46 lines
2.5 KiB
Groff
46 lines
2.5 KiB
Groff
.TH QSDT 1 "May 2023" "mod_qos utilities 11.74" "qsdt man page"
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.SH NAME
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qsdt calculates the elapsed time between two related log messages.
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.SH SYNOPSIS
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qsdt [\-t <regex>] \-i <regex> \-s <regex> \-e <regex> [\-v] [<path>]
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.SH DESCRIPTION
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qsdt is a simple tool to search two different messages in a log file and calculates the elapsed time between these lines. The two log messages need a common identifier such an unique request id (UNIQUE_ID), a thread id, or a transaction code.
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.SH OPTIONS
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.TP
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\-t <regex>
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Defines a pattern (regular expression) matching the log line's timestamp. The pattern must include two sub\-expressions, one matching hours, minutes and seconds the other matching the milliseconds. Default pattern is ([0\-9]{2}:[0\-9]{2}:[0\-9]{2})[.,]([0\-9]{3})
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.TP
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\-i <regex>
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Pattern (regular expression) matching the identifier which the two messages have in common. The sub\-expression defines the part which needs to be extracted from the matching string. Note: You can also use the start (\-s) and end (\-e) pattern to define the sub\-expression matching this identifier.
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.TP
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\-s <regex>
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Defines the pattern (regular expression or literal string) identifying the first (start) of the two messages.
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.TP
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\-e <regex>
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Defines the pattern (regular expression or literal string) identifying the second (end) of the two messages.
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.TP
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\-v
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Verbose mode.
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.TP
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<path>
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Defines the input file to process. qsdt reads from from standard input if this parameter is omitted.
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.SH EXAMPLE
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Sample command line arguments:
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\-i ' ([a\-z0\-9]+) [A\-Z]+ ' \-s 'Received Request' \-e 'Received Response'
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matching those sample log messages:
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2018\-03\-12 16:34:08.653 threadid23 INFO Received Request
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2018\-03\-13 16:35:09.891 threadid23 DEBUG MessageHandler Received Response
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.SH NOTE
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The four patterns (t,i,s,e) are concatenated into two search patterns:
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first (start): [t (HH:MM:SS)(SSS) ].*[i (id) ].*[s ]
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second (end): [t (HH:MM:SS)(SSS) ].*[i (id) ].*[e ]
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And the three sub\-expression are used to extract the timestamp and the unique identifier that the start and end message have in common. This means that you could specify the sub\-expression for the unique identifier in the start (\-s) or end (\-e) pattern alternatively, e.g. in case the identifier is at the end of the log line.
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.SH SEE ALSO
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qsexec(1), qsfilter2(1), qsgeo(1), qsgrep(1), qshead(1), qslog(1), qslogger(1), qspng(1), qsre(1), qsrespeed(1), qsrotate(1), qssign(1), qstail(1)
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.SH AUTHOR
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Pascal Buchbinder, http://mod-qos.sourceforge.net/
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