[CentOS] Swap: typical rehash. Why?

[Chris Mauritz]

Les Mikesell wrote:
> On Mon, 2006-06-05 at 17:00 -0400, William L. Maltby wrote:
>   
>> I can't resist. Read the thread that was pointed to on lkml. ROTFLMAO.
>>
>> *Real* UNIX addressed these problems long ago. I guess the "Gurus"
>> suffer from NIH (Not Invented Here) syndrome.
>>
>> Given a "general purpose" system, tunability is a must. UNIX, as
>> delivered by USL in such examples as Sys V, had tunables that let admins
>> tune to their needs. A single "swappiness" value is woefully inadequate.
>>     
>
> Actually, having these computed dynamically is much better than
> having to manually tune them every time your mix of programs
> change or you add memory except in some very unusual circumstances
> like a server that does a single job forever.  In the general
> case consider whether you'd rather hire an expert admin to
> keep your system tuned or buy an extra gig of ram and let the
> OS figure out how to use it.
>   


Well, technology marches on.  These days, it's extremely cheap to throw 
hardware at the problem.  It really wasn't that long ago that a gig of 
RAM would have cost a month or two (or more) of a typical admin's 
salary.  :-)

Cheers,