$cat /proc/sys/net/ipv4/tcp_orphan_retries
0
$
tcp_orphan_retries - INTEGER
This value influences the timeout of a locally closed TCP connection,
when RTO retransmissions remain unacknowledged. See
tcp_retries2 for more details.
The default value is 7
If your machine is a loaded WEB server, you should think about
lowering this value, such sockets may consume significant resources.
Cf. tcp_max_orphans.
source :
Linux Kernel Documentation . 2.6.32
net/ipv4/tcp_timer.c - 39 identical
99: static int tcp_orphan_retries(struct sock *sk, int alive)
100: {
101: int retries = sysctl_tcp_orphan_retries; /* May be zero. */
157: retry_until = tcp_orphan_retries(sk, alive);
158:
android.git.kernel.org/kernel/msm.git - GPL - C - More from msm.git »
shaper.queues
176: echo "Set number of orphant retries to 5"
177: echo 5 > /proc/sys/net/ipv4/tcp_orphan_retries
178:
www.chronox.de/tc+filter/shaper-0.2.tar.bz2 - Unknown - Shell - More from shaper-0.2.tar.bz2 »
usr/share/man/man7/tcp.7
282: .TP
283: .B tcp_orphan_retries
284: The maximum number of attempts made to probe the other
www2.cddc.vt.edu/linux/distributions/7linux/7v6/7base/7v6a11.tar.bz2 - Unknown - Troff -
3.3.15. tcp_orphan_retries
The tcp_orphan_retries variable tells the TCP/IP stack how many times
to retry to kill connections on the other side before killing it on our
own side. If your machine runs as a highly loaded http server it may
be worth thinking about lowering this value. http sockets will consume
large amounts of resources if not checked.
This variable takes an integer value. The default value for this variable
is 7, which would approximately correspond to 50 seconds through 16
minutes depending on the Retransmission Timeout (RTO). For a
complete explanation of the RTO, read the "3.7. Data Communication"
section in RFC 793 - Transmission Control Protocol.
source :
Ipsysctl tutorial 1.0.4
Oskar Andreasson
blueflux@koffein.net
Copyright © 2002 by Oskar Andreasson
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