Virtual memory

R

Rlange

I keep getting a "low on virtual memory" warning box with
the explanation that my paging file is being increased.
For several days, my computer has been practically inop
erable because of this problem. I have 512 MB RAM and 80
gig hard drive. I can't find a good reason why I should
have this problem (plenty of space, disk is defragmented,
and viruses have been checked for). Any ideas?
 
B

Babuji CCNA

Hi,

When your computer is running low on Random Access Memory
(RAM) and additional RAM is immediately required by the
system, Windows uses hard drive space to simulate system
RAM. This is known as virtual memory and is often called
the paging file.

To change the size of the virtual memory paging file to
avoid this error and improve the system performance,
follow these steps:

NOTE: You must be logged on as an administrator or a
member of the Administrators group in order to complete
this procedure. If your computer is connected to a
network, network policy settings may also prevent you from
completing this procedure.

1. Click Start, click Control Panel, click Performance and
Maintenance, and then click System.

2. Click the Advanced tab and then click Settings under
Performance.

3. Click the Advanced tab and then click Change under
Virtual memory.

4. Under Drive [Volume Label], click the drive that
contains the paging file you want to change.

5. Under Paging file size for the selected drive, click
Custom size, enter the new paging file size in megabytes
(MB) in the Initial size (MB) or Maximum size (MB) field,
and then click Set .

If you decrease the size of either the initial or maximum
paging file settings, you must restart your computer to
see the effects of the changes made. However, when you
increase the paging file size, you need not restart your
computer.

NOTE:

* To enable Windows to choose the best paging file size,
click System managed size . The recommended minimum size
is equivalent to 1.5 times the size of RAM on your system,
and three times that figure for the maximum size. For
example, if you have 256MB of RAM, the minimum size would
be 384MB and the maximum size would be 1152MB.
* For best system performance, do not set the initial size
to less than the minimum recommended size under Total
paging file size for all drives. Generally, you should
leave the paging file at its recommended size, although
you might increase its size if you routinely use programs
that require a lot of memory space.

To optimize memory usage, follow these steps:

1. Click Start, click Control Panel, click Performance and
Maintenance, and then click System.

2. Click the Advanced tab and then click Settings under
Performance.

3. Click the Advanced tab.

4. Perform any one of the following steps:

* If you use your computer primarily as a workstation than
as a server, click Programs to devote more memory to the
programs. The programs will work faster and your system
cache size will be the default size.
* If you use your computer primarily as a server or if you
use programs that require a larger cache, slick System
cache.

The system performance can thus be improved by managing
computer's memory and solve the virtual memory errors.

Thanks,

Babuji CCNA
 
R

Ron Martell

* To enable Windows to choose the best paging file size,
click System managed size . The recommended minimum size
is equivalent to 1.5 times the size of RAM on your system,
and three times that figure for the maximum size. For
example, if you have 256MB of RAM, the minimum size would
be 384MB and the maximum size would be 1152MB.

That advice is incorrect.

The page file exists so as to compensate for the *lack* of sufficient
RAM in the computer to satisfy the total memory requirements.

More RAM means less page file and less RAM means more page file,
provided all other factors are held constant.

Recommendations that the page file should be some multiple of the
amount of RAM only serve to illustrate that the author of them does
not really understand the principles of memory management in Windows
XP.



Ron Martell Duncan B.C. Canada
--
Microsoft MVP
On-Line Help Computer Service
http://onlinehelp.bc.ca

"The reason computer chips are so small is computers don't eat much."
 
R

Ron Martell

Rlange said:
I keep getting a "low on virtual memory" warning box with
the explanation that my paging file is being increased.
For several days, my computer has been practically inop
erable because of this problem. I have 512 MB RAM and 80
gig hard drive. I can't find a good reason why I should
have this problem (plenty of space, disk is defragmented,
and viruses have been checked for). Any ideas?

See MVP Alex Nichol's article on virtual memory in Windows XP at
http://aumha.org/win5/a/xpvm.htm especially the section dealing with
problems.

Good luck



Ron Martell Duncan B.C. Canada
--
Microsoft MVP
On-Line Help Computer Service
http://onlinehelp.bc.ca

"The reason computer chips are so small is computers don't eat much."
 

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