Example Output

Example Output + +

Sample output is provided here.

Server Software:        Apache/2.2.17
+Server Hostname:        testserver.com
+Server Port:            80
+
+Document Path:          /index.html
+Document Length:        787 bytes
+
+Concurrency Level:      5
+Time taken for tests:   0.436 seconds
+Complete requests:      1000
+Failed requests:        0
+Write errors:           0
+Total transferred:      1026000 bytes
+HTML transferred:       787000 bytes
+Requests per second:    2292.26 [#/sec] (mean)
+Time per request:       2.181 [ms] (mean)
+Time per request:       0.436 [ms] (mean, across all concurrent requests)
+Transfer rate:          2296.74 [Kbytes/sec] received
+
+Connection Times (ms)
+              min  mean[+/-sd] median   max
+Connect:        0    1   0.4      1       3
+Processing:     1    1   0.4      1       3
+Waiting:        0    1   0.5      1       2
+Total:          2    2   0.1      2       3
+
+Percentage of the requests served within a certain time (ms)
+  50%      2
+  66%      2
+  75%      2
+  80%      2
+  90%      2
+  95%      2
+  98%      2
+  99%      3
+ 100%      3 (longest request)

+ +

The output may vary depending on the command line parameters given. + Possible output with a brief explanation of each element is listed below. +

+ +

Server Software: The value, if any, returned in the server HTTP header + of the first successful response. This includes all characters in the + header from beginning to the point a character with decimal value of 32 + (most notably: a space or CR/LF) is detected.
Server Hostname: The DNS or IP address given on the command line
Server Port: The port to which ab is connecting. If no port is given on the + command line, this will default to 80 for http and 443 for + https.
SSL/TLS Protocol: The protocol parameters negotiated between the client and server. + This will only be printed if SSL is used.
Document Path: The request URI parsed from the command line string.
Document Length: This is size in bytes of the first succesfully returning document. + If the document length changes during testing, the response is + considered an error.
Concurrency Level: The number of concurrent clients used during the test
Time taken for tests: This is the time taken from the moment the first socket connection + is created to the moment the last response is recieved
Complete requests: The number of successful responses recieved
Failed requests: The number of requests that were considered a failure. If the + number is greater than zero, another line will be printed showing the + numer of requests that failed due to connecting, reading, incorrect + content length, or exceptions.
Write errors: The number of errors that failed during write (broken pipe).
Non-2xx responses: The number of responses that were not in the 200 series of response + codes. If all responses were 200, this field is not printed.
Keep-Alive requests: The number of connections that resulted in Keep-Alive requests
Total body sent: If configured to send data as part of the test, this is the total + number of bytes sent during the tests. This field is omitted if the test + did not include a body to send.
Total transferred: The total number of bytes received from the server. This number + is essentially the number of bytes sent over the wire.
HTML transferred: The total number of document bytes received from the server. This + number excludes bytes received in HTTP headers
Requests per second: This is the number of requests per second. This value is the result + of dividing the number of requests by the total time taken
Time per request: The average time spent per request. The first value is calculated + with the formula concurrency * timetaken * 1000 / done + while the second value is calculated with the formula + timetaken * 1000 / done
Transfer rate: The rate of transfer as calculated by the formula + totalread / 1024 / timetaken