1VARNISHHIST(1) VARNISHHIST(1)
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6 varnishhist - Varnish request histogram
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9 varnishhist [-B <factor>] [-C] [-d] [-g <request|vxid>] [-h] [-L
10 <limit>] [-n <dir>] [-p <period>] [-P responsetime] [-P reqbodytime]
11 [-P size] [-P Bereqtime] [-P Beresptime] [-P BerespBodytime] [-P
12 Besize] [-P <[cb:]tag:[prefix]:field_num[:min:max]>] [-Q <file>] [-q
13 <query>] [-r <filename>] [-t <seconds|off>] [-T <seconds>] [-V]
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16 The varnishhist utility reads varnishd(1) shared memory logs and
17 presents a continuously updated histogram showing the distribution of
18 the last N requests by their processing. The value of N and the verti‐
19 cal scale are displayed in the top left corner. The horizontal scale
20 is logarithmic. Hits are marked with a pipe character ("|"), and
21 misses are marked with a hash character ("#").
22 The following options are available:
24 -B <factor>
26 Factor to bend time by. Particularly useful when [-r]eading from
27 a vsl file. =1 process in near real time, <1 slow-motion, >1
28 time-lapse (useless unless reading from a file). At runtime, <
29 halves and > doubles.
30 -C Do all regular expression and string matching caseless.
32 -d Process log records at the head of the log and exit.
34 -g <request|vxid>
36 The grouping of the log records. The default is to group by
37 vxid.
38 -h Print program usage and exit
40 -L <limit>
42 Sets the upper limit of incomplete transactions kept before the
43 oldest transaction is force completed. A warning record is syn‐
44 thesized when this happens. This setting keeps an upper bound on
45 the memory usage of running queries. Defaults to 1000 transac‐
46 tions.
47 -n <dir>
49 Specify the varnishd working directory (also known as instance
50 name) to get logs from. If -n is not specified, the host name is
51 used.
52 -p <period>
54 Specified the number of seconds between screen refreshes.
55 Default is 1 second, and can be changed at runtime by pressing
56 the [0-9] keys (powers of 2 in seconds or + and - (double/halve
57 the speed).
58 -P responsetime
60 Predefined client profile: graph the total time from start of
61 request processing (first byte received) until ready to deliver
62 the client response (field 3 of SLT_Timestamp Process: VSL tag).
63 -P reqbodytime
65 Predefined client profile: graph the time for reading the
66 request body (field 3 of SLT_Timestamp ReqBody: VSL tag).
67 -P size
69 Predefined client profile: graph the size of responses (field 5
70 of SLT_ReqAcct VSL tag).
71 -P Bereqtime
73 Predefined backend profile: graph the time from beginning of
74 backend processing until a backend request is sent completely
75 (field 3 of SLT_Timestamp Bereq: VSL tag).
76 -P Beresptime
78 Predefined backend profile: graph the time from beginning of
79 backend processing until the response headers are being received
80 completely (field 3 of SLT_Timestamp Beresp: VSL tag).
81 -P BerespBodytime
83 Predefined backend profile: graph the time from beginning of
84 backend processing until the response body has been received
85 (field 3 of SLT_Timestamp BerespBody: VSL tag).
86 -P Besize
88 Predefined backend profile: graph the backend response body size
89 (field 5 of SLT_BereqAcct VSL tag).
90 -P <[cb:]tag:[prefix]:field_num[:min:max]>
92 Graph the given custom definition defined as: an optional
93 (c)lient or (b)ackend filter (defaults to client), the tag we'll
94 look for, a prefix to look for (can be empty, but must be termi‐
95 nated by a colon) and the field number of the value we are
96 interested in. min and max are the boundaries of the graph in
97 powers of ten and default to -6 and 3.
98 -Q <file>
100 Specifies the file containing the VSL query to use. When multi‐
101 ple -Q or -q options are specified, all queries are considered
102 as if the 'or' operator was used to combine them.
103 -q <query>
105 Specifies the VSL query to use. When multiple -q or -Q options
106 are specified, all queries are considered as if the 'or' opera‐
107 tor was used to combine them.
108 -r <filename>
110 Read log in binary file format from this file. The file can be
111 created with varnishlog -w filename.
112 -t <seconds|off>
114 Timeout before returning error on initial VSM connection. If set
115 the VSM connection is retried every 0.5 seconds for this many
116 seconds. If zero the connection is attempted only once and will
117 fail immediately if unsuccessful. If set to "off", the connec‐
118 tion will not fail, allowing the utility to start and wait inde‐
119 finetely for the Varnish instance to appear. Defaults to 5 sec‐
120 onds.
121 -T <seconds>
123 Sets the transaction timeout in seconds. This defines the maxi‐
124 mum number of seconds elapsed between a Begin tag and the End
125 tag. If the timeout expires, a warning record is synthesized and
126 the transaction is force completed. Defaults to 120 seconds.
127 -V Print version information and exit.
129 --optstring
131 Print the optstring parameter to getopt(3) to help writing wrap‐
132 per scripts.
133
135 · varnishd(1)
136 · varnishlog(1)
138 · varnishncsa(1)
140 · varnishstat(1)
142 · varnishtop(1)
144 · vsl(7)
146
148 The varnishhist utility was developed by Poul-Henning Kamp in coopera‐
149 tion with Verdens Gang AS and Varnish Software AS. This manual page was
150 written by Dag-Erling Smørgrav.
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153 This document is licensed under the same licence as Varnish itself. See
154 LICENCE for details.
155 · Copyright (c) 2006 Verdens Gang AS
157 · Copyright (c) 2006-2015 Varnish Software AS
159 VARNISHHIST(1)