tcprstat 很不错的服务器时延统计工具

./tcprstat --help

tcprstat 0.3.1, libpcap version 1.1.1.

Usage: tcprstat [--port <port>] [--format=<format>] [--interval=<sec>]

             [--header[=<header>] | --no-header] [--iterations=<it>]

             [--read=<file>]

       tcprstat --version | --help

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    --read <file>, -r    Capture from pcap file <file>, not live.

    --time <ms>, -T     time delay > -T(time) count stastic.

    --log  <file>, -o   if time dealy > -T(time), timestamp record to log file.

    --local <addresses>, -l

                         <addresses> is a comma-separated list of ip

                         addresses, which are used as the local list of

                         addresses instead of pcap getting the list.

                         This is useful when working with a pcap file got

                         from another host with different addresses.

    --port <port>, -p    Capture traffic only for tcp/<port>.

    --format <format>, -f

                         Output format. Argument is a string detailing

                         how the information is presented. Accepted codes:

                             %n - Response time count

                             %a - Response time media in microseconds

                             %s - Response time sum

                             %x - Response time squares sum

                             %m - Minimum value

                             %M - Maximum value

                             %T - counts that package delay time(default 40ms)

                             %h - Median value

                             %S - Standard deviation

                             %v - Variance (square stddev)

                             %I - Iteration number

                             %t - Timestamp since iteration zero

                             %T - Unix timestamp

                             %% - A literal %

                         Default is:

    "%T\t%n\t%M\t%m\t%a\t%h\t%S\t%C\t%95M\t%95a\t%95S\t%99M\t%99a\t%99S\n".

                         Statistics may contain a percentile between

                         the percentage sign and the code: %99n, %95a.

    --header[=<header>], --no-header

                         Whether to output a header. If not supplied, a

                         header is created out of the format. By default,

                         the header is shown.

    --interval <seconds>, -t

                         Output interval. Default is 10.

    --iterations <n>, -n

                         Output iterations. Default is 1, 0 is infinity

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    --help               Shows program information and usage.

    --version            Shows version information.

yum install -y redis

./tcprstat -p 6379 -t 1  -n 0

redis-benchmark