Varnish Logging Tools

Varnish ships with a suite of log-analysis tools that read from the Varnish Shared Log (VSL). Tools include varnishlog (raw log streaming), varnishncsa (NCSA/Apache log format), varnishstat (live counters), varnishtop (real-time activity display), and varnishhist (response time histogram).

API entry from apis.yml

apis.yml Raw ↑
aid: varnish:varnish-logging
name: Varnish Logging Tools
description: Varnish ships with a suite of log-analysis tools that read from the Varnish Shared Log (VSL).
  Tools include varnishlog (raw log streaming), varnishncsa (NCSA/Apache log format), varnishstat (live
  counters), varnishtop (real-time activity display), and varnishhist (response time histogram).
humanURL: https://varnish-cache.org/docs/trunk/reference/
tags:
- Logging
- Monitoring
- Observability
- Statistics
properties:
- type: Documentation
  url: https://varnish-cache.org/docs/trunk/reference/varnishlog.html
- type: APIReference
  url: https://varnish-cache.org/docs/trunk/reference/varnishstat.html