[ale] Disk performance

[Alex Carver]

On 8/24/2013 16:48, Alex Carver wrote:
> # hdparm -Tt /dev/sda
>
> /dev/sda:
>   Timing cached reads:   330 MB in  2.00 seconds = 164.89 MB/sec
>   Timing buffered disk reads:  38 MB in  3.13 seconds =  12.16 MB/sec
>
> But I think I found the culprit, the CD drive blew up.  I almost never
> use it (last time I used it was for the installation three years ago).
> I rebooted once after I sent the initial email to see what POST said and
> it never announced the CD drive -- it's IDE but it was on the secondary
> channel.  So I shut back down and yanked it off the bus.  Left
> everything else as it was with the exception of removing the suspend
> feature from the kernel (kept hanging for 20-30 seconds running
> libgcrypt at boot to uncompress a non-existent suspend file).
>
> I'm going to give it a few hours and see if it behaves or goes back to
> the lagging.  I'll also be watching the free RAM very closely.  Prior to
> the shutdown it was running with about 20MB free and now it's up at
> 390MB free (total system 512MB).

Well, looks like mostly still working although it has a memory leak 
somewhere.  The free memory (according to top) is slowly dropping.  It 
went from 380MB to 365MB in about two hours so 15MB went somewhere 
during that time.  Probably one of the cron jobs or apache, just don't 
know which yet.