Bo Nielsen skrev:
> Ville systemet blive hurtigere hvis jeg droppede pagefilere helt,
> og kun brugte min fysiske hukommelse (1024MB)
Nej. Faktisk så vil du spilde meget RAM hvis du kører helt uden
sidefil.
Hvorfor du spilder RAM ved at køre uden sidefil kan du bla. læse
her: <
http://aumha.org/win5/a/xpvm.php?>
Citat fra siden:
| What are Page Faults?
| Only those parts of the program and data that are currently in
| active use need to be held in physical RAM. Other parts are then
| held in a swap file (as it´s called in Windows 95/98/ME) or page
| file (in Windows NT versions including Windows 2000 and XP). When
| a program tries to access some address that is not currently in
| physical RAM, it generates an interrupt, called a Page Fault...
Ovenstående beviser at en sidefil/swapfil ikke kun bliver brugt
når systemet løber tør for ægte RAM, som mange stadig går og tror.
Den bliver også brugt til at indeholde programdata som ikke er i
brug lige pt. og derfor heller ikke behøver at befinde sig i RAM.
| ...This asks the system to retrieve the 4 KB page containing the
| address from the page file (or in the case of code possibly from
| the original program file). This - a valid page fault - normally
| happens quite invisibly.
og:
| Can the Virtual Memory be turned off on a really large machine?
| Strictly speaking Virtual Memory is always in operation and cannot
| be "turned off." What is meant by such wording is "set the system
| to use no page file space at all."
|
| Doing this would waste a lot of the RAM. The reason is that when
| programs ask for an allocation of Virtual memory space, they may
| ask for a great deal more than they ever actually bring into use
| the total may easily run to hundreds of megabytes. These addresses
| have to be assigned to somewhere by the system. If there is a page
| file available, the system can assign them to it if there is not,
| they have to be assigned to RAM, locking it out from any actual
| use.
Jeg kan f.eks. se at min sidefil pt. indeholder omkring 300 MB data
som er swappet ud på disken og ligger klar til at blive hentet ind
i RAM når der er brug for det. Hvis jeg kørte uden sidefil så ville
de 300 MB blive reserveret i RAM i stedet, hvilket vil resultere i
at jeg ville have 300 MB RAM mindre at gøre godt med.
--
Med venlig hilsen
Madsen.