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Available Memory showing as less size than the total memory detected in windows 2003 Standard Edition 64 Bit OS

Answers

  • Hi,

    Based on my knowledge, the total physical memory is the total amount of physical memory available to Windows. The available physical memory includes all physical memory which is immediately available for use by applications. It is equal to the sum of the standby pages, the free pages and the zero page lists. The System Cache is equal to the sum of the system working set, standby list, and modified page list.

    Since a paging file is an area on the hard disk that Windows uses as if it were RAM. If your actual physical memory is 32GB, you have configured paging file size for drives, the total physical memory will increase a value of paging file size in Task Manager.

    According to your performance page, the total physical is almost equal to the sum of PF Usage, Available physical memory and System Cache.

    More information:

    What is the Page File for anyway?

    http://blogs.technet.com/b/askperf/archive/2007/12/14/what-is-the-page-file-for-anyway.aspx

    How to determine the appropriate page file size for 64-bit versions of Windows

    http://support.microsoft.com/kb/889654

    Best regards,

    Susie Long

    Thursday, September 12, 2013 3:27 PM
    Moderator

All replies

  • Hi,

    Based on my knowledge, the total physical memory is the total amount of physical memory available to Windows. The available physical memory includes all physical memory which is immediately available for use by applications. It is equal to the sum of the standby pages, the free pages and the zero page lists. The System Cache is equal to the sum of the system working set, standby list, and modified page list.

    Since a paging file is an area on the hard disk that Windows uses as if it were RAM. If your actual physical memory is 32GB, you have configured paging file size for drives, the total physical memory will increase a value of paging file size in Task Manager.

    According to your performance page, the total physical is almost equal to the sum of PF Usage, Available physical memory and System Cache.

    More information:

    What is the Page File for anyway?

    http://blogs.technet.com/b/askperf/archive/2007/12/14/what-is-the-page-file-for-anyway.aspx

    How to determine the appropriate page file size for 64-bit versions of Windows

    http://support.microsoft.com/kb/889654

    Best regards,

    Susie Long

    Thursday, September 12, 2013 3:27 PM
    Moderator
  • Hi Susie Long,

    Thanks for replying for my Post. Sorry still i got confused on some parameters that,

    1) My total Memory installed in Server is 32 GB. The same have been shown in the Task Manager. So its confirmed that there is no problem in Physical Hardware (Memory Module) because Inside OS full memory size is detecting.

    2) Here my confusion is, does PF Usage is the total usage of the Physical RAM and the Page File? Please correct me if i'm wrong.

    3) Also how to determine Free Memory size available in Physical Memory. Here it shows that Available is ~ 4.5 GB & System Cache is ~ 4.16 GB. so totally ~9 GB can be used by the server.

    Please help me how to identify the following parameters,

    Total Physical Memory (RAM) Used by the Server

    Total Free space available (RAM)

    Thanks in Advance


    -$aran-

    Thursday, September 19, 2013 7:44 AM