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Document net.inet.tcp.maxtcptw and net.inet.tcp.nolocaltimewait.

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Wording by:	Devon O'Dell
This commit is contained in:
glebius 2006-09-13 15:24:27 +00:00
parent fc2dc7ce4e
commit 2264a48ff4
1 changed files with 19 additions and 1 deletions
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20
share/man/man4/tcp.4
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@ -32,7 +32,7 @@
.\" From: @(#)tcp.4 8.1 (Berkeley) 6/5/93
.\" $FreeBSD$
.\"
.Dd August 25, 2005
.Dd September 13, 2006
.Dt TCP 4
.Os
.Sh NAME
@ -460,6 +460,24 @@ only.
.It Va sack.initburst
Control the number of SACK retransmissions done upon initiation of SACK
recovery.
.It Va maxtcptw
When a TCP connection enters the
.Dv TIME_WAIT
state, its associated socket structure is freed, since it is of
negligible size and use, and a new structure is allocated to contain a
minimal amount of information necessary for sustaining a connection in
this state, called the compressed TCP TIME_WAIT state.
Since this structure is smaller than a socket structure, it can save
a significant amount of system memory.
The
.Va net.inet.tcp.maxtcptw
MIB variable controls the maximum number of these structures allocated.
By default, it is initialized to
.Va kern.ipc.maxsockets
/ 5 .
.It Va nolocaltimewait
Suppress creating of compressed TCP TIME_WAIT states for connections in
which both endpoints are local.
.El
.Sh ERRORS
A socket operation may fail with one of the following errors returned: