[K12OSN] Re: Performance issue and question - more information on server

[Liam Marshall]

Dean Weiten wrote:

>Folks have repeatedly asked how much RAM is in the server.  Sorry, but I
>don't monitor the mailing list constantly...
>
>We have two servers, identical hardware, sharing the outside backbone.  They
>both have the same symptoms.
>
>    RAM is 2 Gb
>
>    HDD is Western Digital WD400JB-00FMA0 (according to dmesg)
>
>  
>
one big problem could be the hard drive.  Even EIDE is going to be 
slower accessing files than scsi.  Any number of users over 5-10 and you 
will notice serious problems with performance.

>>>One possible concern is that /home is mounted through NFS (100Base
>>>      
>>>
>switched on the outside backbone), although of course /root is always local,
>and the problem occurs just as badly for root...
>
>  
>
>>>I used "top" to see if I am ever into swap, and I never am even close.  I
>>>      
>>>
>haven't tried running "top" while the program is launching to diagnose what
>is happening, but I will do so when I get a chance.
>
>  
>
>>>Some time ago, I tried both non-SMP and SMP kernels, and decided they
>>>      
>>>
>made no difference I could see.  Right now it is 2.4.22-1.2199.nptlsmp,
>which is SMP and therefore uses "hyperthreading".
>
>  
>
>>>I had a look at /tmp and saw lots of files in there.  It is a dangerous
>>>      
>>>
>game to delete them, but it's late at night on a Friday, so I held my nose
>and deleted them.  I won't have a chance to try to see if it makes any
>difference, but perhaps tomorrow when I am down at the school...
>
>
>I am a volunteer, not an employee, so I work there when I get time and am
>close by.  I'll check out some of the other ideas in the coming week.
>
>Dean.
>
>
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>  
>