henrique Canha · 4 min read

Zabbix: how to monitor servers and applications in real time

Zabbix is one of the most powerful open-source platforms for real-time monitoring of IT infrastructure. Whether you're tracking server performance, network devices, or application health, Zabbix provides comprehensive visibility and alerting capabilities in a single, scalable solution.

In this article, we’ll walk through how to monitor servers and applications in real time with Zabbix, covering configuration, triggers, dashboards, and alerting.

Key Takeaways

Zabbix supports agent-based and agentless monitoring, with data collection intervals down to seconds.
Server monitoring starts with installing the agent, pointing it to the Zabbix server and linking an OS template to the host.
Application monitoring uses built-in templates for Apache, MySQL and PostgreSQL, HTTP checks and custom UserParameters.
Triggers with severity levels and escalating actions turn metrics into real-time alerts by email, SMS, Slack or Microsoft Teams.
Encrypt agent traffic with PSK or certificates, and tune caches and proxies to keep performance stable at scale.

Why use Zabbix for real-time monitoring?

Why use Zabbix for real-time monitoring

Zabbix offers:

Agent-based and agentless monitoring
Second-level data collection intervals
Real-time dashboards and SLA widgets
Trigger-based alerts with severity levels
Scalable architecture with proxy support

These features make Zabbix ideal for enterprises and MSPs requiring centralised visibility and automation.

Monitoring servers with Zabbix

Step 1: Install Zabbix agent

Install Zabbix agent on Linux or Windows servers:

dnf install -y zabbix-agent
systemctl enable --now zabbix-agent

Step 2: Configure agent

Edit /etc/zabbix/zabbix_agentd.conf:

Server=<zabbix_server_ip>
ServerActive=<zabbix_server_ip>
Hostname=server01.example.com

Step 3: Add host in Zabbix frontend

Navigate to Configuration > Hosts > Create Host and:

Set the hostname and IP
Link the Template OS Linux/Windows

Zabbix will start collecting:

CPU usage
Memory consumption
Disk I/O
Network bandwidth

Modernise Your Monitoring Discover how Syone helps organisations implement, optimise, and manage Zabbix for greater visibility and operational efficiency.

Monitoring applications with Zabbix

Zabbix supports both built-in and custom checks:

Application metrics:

Web services availability (HTTP checks)
Database responsiveness
Application logs (via external scripts)

Setup examples:

Use Template App Apache by HTTP for web servers
Use Template DB MySQL or Template DB PostgreSQL for databases
Create UserParameter for custom metrics (e.g. error count)

Visualization:

Build dashboards using graphs, SLA reports, and value maps
Add application status widgets to NOC views

Real-time alerts and actions

Zabbix allows precise alerting:

Triggers with expressions like: last(/host/system.cpu.load[percpu,avg1])>5
Severity levels: Info, Warning, High, Disaster
Actions with escalations (e.g., email on-call team, restart service)

Multi-channel notifications:

Email, SMS, Slack, MS Teams, webhook

Dashboard setup for live visibility

Zabbix dashboards support:

Real-time graphs updated every few seconds
SLA compliance widgets
Multi-host views by groups (e.g., dev, prod)
Map-based monitoring for geodistributed systems

Tips:

Use screen widgets for compact overviews
Clone dashboards for each team or tenant

Security and performance best practices

Secure your setup:

Use PSK or certificate-based encryption between agents and server
Assign roles with fine-grained permissions

Performance tuning:

Adjust CacheSize, HistoryCacheSize, TrendCacheSize
Use proxies for remote networks
Optimize housekeeper settings for DB load

How Syone helps you implement real-time monitoring with Zabbix

As a certified Zabbix partner and Open Source Competence Center, Syone provides:

Architecture planning for high-availability Zabbix deployments
Agent automation and template customization
Dashboard design for NOCs and IT operations
Integration with ITSM and alerting tools
Managed services with SLA-backed support

Whether you're starting from scratch or expanding an existing environment, Syone delivers tailored Zabbix expertise to help you achieve real-time visibility and operational excellence.

Learn more about our Zabbix implementation and support or contact our team for a customized implementation plan.

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Frequently asked questions

Can Zabbix monitor servers in real time?

Yes. Zabbix can collect data at intervals of a few seconds and its dashboards update continuously, so teams can follow CPU, memory, disk and network usage as it happens and receive alerts as soon as a threshold is crossed.

Does Zabbix require an agent on every server?

No. Zabbix supports agent-based monitoring for detailed OS-level metrics and agentless monitoring through protocols such as SNMP, HTTP checks and IPMI. Most environments combine both approaches.

How can I monitor a custom application metric with Zabbix?

You can define a UserParameter in the agent configuration or use external scripts to collect custom values, such as error counts. Built-in templates also cover common applications like Apache, MySQL and PostgreSQL.

How does Zabbix send alerts?

Zabbix uses triggers to detect problems and actions to notify people or run commands. Alerts can have different severity levels and escalation steps, and can be sent by email, SMS, Slack, Microsoft Teams or webhooks.

How do I secure communication between Zabbix agents and the server?

Use PSK or certificate-based encryption between agents and the server, and assign user roles with fine-grained permissions in the frontend. For remote networks, Zabbix proxies help keep traffic controlled.