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Add descriptions of the new options SOMAXKVA, TCP_INIT_WIN and IFQ_MAXLEN.

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While here, also write descriptions of TCP_SENDSPACE, TCP_RECVSPACE and SB_MAX.
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ragge 2003-07-03 20:13:26 +00:00
parent b362262fa2
commit 101a9d3a8a
1 changed files with 31 additions and 1 deletions
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32
share/man/man4/options.4
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@ -1,4 +1,4 @@
.\" $NetBSD: options.4,v 1.214 2003/07/02 17:33:33 heas Exp $
.\" $NetBSD: options.4,v 1.215 2003/07/03 20:13:26 ragge Exp $
.\"
.\" Copyright (c) 1996
.\" Perry E. Metzger. All rights reserved.
@ -1346,6 +1346,10 @@ and received over (currently) internet and appletalk addresses.
.\"This can be a fairly expensive operation, so you probably want to
.\"keep this disabled.
The option is not recommended as it degrades system stability.
.It Cd options IFQ_MAXLEN=value
Increases the allowed size of the network interface packet queues.
The default queue size is 50 packets, and you do not normally need
to increase it.
.It Cd options MROUTING
Includes support for IP multicast routers.
You certainly want
@ -1636,6 +1640,19 @@ is set.
Number of packets to record for
.Em TCP_DEBUG .
Defaults to 100.
.It Cd options TCP_SENDSPACE=value
.It Cd options TCP_RECVSPACE=value
These options sets the max TCP window size to other sizes than the default.
The TCP window sizes can be altered via
.Xr sysctl 8
as well.
.It Cd options TCP_INIT_WIN=value
This option sets the initial TCP window size for non-local connections,
which is used when the transmission starts. The default size is 1,
but if the machine should act more aggressive the initial size can be
set to some other value. The initial TCP window size can be set via
.Xr sysctl 8
as well.
.It Cd options PFIL_HOOKS
This option turns on the packet filter interface hooks.
See
@ -1773,6 +1790,19 @@ These options are provided in the event the computed value is
insufficient resulting in an
.Dq out of space in kmem_map
panic.
.It Cd options SB_MAX=value
Sets the max size in bytes that a socket buffer is allowed to occupy.
The default is 256k, but sometimes it need to be increased, for example
when using large TCP windows. This option can be changed via
.Xr sysctl 8
as well.
.It Cd options SOMAXKVA=value
Sets the maximum size of kernel virtual memory that the socket buffers
are allowed to use. The default is 16MB, but in situations where for
example large TCP windows are used this value must also be increased.
This option can be changed via
.Xr sysctl 8
as well.
.It Cd options BUFCACHE=value
Size of the buffer cache as a percentage of total available
.Tn RAM .