From: Andi Kleen <ak@muc.de>
To: Simon Kirby <sim@netnation.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Awfully slow /proc/net/tcp, netstat, in.identd in 2.4 (updated)
Date: 19 Oct 2001 20:22:21 +0200 [thread overview]
Message-ID: <k23d4fwkv6.fsf@zero.aec.at> (raw)
In-Reply-To: <20011018094222.A31919@netnation.com> <20011019145750.A22193@zero.firstfloor.org> <20011019085944.A16467@netnation.com>
In-Reply-To: Simon Kirby's message of "Fri, 19 Oct 2001 08:59:44 -0700"
In article <20011019085944.A16467@netnation.com>,
Simon Kirby <sim@netnation.com> writes:
> TCP: Hash tables configured (established 262144 bind 65536)
No it means you have 512+k buckets (*4 on UP; *8 on SMP for bytes = ~4MB)
for the established hash and 64k for the bind hash (the later is only
used internally and searched for netstat).
4MB for a hash table looks ridiculously large to me.
> ...but shrinking the size slightly won't really fix the problem, it will
> just make it less obvious.
the size is the problem. walking an 4MB table will be always slow.
-Andi
next prev parent reply other threads:[~2001-10-19 18:22 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-10-18 16:42 Awfully slow /proc/net/tcp, netstat, in.identd in 2.4 (updated) Simon Kirby
2001-10-18 16:49 ` David S. Miller
2001-10-18 17:05 ` Simon Kirby
2001-10-19 12:57 ` Andi Kleen
2001-10-19 15:59 ` Simon Kirby
2001-10-19 18:22 ` Andi Kleen [this message]
2001-10-19 20:59 ` David S. Miller
2001-10-19 21:30 ` Benjamin LaHaise
2001-10-19 21:56 ` David S. Miller
2001-10-19 22:04 ` Benjamin LaHaise
2001-10-19 22:11 ` David S. Miller
2001-10-19 22:13 ` Benjamin LaHaise
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