varnishstat - Online in the Cloud

PROGRAM:

NAME

varnishstat - Varnish Cache statistics

SYNOPSIS

varnishstat [-1] [-x] [-j] [-f field] [-l] [-n varnish_name] [-N filename] [-t
seconds|<off>] [-V]

DESCRIPTION

The varnishstat utility displays statistics from a running varnishd(1) instance.

OPTIONS

The following options are available:

-1 Instead of presenting a continuously updated display, print the statistics to
stdout.

-f Field inclusion glob. A field glob consists of three parts, type, ident and name,
where ident is optional. Each part can contain a '*' character at the end to match
a prefix. Use backslash to escape characters. If the argument starts with '^' it is
used as an exclusion glob. Multiple -f arguments may be given, and they will be
applied in order.

-l Lists the available fields to use with the -f option.

-n Specifies the name of the varnishd instance to get logs from. If -n is not
specified, the host name is used.

-N Specify a the filename of a stale VSM instance. When using this option the
abandonment checking is disabled.

-t seconds|<off>
Timeout before returning error on initial VSM connection. If set the VSM
connection is retried every 0.5 seconds for this any seconds. If zero the
connection is attempted only once and will fail immediately if unsuccessful. If set
to "off", the connection will not fail, allowing the utility to start and wait
indefinitely for the Varnish instance to appear. Defaults to 5 seconds.

-V Display the version number and exit.

-x Displays the result as XML.

-j Displays the result as JSON.

CURSES MODE

When neither -1, -j or -x options are given, the application starts up in curses mode.
This shows a continuously updated view of the counter values, along with their
description.

The top area shows process uptime information.

The center area shows a list of counter values.

The bottom area shows the description of the currently selected counter.

Columns
The following columns are displayed, from left to right:

Name The name of the counter

Current
The current value of the counter.

Change The average per second change over the last update interval.

Average
The average value of this counter over the runtime of the Varnish daemon, or a
period if the counter can't be averaged.

Avg_10 The moving average over the last 10 update intervals.

Avg_100
The moving average over the last 100 update intervals.

Avg_1000
The moving average over the last 1000 update intervals.

Key bindings
The following keys control the interactive display:

<UP> Navigate the counter list one line up.

<DOWN> Navigate the counter list one line down.

<PAGEUP> or <b>
Navigate the counter list one page up.

<PAGEDOWN> or <SPACE>
Navigate the counter list one page down.

<d> Toggle between showing and hiding unseen counters. Unseen counters are those that
has been zero for the entire runtime of varnishstat. Defaults to hide unseen
counters.

<e> Toggle scaling of values.

<g> Go to the top of the counter list.

<G> Go to the bottom of the counter list.

<v> Cycle through the verbosity levels. Defaults to only showing informational
counters.

<q> Quit.

<CTRL+T>
Sample now.

XML OUTPUT

When using the -x option, the output is:

<varnishstat timestamp="YYYY-MM-DDTHH:mm:SS">
<stat>
<type>FIELD TYPE</type>
<ident>FIELD IDENT</ident>
<name>FIELD NAME</name>
<value>FIELD VALUE</value>
<flag>FIELD SEMANTICS</flag>
<format>FIELD DISPLAY FORMAT</format>
<description>FIELD DESCRIPTION</description>
</stat>
[..]
</varnishstat>

JSON OUTPUT

With -j the output format is:

{
"timestamp": "YYYY-MM-DDTHH:mm:SS",
"FIELD NAME": {
"description": "FIELD DESCRIPTION",
"type": "FIELD TYPE", "ident": "FIELD IDENT", "flag": "FIELD SEMANTICS", "format": "FIELD DISPLAY FORMAT",
"value": FIELD VALUE
},
"FIELD2 NAME": {
"description": "FIELD2 DESCRIPTION",
"type": "FIELD2 TYPE", "ident": "FIELD2 IDENT", "flag": "FIELD2 SEMANTICS", "format": "FIELD2 DISPLAY FORMAT",
"value": FIELD2 VALUE
},
[..]
}

Type and ident are optional. Timestamp is the time when the report was generated by
varnishstat.

Repeated output with -1, -x or -j will have a single empty line (\n) between each block of
output.

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