Daniel Drake wrote:
Hi,
Since sometime after 2.6.16, some websites have been very slow to load.
Examples include:
http://zd1211.ath.cx
http://developer.osdl.org/shemminger/blog/
http://www.reactivated.net/weblog
On a good kernel, "wget http://zd1211.ath.cx"; says:
20:23:38 (90.44 KB/s) - `index.html' saved [20895/20895]
On a bad kernel:
20:14:18 (327.01 B/s) - `index.html' saved [20895/20895]
I reproduced this on two different internet connections (same ISP
though). However I cannot reproduce it on my other system.
git-bisect tracked it down to:
7b4f4b5ebceab67ce440a61081a69f0265e17c2a is first bad commit
diff-tree 7b4f4b5ebceab67ce440a61081a69f0265e17c2a (from
2babf9daae4a3561f3264638a22ac7d0b14a6f52)
Author: John Heffner <[email protected]>
Date: Sat Mar 25 01:34:07 2006 -0800
[TCP]: Set default max buffers from memory pool size
Indeed, reverting this patch from 2.6.17-rc1-git4 allows those sites to
load again.
Any ideas?
I'm not seeing this behavior myself. What are the values of
/proc/sys/net/ipv4/tcp_wmem, tcp_rmem, and tcp_mem? How much memory
does this system have? (A binary tcpdump might be good, too.)
Thanks,
-John
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