Re: Best OS & Configuration for Dual Xeon w/4GB &

From: Mark Kirkwood
Subject: Re: Best OS & Configuration for Dual Xeon w/4GB &
Date: ,
Msg-id: 441F7847.5000406@paradise.net.nz
(view: Whole thread, Raw)
In response to: Re: Best OS & Configuration for Dual Xeon w/4GB &  (Mark Kirkwood)
Responses: Re: Best OS & Configuration for Dual Xeon w/4GB &  ("Jim C. Nasby")
List: pgsql-performance

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Best OS & Configuration for Dual Xeon w/4GB & Adaptec RAID 2200S  (Kenji Morishige, )
 Re: Best OS & Configuration for Dual Xeon w/4GB &  (Scott Marlowe, )
  Re: Best OS & Configuration for Dual Xeon w/4GB &  (Mark Kirkwood, )
  Re: Best OS & Configuration for Dual Xeon w/4GB &  ("Jim C. Nasby", )
   Re: Best OS & Configuration for Dual Xeon w/4GB &  (Scott Marlowe, )
    Re: Best OS & Configuration for Dual Xeon w/4GB &  (Mark Kirkwood, )
     Re: Best OS & Configuration for Dual Xeon w/4GB &  (Mark Kirkwood, )
      Re: Best OS & Configuration for Dual Xeon w/4GB &  ("Jim C. Nasby", )
   Re: Best OS & Configuration for Dual Xeon w/4GB &  (Alex Hayward, )
    Re: Best OS & Configuration for Dual Xeon w/4GB &  ("Jim C. Nasby", )
 Re: Best OS & Configuration for Dual Xeon w/4GB & Adaptec RAID 2200S  ("Claus Guttesen", )
  Re: Best OS & Configuration for Dual Xeon w/4GB &  (Scott Marlowe, )
 Re: Best OS & Configuration for Dual Xeon w/4GB & Adaptec RAID 2200S  (Tom Lane, )
 Re: Best OS & Configuration for Dual Xeon w/4GB & Adaptec RAID 2200S  ("Claus Guttesen", )
  Re: Best OS & Configuration for Dual Xeon w/4GB & Adaptec RAID 2200S  (Kenji Morishige, )
   Re: Best OS & Configuration for Dual Xeon w/4GB &  ("Luke Lonergan", )
 Re: Best OS & Configuration for Dual Xeon w/4GB & Adaptec RAID 2200S  (Vivek Khera, )
  Re: Best OS & Configuration for Dual Xeon w/4GB & Adaptec  (Miguel, )
   Re: Best OS & Configuration for Dual Xeon w/4GB &  ("Luke Lonergan", )
    Re: Best OS & Configuration for Dual Xeon w/4GB & Adaptec  (Miguel, )
     Re: Best OS & Configuration for Dual Xeon w/4GB &  ("Luke Lonergan", )
      Re: Best OS & Configuration for Dual Xeon w/4GB & Adaptec  (Miguel, )
       Re: Best OS & Configuration for Dual Xeon w/4GB &  ("Luke Lonergan", )
        Re: Best OS & Configuration for Dual Xeon w/4GB &  (Miguel, )
      Re: Best OS & Configuration for Dual Xeon w/4GB &  ("Jim C. Nasby", )
       Re: Best OS & Configuration for Dual Xeon w/4GB &  ("Luke Lonergan", )
        Re: Best OS & Configuration for Dual Xeon w/4GB &  ("Jim C. Nasby", )
         Re: Best OS & Configuration for Dual Xeon w/4GB &  (Vivek Khera, )
       Re: Best OS & Configuration for Dual Xeon w/4GB &  (Adam Witney, )
        Re: Best OS & Configuration for Dual Xeon w/4GB &  (Mark Kirkwood, )
         Re: Best OS & Configuration for Dual Xeon w/4GB &  (Jeff Frost, )
   Re: Best OS & Configuration for Dual Xeon w/4GB & Adaptec RAID 2200S  (Vivek Khera, )
    Re: Best OS & Configuration for Dual Xeon w/4GB & Adaptec  (Miguel, )
     Re: Best OS & Configuration for Dual Xeon w/4GB & Adaptec RAID 2200S  (Vivek Khera, )
      Re: Best OS & Configuration for Dual Xeon w/4GB & Adaptec  (Miguel, )
   Re: Best OS & Configuration for Dual Xeon w/4GB & Adaptec  (PFC, )
    Re: Best OS & Configuration for Dual Xeon w/4GB & Adaptec  (Vivek Khera, )
     Re: Best OS & Configuration for Dual Xeon w/4GB & Adaptec  (PFC, )
      Re: Best OS & Configuration for Dual Xeon w/4GB & Adaptec  (Vivek Khera, )
  Re: Best OS & Configuration for Dual Xeon w/4GB & Adaptec RAID 2200S  ("Jim C. Nasby", )
   Re: Best OS & Configuration for Dual Xeon w/4GB & Adaptec  (Mark Kirkwood, )
    Re: Best OS & Configuration for Dual Xeon w/4GB & Adaptec  ("Jim C. Nasby", )
     Re: Best OS & Configuration for Dual Xeon w/4GB & Adaptec  (Alex Hayward, )
      Re: Best OS & Configuration for Dual Xeon w/4GB & Adaptec  ("Jim C. Nasby", )
    Re: Best OS & Configuration for Dual Xeon w/4GB & Adaptec  (Vivek Khera, )

Mark Kirkwood wrote:
>
> I think Freebsd 'Inactive' corresponds pretty closely to Linux's
> 'Inactive Dirty'|'Inactive Laundered'|'Inactive Free'.
>

Hmmm - on second thoughts I think I've got that wrong :-(, since in
Linux all the file buffer pages appear in 'Cached' don't they...

(I also notice that 'Inactive Laundered' does not seem to be mentioned
in vanilla - read non-Redhat - 2.6 kernels)

So I think its more correct to say Freebsd 'Inactive' is similar to
Linux 'Inactive' + some|most of Linux 'Cached'.

A good discussion of how the Freebsd vm works is here:

http://www.freebsd.org/doc/en_US.ISO8859-1/books/arch-handbook/vm.html

In particular:

"FreeBSD reserves a limited amount of KVM to hold mappings from struct
bufs, but it should be made clear that this KVM is used solely to hold
mappings and does not limit the ability to cache data."

Cheers

Mark


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From: "Jim C. Nasby"
Date:
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From: Marco Furetto
Date:
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