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Diffstat (limited to 'share/man/man4')
-rw-r--r-- | share/man/man4/tcp.4 | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/share/man/man4/tcp.4 b/share/man/man4/tcp.4 index 9e3ff83..d3c5c47 100644 --- a/share/man/man4/tcp.4 +++ b/share/man/man4/tcp.4 @@ -365,8 +365,22 @@ as well as reducing the algorithm's ability to adapt to changing situations and should only be done as a last resort. .It tcp.rfc3042 Enable the Limited Transmit algorithm as described in RFC 3042. It -helps avoid timeouts on lossy links. This is a standards track RFC +helps avoid timeouts on lossy links and also when the congestion window +is small, as happens on short transfers. This is a standards track RFC and is off by default. +.It tcp.rfc3390 +Enable support for RFC 3390, which allows for a variable-sized +starting congestion window on new connections, depending on the +maximum segment size. This helps throughput in general, but +particularly affects short transfers and high-bandwidth large +propagation-delay connections. This is a standards track RFC and +support for it is off by default. +.Pp +When this feature is enabled, the slowstart_flightsize and +local_slowstart_flightsize settings are not observed for new +connection slow starts, but they are still used for slow starts +that occur when the connection has been idle and starts sending +again. .El .Sh ERRORS A socket operation may fail with one of the following errors returned: |