xenial (1) varnishhist.1.gz

NAME

       varnishhist - Varnish request histogram

SYNOPSIS

       varnishhist  [-C]  [-d]  [-g  <request|vxid>]  [-h]  [-L  limit]  [-n name] [-N filename] [-p period] [-P
       <size|responsetime|tag:field_num:min:max>] [-q query] [-r filename] [-t <seconds|off>] [-T seconds] [-V]

DESCRIPTION

       The varnishhist utility reads  varnishd(1)  shared  memory  logs  and  presents  a  continuously  updated
       histogram  showing  the  distribution of the last N requests by their processing.  The value of N and the
       vertical scale are displayed in the top left corner.  The horizontal  scale  is  logarithmic.   Hits  are
       marked with a pipe character ("|"), and misses are marked with a hash character ("#").

       The following options are available:

       -C     Do all regular expression and string matching caseless.

       -d     Start processing log records at the head of the log instead of the tail.

       -g <request|vxid>
              The grouping of the log records. The default is to group by vxid.

       -h     Print program usage and exit

       -L limit
              Sets  the  upper  limit  of  incomplete  transactions  kept before the oldest transaction is force
              completed. A warning record is synthesized when this happens. This setting keeps an upper bound on
              the memory usage of running queries. Defaults to 1000 transactions.

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

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

       -p period
              Specified  the number of seconds between screen refreshes. Default is 1 second, and can be changed
              at runtime by pressing the [1-9] keys.

       -P <size|responsetime|tag:field_num:min:max>
              Either specify "size" or "responsetime" profile or create a new one. Define  the  tag  we'll  look
              for, and the field number of the value we are interested in. min and max are the boundaries of the
              graph (these are power of tens).

       -q query
              Specifies the VSL query to use.

       -r filename
              Read log in binary file format from this  file.  The  file  can  be  created  with  varnishlog  -w
              filename.

       -t <seconds|off>
              Timeout  before  returning  error  on initial VSM connection. If set the VSM connection is retried
              every 0.5 seconds for this many 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 indefinetely for the Varnish instance to appear.  Defaults to 5 seconds.

       -T seconds
              Sets the transaction timeout in seconds. This  defines  the  maximum  number  of  seconds  elapsed
              between  a  Begin tag and the End tag. If the timeout expires, a warning record is synthesized and
              the transaction is force completed. Defaults to 120 seconds.

       -V     Print version information and exit.

SEE ALSO

       • varnishd(1)

       • varnishlog(1)

       • varnishncsa(1)

       • varnishstat(1)

       • varnishtop(1)

HISTORY

       The varnishhist utility was developed by Poul-Henning Kamp  in  cooperation  with  Verdens  Gang  AS  and
       Varnish Software AS. This manual page was written by Dag-Erling Smørgrav.

COPYRIGHT

       This document is licensed under the same licence as Varnish itself. See LICENCE for details.

       • Copyright (c) 2006 Verdens Gang AS

       • Copyright (c) 2006-2015 Varnish Software AS

                                                                                                  VARNISHHIST(1)