[K12OSN] How to DRASTICALLY speed up app response on K12LTSP

["Terrell Prudé Jr."]

Robert Arkiletian wrote:
> On 10/5/07, "Terrell Prudé Jr." <microman at cmosnetworks.com> wrote:
>   
>>  I just ran across this today over at www.linuxtoday.com.  I tried out the
>> following two settings on my K12LTSP 4.2EL box to see if they would indeed
>> speed up response time for desktop apps.
>>
>>  /sbin/sysctl -w vm.swappiness=1    (default is 60)
>>  /sbin/sysctl -w vm.vfs_cache_pressure=50   (default is 100)
>>
>>  These are, as you might've guessed from the "vm" in the name, virtual
>> memory settings for Linux (the kernel).
>>
>>     
>
> Will both these changes only make a difference if your server is
> actively using swap? IOW if you never hit swap, do they matter?
>
>   

My server at home doesn't swap.  However, I still notice a remarkable
increase in app response time.  Now, on a busy LTSP server with, say, 40
users, it'd probably benefit even more.

--TP
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