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<!--
title: "Varnish Cache monitoring with Netdata"
custom_edit_url: https://github.com/netdata/netdata/edit/master/collectors/python.d.plugin/varnish/README.md
sidebar_label: "Varnish Cache"
-->
# Varnish Cache monitoring with Netdata
Provides HTTP accelerator global, Backends (VBE) and Storages (SMF, SMA, MSE) statistics using `varnishstat` tool.
Note that both, Varnish-Cache (free and open source) and Varnish-Plus (Commercial/Enterprise version), are supported.
## Requirements
- `netdata` user must be a member of the `varnish` group
## Charts
This module produces the following charts:
- Connections Statistics in `connections/s`
- Client Requests in `requests/s`
- All History Hit Rate Ratio in `percent`
- Current Poll Hit Rate Ratio in `percent`
- Expired Objects in `expired/s`
- Least Recently Used Nuked Objects in `nuked/s`
- Number Of Threads In All Pools in `pools`
- Threads Statistics in `threads/s`
- Current Queue Length in `requests`
- Backend Connections Statistics in `connections/s`
- Requests To The Backend in `requests/s`
- ESI Statistics in `problems/s`
- Memory Usage in `MiB`
- Uptime in `seconds`
For every backend (VBE):
- Backend Response Statistics in `kilobits/s`
For every storage (SMF, SMA, or MSE):
- Storage Usage in `KiB`
- Storage Allocated Objects
## Configuration
Edit the `python.d/varnish.conf` configuration file using `edit-config` from the Netdata [config
directory](/docs/configure/nodes.md), which is typically at `/etc/netdata`.
```bash
cd /etc/netdata # Replace this path with your Netdata config directory, if different
sudo ./edit-config python.d/varnish.conf
```
Only one parameter is supported:
```yaml
instance_name: 'name'
```
The name of the `varnishd` instance to get logs from. If not specified, the host name is used.
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