Re: Re:

[Robert I. <cor...@gm...>]

Hi,

On Mon, Mar 21, 2011 at 10:22 AM, CHOO Chee Wei [MY] <
che...@vo...> wrote:

> Hi Dave,
>
> I've actually tune it accordingly from this website
> http://curl-loader.sourceforge.net/doc/faq.html#big-load
>
> ulimit -n 100000
> sysctl -w tcp_tw_recycle=1
> sysctl -w net.ipv4.tcp_tw_recycle=1
> sysctl -w net.ipv4.tcp_tw_reuse=1
> sysctl -w fs.file-max=100000
> sysctl -w net.ipv4.conf.all.arp_filter=0
> sysctl -w net.ipv4.conf.all.rp_filter=0
> sysctl -w net.ipv4.conf.eth2.rp_filter=0
> sysctl -w net.core.rmem_max=16777216
> sysctl -w net.core.wmem_max=16777216
> sysctl -w net.ipv4.tcp_rmem="4096 87380 16777216"
> sysctl -w net.ipv4.tcp_wmem="4096 87380 16777216"
> sysctl -w net.ipv4.tcp_mem="16777216 16777216 16777216"
> echo 1024000 > /proc/sys/net/ipv4/neigh/default/gc_thresh1
> echo 1024000 > /proc/sys/net/ipv4/neigh/default/gc_thresh2
> echo 1024000 > /proc/sys/net/ipv4/neigh/default/gc_thresh3
>
> I manage to get the link usage to around 800mbps but after 5 minutes, the
> link usage drops to around 200mbps. Any clues to where should I look into?
> Also whenever I tried to use the -t switch, it gives out segmentation
> error. I tried it with -t 4 and get the same segmentation error.
>
> main - RUNNING LOAD, STARTING THREADS
>
> create_thr_subbatches - error: subbatches should deal either with a single
> shared IP or with at least a single shared IP per subbatch
> main - note: Thread 0, started normally
> main - note: Thread 1, started normally
> Segmentation fault
>
> Regards,
>
> Chee Wei
>
>

With shared IPs you cannot use -t option.

Please, look at your server-side. From this point see, that your
server/servers are good with the load. Yet another place to look is a
potential network bottleneck.

-- 
Regards,
Robert Iakobashvili, Ph.D.

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