From: kuznet@ms2.inr.ac.ru
To: magnus.walldal@b-linc.COM (Magnus Walldal)
Cc: linux-kernel@vger.kernel.org
Subject: Re: 2.4.1 errors under heavy network load
Date: Mon, 12 Feb 2001 23:31:17 +0300 (MSK) [thread overview]
Message-ID: <200102122031.XAA31392@ms2.inr.ac.ru> (raw)
In-Reply-To: <HFEDLHHPHHEOBHLNPJOKMEHECAAA.magnus.walldal@b-linc.com> from "Magnus Walldal" at Feb 12, 1 08:45:07 pm
Hello!
> Then we did the following tuning attempt:
Please, cat /proc/net/tcp and /proc/net/sockstat
and send result to me (gzipped), together with /proc/sys/net/ipv4/tcp_*
values
> echo "20480" > /proc/sys/net/ipv4/tcp_max_orphans
Also, you want to increase memory allowed for TCP
echo "X/2 X/2 X" > /proc/sys/net/ipv4/tcp_mem
where X is memory in pages.
20480 is a crazy number. Valid applications cannot leave
so much of orphans. Do you understand that this is more than
80MB of wasted memory?
> echo "1" > tcp_orphan_retries
Bad idea. Default value is the lowest possible.
> echo 30 > /proc/sys/net/ipv4/tcp_keepalive_time
> echo 2 > /proc/sys/net/ipv4/tcp_keepalive_probes
Bad idea.
> Oh btw. we got what I think is a "bad one" too...
> Feb 12 16:42:35 mcquack kernel: KERNEL: assertion (tp->lost_out == 0) failed
> at tcp_input.c(1202):tcp_remove_reno_sacks
Absolutely harmless. This is debugging message.
Alexey
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parent reply other threads:[~2001-02-12 20:32 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
[parent not found: <HFEDLHHPHHEOBHLNPJOKMEHECAAA.magnus.walldal@b-linc.com>]
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