Re: Abysmal disk performance, how to debug?

[Stephen Clark <Stephen.Clark@seclark.us>]

Sunil Naidu wrote:

> On 1/20/07, Willy Tarreau <w@1wt.eu> wrote:
>  
>
> > It is not expected to increase write performance, but it should help
> > you do something else during that time, or also give more responsiveness
> > to Ctrl-C. It is possible that you have fast and slow RAM, or that your
> > video card uses shared memory which slows down some parts of memory
> > which are not used anymore with those parameters.
> >    
>
> I did test some SATA drives, am getting these value for 2.6.20-rc5:-
>
> [sukhoi@Typhoon ~]$ time dd if=/dev/zero of=/tmp/1GB bs=1M count=1024
> 1024+0 records in
> 1024+0 records out
> 1073741824 bytes (1.1 GB) copied, 21.0962 seconds, 50.9 MB/s
>
> What can you suggest here w.r.t my RAM & disk?
>
>  
>
> > Willy
> >    
>
> Thanks,
>
> ~Akula2
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>  
Hi,
whitebook vbi s96f core 2 duo t5600 2gb hitachi ATA      HTS721060G9AT00 
using libata
time dd if=/dev/zero of=/tmp/1GB bs=1M count=1024
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB) copied, 10.0092 seconds, 107 MB/s

real    0m10.196s
user    0m0.004s
sys     0m3.440s


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