Overview
Prometheus is a time-series based monitoring system (TSDB) focused on the pull model and dynamic environments. Zabbix is a classic monitoring system with a centralized relational database (RDBMS), supporting both push and pull methods.
| Parameter | Prometheus | Zabbix |
|---|---|---|
| Collection Model | Pull (polling) | Push/Pull (agents, SNMP) |
| Storage | Native TSDB | RDBMS (PostgreSQL, MySQL) |
| Discovery | Service Discovery (K8s, Cloud) | LDP, API, manual entry |
| Query Language | PromQL | SQL, built-in expressions |
| Visualization | Grafana (external) | Built-in dashboards |
Performance
Prometheus is optimized for millions of metrics with high update frequency. A single server can process up to 1,000,000 samples per second with moderate resource consumption, though RAM usage grows linearly with the number of time series. Zabbix is limited by database performance. Reaching 50,000 — 100,000 new values per second (NVPS) requires complex DB tuning and the use of Zabbix Proxies to distribute the load.
Configuration & complexity
Prometheus is configured via YAML files. The main focus is on automation through Service Discovery: the system automatically finds new containers or cloud instances.
scrape_configs:
- job_name: 'node'
kubernetes_sd_configs:
- role: nodeZabbix is primarily managed through a web interface. While it features templates and Low-Level Discovery (LLD), configuring complex dependencies and triggers often requires manual UI actions or API scripts.
When to choose what
Prometheus is the standard for Kubernetes, Docker, and microservices. It is indispensable when node lifecycles are short. Zabbix is effective for monitoring network hardware (SNMP), data center servers, office peripherals, and systems where asset inventory is critical.
Cost / licensing
Both systems are open source. Prometheus is distributed under the Apache 2.0 license, Zabbix under GPL v2. The main costs in both cases are data storage and engineering labor.
Ecosystem & integrations
The Prometheus ecosystem revolves around exporters (node_exporter, blackbox_exporter) and Grafana. Zabbix offers an "all-in-one" solution: collection, storage, visualization, and alerting in a single package, but also supports Grafana integration via plugins.
Verdict
Choose Prometheus if your infrastructure is dynamic, you use Kubernetes, and you need powerful metric analytics. Choose Zabbix if you need a comprehensive solution for hardware, networks, and stable server groups with deep permission hierarchies.