slow transfers on webshare service

[Nikolay Pavlov]

On Wednesday 19 September 2007 20:57:59 Miroslav Lachman wrote:
> Ivan Voras wrote:
> > Miroslav Lachman wrote:
> >>I am running Lighttpd for about 2 years on download server. With 1
> >>worker, lighttpd seems limited to 110Mbps. After change to 4 workers
> >>throughput increase to about 190Mbps serving 250-400 clients. (daily
> >>traffic is ~750GB)
> >
> > Ok. Can you run iostat during peak traffic and report its output? So
> > we rule out disk drives.
>
> I have external disk array (da1) which is saturated at this time:
>
> # iostat -w 5
>        tty             da0              da1            pass0            
> cpu tin tout  KB/t tps  MB/s   KB/t tps  MB/s   KB/t tps  MB/s  us ni sy
> in id 0    1 12.91   3  0.04  59.30  95  5.47   0.00   0  0.00   4  0 24
> 21 51 0   92  2.00   1  0.00  59.28 251 14.51   0.00   0  0.00   1  0  5
>  5 89 0   31 10.67   1  0.01  59.03 226 13.03   0.00   0  0.00   0  0  5
>  5 90 0   31 17.74  17  0.29  58.80 231 13.29   0.00   0  0.00   0  0  4
>  4 92 0   31  0.00   0  0.00  58.39 222 12.67   0.00   0  0.00   1  0  5
>  4 90
>
> from systat -vmstat
>
> Disks   da0   da1 pass0 pass1 pass2
> KB/t   0.00 59.53  0.00  0.00  0.00
> tps       0   226     0     0     0
> MB/s   0.00 13.14  0.00  0.00  0.00
> % busy    0    97     0     0     0
>
> But without 4 workers a can't saturate array and traffic graph (by MRTG)
> will be limited on fixed bandwidth.
> So setting Lighttpd to use 4 workers definitely help in my case. (I
> don't know if it is same for Miroslav Valenta)
>
> Miroslav Lachman
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Is there any reason to do not use sendfile as it is in your lighttpd 
config?

-- 
======================================================================  
- Best regards, Nikolay Pavlov. <<<-----------------------------------    
======================================================================  

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