Swap space with 12G memory

[Smith, Albert]

Compelling argument. But the more aggressive the application the more intensive it becomes. IE.

Oracle vs. MySQL - Oracle is heavly memory intensive were MySQL is not.
BIND vs QIP - BIND uses very little resources where QIP is a hog every where you look.

Albert Smith 
Sr. Unix Systems Administrator
HPCSA, RHCT
 Genex Services 
440 E. Swedesford Rd. 
Wayne, PA 19087 
albert.smith at genexservices.com 
(610) 964-5154



-----Original Message-----
From: redhat-list-bounces at redhat.com on behalf of James Cooley
Sent: Wed 3/16/2005 7:41 PM
To: General Red Hat Linux discussion list
Subject: RE: Swap space with 12G memory
 
Depending on the situation, you could also argue that you don't want to
deny your services to clients when memory just so happens to be heavily
utilized.  In that case you'd have more swap than you ever think you'll
use, especially since disk space is relatively cheap.

Of course, there are some systems that are so under-utilized ram-wise,
that physical memory will never be filled in the first place.

--James Cooley


> I'd probably add no more than 2GB of swap.
> If your app is that memory bound you don't want to get into situation
> where it actually needs the swap.
>
> -T
>
>> -----Original Message-----
>> From: redhat-list-bounces at redhat.com [mailto:redhat-list-
>> bounces at redhat.com] On Behalf Of Patricio Bruna V
>> Sent: Wednesday, March 16, 2005 4:26 PM
>> To: General Red Hat Linux discussion list
>> Subject: RE: Swap space with 12G memory
>>
>>
>> > > What is the swap space recommended for
>> > > RH Enterprise 3 for 12G of memory. Currently we are using 4G.
>> > >
>> > > The app is an LSAP system > 6G of data,
>> > >
>> > > JYard
>> > > UCLA
>>
>> > The Rule of Thumb is normaly 1.5 - 2 times the physical amount of
> ram.
>> that its was they tall you
>> > So in your case 18 - 24g of swap.
>> Thats its very stupid.
>> why waste so much disk in something not worthy?
>> I always says if you have a lot of RAM because you need it (Big DB)
> and
>> you start to use to much swap (>512) better buy more RAM.
>> > I would check to see if your app requires that much ram.
>> as far as i know, there is not such thing like "much ram".
>>
>> saludos.
>> --
>> Patricio Bruna
>> pbruna at linuxcenterla.com
>> Red Hat Certified Engineer
>> Jefe Soporte y Operaciones LinuxCenter S.A.
>> Canada 239, 5to piso, Providencia, Chile
>> http://www.linuxcenterla.com +56-2-2745000
>>
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