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diff --git a/tools/man1/qsdt.1 b/tools/man1/qsdt.1 new file mode 100644 index 0000000..ed58005 --- /dev/null +++ b/tools/man1/qsdt.1 @@ -0,0 +1,46 @@ +.TH QSDT 1 "May 2023" "mod_qos utilities 11.74" "qsdt man page" + +.SH NAME +qsdt calculates the elapsed time between two related log messages. +.SH SYNOPSIS +qsdt [\-t <regex>] \-i <regex> \-s <regex> \-e <regex> [\-v] [<path>] +.SH DESCRIPTION +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. +.SH OPTIONS +.TP +\-t <regex> +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}) +.TP +\-i <regex> +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. +.TP +\-s <regex> +Defines the pattern (regular expression or literal string) identifying the first (start) of the two messages. +.TP +\-e <regex> +Defines the pattern (regular expression or literal string) identifying the second (end) of the two messages. +.TP +\-v +Verbose mode. +.TP +<path> +Defines the input file to process. qsdt reads from from standard input if this parameter is omitted. +.SH EXAMPLE +Sample command line arguments: + + \-i ' ([a\-z0\-9]+) [A\-Z]+ ' \-s 'Received Request' \-e 'Received Response' + + matching those sample log messages: + 2018\-03\-12 16:34:08.653 threadid23 INFO Received Request + 2018\-03\-13 16:35:09.891 threadid23 DEBUG MessageHandler Received Response + +.SH NOTE +The four patterns (t,i,s,e) are concatenated into two search patterns: + first (start): [t (HH:MM:SS)(SSS) ].*[i (id) ].*[s ] + second (end): [t (HH:MM:SS)(SSS) ].*[i (id) ].*[e ] + +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. +.SH SEE ALSO +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) +.SH AUTHOR +Pascal Buchbinder, http://mod-qos.sourceforge.net/ |