Text 148, 74 rader
Skriven 2006-06-12 17:45:54 av Peter Knapper (3:772/1.10)
    Kommentar till text 146 av Mike Powell (1:2320/105.0)
Ärende: Speeding Up OS/2 on a Slo
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Hi Mike,

> What format is your OS/2 Boot drive (FAT or HPFS)?

 MP> FAT

OUCH... OUCH and in case you didnt get that OUCH!!! Installing OS/2 to a FAT
drive really limits things that you can do under OS/2 and performance WILL
degrade seriously over time. Run.. don't walk... and figure out how you can get
OS/2 onto an HPFS drive ASAP.


> How large is the Swap file partition?
> What is your Swap files initial size?

 MP> Both 2048k.  I am guessing that isn't big enough.

The initial/default size of the SWAP file is 2048K and if you don't change that
setting and it never goes above that value then no swap file is being used, so
moving it is moot. 

The OS/2 SWAP file use is completely different to Windows and *nix systems swap
files, treat it like a normal file that performs best when its in ONE
allocation unit (near impossible to attain on a FAT drive).

> is the Swap file partition HPFS or FAT?

 MP> FAT.  Would it do better on HPFS?

YES... HEAPS better... but only if its being used... whic it sounds like its
not...

> How BIG does your Swap file get at its largest size?

 MP> I am not sure on the first one, but it is never over 2048k.

As above, if it never goes above 2048K then your system is not swapping.

I use a utlity called MEMSIZE (MemSz400.Zip Hobbes) to continuously monitor the
size of my Swap file (and other things), it is invaluable to understanding your
system.


> It can also help to TUNE the swap file...

 MP> How does one TUNE the file?

By knowing what your system is doing........;-) If your swap file starts out at
2048K, and after say 6 hours normal use of the machine it sits around 30MB,
then I would set the Swap File INITIAL value (see online help for Swap file) to
32MB. This ensures the swap file is CONTIGUOUS (unfragmented), reduces HD head
movement and and saves the system from having to locate disk space when it
needs it in a hurry.

However if your system has plenty of memory free and NEVER swaps, then you can
improve things by turning off swapping completely, but that can be deadly if
things go wrong. I never fill up my 384MB RAM and leave my Swap at 2048K.

 MP> Thanks for the alert on the SF files, btw!!!


> If your system is swapping then yes, but only if your 
 MP> system is swapping.

 MP> I suspect that it is when FF is running.

FF & Mozz have KNOWN issues when runing on FAT partitions, I strongly urge you
to swap to HPFS ASAP.

Cheers..............pk.


--- Maximus/2 3.01
 * Origin: Another Good Point About OS/2 (3:772/1.10)