Slow disk I/O - was Re: Seeking Help [Ubuntu Bug??]

[geoff at thebakershome.net]

I took a couple of days to backup all of my data and repartition my
drives. I then installed 12.04 onto my 1 TB platter drive. It took only 12
minutes (far faster than 12.10 on the SSD which was 6 hours).

I rebooted into 12.04 and did an "apt-get"

Fetched 1,001 kB in 4s (231 kB/s)
Reading package lists... Done

real	0m6.918s
user	0m1.824s
sys	0m0.128s


It appears to me that there is a bug in Ubuntu 12.10 that was not present
in 12.04.

That same command in 12.10 takes 20 minutes.

Anyone have any advice about what I should do next?

I have 12.10 all setup the way I like, is there an easy way to move all
that data to 12.04?


> I do not know for sure. I get good benchmark sppeds in 12.10 as well. The
> problem is when dealing with lots of small files (apt-get update,
> compiling many files, etc).
>
> I do not know how to properly test this from the live 12.04 disk.
>
> I moved some data around on the hard drives overnight. Tonight I plan to
> install 12.04 onto one of the platter drives. This should allow me to to a
> proper test of the same commands (apt-get update) and better compare the
> performance.
>
>>> I booted the 12.04 Ubuntu live disc and recorded some data.
>>>
>>> Disk Utility:
>>>   All drives are detected as connected via SATA
>>>     SSD Benchmark Results:
>>>       Min Read Rate: 556.4 Mb/s
>>>       Max Read Rate: 565.6 Mb/s
>>>       Average Read Rate: 564.0 Mb/s
>>>       Average Access Time: 0.1 ms
>>
>> Those are excellent results. So, are you saying the main issue is with
>> the
>> version of Ubuntu? That 12.04 works well, and 12.10 does not?
>>
>>
>>
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