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.. _h2load-1-output:
OUTPUT
------
requests
total
The number of requests h2load was instructed to make.
started
The number of requests h2load has started.
done
The number of requests completed.
succeeded
The number of requests completed successfully. Only HTTP status
code 2xx or3xx are considered as success.
failed
The number of requests failed, including HTTP level failures
(non-successful HTTP status code).
errored
The number of requests failed, except for HTTP level failures.
This is the subset of the number reported in ``failed`` and most
likely the network level failures or stream was reset by
RST_STREAM.
timeout
The number of requests whose connection timed out before they were
completed. This is the subset of the number reported in
``errored``.
status codes
The number of status code h2load received.
traffic
total
The number of bytes received from the server "on the wire". If
requests were made via TLS, this value is the number of decrypted
bytes.
headers
The number of response header bytes from the server without
decompression. The ``space savings`` shows efficiency of header
compression. Let ``decompressed(headers)`` to the number of bytes
used for header fields after decompression. The ``space savings``
is calculated by (1 - ``headers`` / ``decompressed(headers)``) *
100. For HTTP/1.1, this is usually 0.00%, since it does not have
header compression. For HTTP/2, it shows some insightful numbers.
data
The number of response body bytes received from the server.
time for request
min
The minimum time taken for request and response.
max
The maximum time taken for request and response.
mean
The mean time taken for request and response.
sd
The standard deviation of the time taken for request and response.
+/- sd
The fraction of the number of requests within standard deviation
range (mean +/- sd) against total number of successful requests.
time for connect
min
The minimum time taken to connect to a server including TLS
handshake.
max
The maximum time taken to connect to a server including TLS
handshake.
mean
The mean time taken to connect to a server including TLS
handshake.
sd
The standard deviation of the time taken to connect to a server.
+/- sd
The fraction of the number of connections within standard
deviation range (mean +/- sd) against total number of successful
connections.
time for 1st byte (of (decrypted in case of TLS) application data)
min
The minimum time taken to get 1st byte from a server.
max
The maximum time taken to get 1st byte from a server.
mean
The mean time taken to get 1st byte from a server.
sd
The standard deviation of the time taken to get 1st byte from a
server.
+/- sd
The fraction of the number of connections within standard
deviation range (mean +/- sd) against total number of successful
connections.
req/s
min
The minimum request per second among all clients.
max
The maximum request per second among all clients.
mean
The mean request per second among all clients.
sd
The standard deviation of request per second among all clients.
server.
+/- sd
The fraction of the number of connections within standard
deviation range (mean +/- sd) against total number of successful
connections.
FLOW CONTROL
------------
h2load sets large flow control window by default, and effectively
disables flow control to avoid under utilization of server
performance. To set smaller flow control window, use :option:`-w` and
:option:`-W` options. For example, use ``-w16 -W16`` to set default
window size described in HTTP/2 protocol specification.
SEE ALSO
--------
:manpage:`nghttp(1)`, :manpage:`nghttpd(1)`, :manpage:`nghttpx(1)`
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