Server 2008 R2 Memory Usage

We have 10 Server 2008 R2 servers all exhibiting the same behaviour.
The servers run at almost 100% memory utilization.  Only one has had SP1 installed, which I did this morning and after about 1 hour, the memory is maxed out.  The server initially had 14GB memory, but after installing SP1 and seeing more of the
same, I decided to try installing more RAM.  I put in another 8GB, and while it takes a little longer to bottom out, it still bottoms out.  Perfmon is showing less than 100MB of available memory, and, as expected, performance is not good.
These servers are strictly file servers.  We work with images of hard drives.  They are split into 2GB chunks.  An easy way to replicate the issue is to load a hard drive image and do a re-acquisition.  We do this sometimes as a drive
may be acquired in the field without compression, and we will re-acquire it with compression.  Once this process is started, in about 1 hour, I have about 100MB free memory. 
Using RamMap,  Mapped File is using 21GB of memory.  When I look at the file summary, the server is caching the 2GB image files and not letting go of them in a timely manner.  I am the _only_ person accessing this server, it just gets worse
when more are.
As noted above, performance is terrible, is this supposed to be normal?
Server is an IBM x3550 M2 with dual quad-core CPU, 22GB RAM, OS is on a RAID 1 mirror of two 76GB 15K SAS drives, and the server has two 14TB arrays attached. OS is Windows Server 2008 R2 SP1.  Only the File Server Role is installed.
Thanks,
Brian

Hi,
I would like to confirm that do you have Exchange Server installed on the servers?
If you do have Exchange Server installed, this behavior is normal. Exchange store.exe grabs as much RAM on the server as it can possibly get because
store.exe needs it to optimize performance. For more information, please refer to the following Microsoft TechNet blogs:
Why is Exchange Store.exe so RAM hungry?
http://blogs.technet.com/b/exchange/archive/2004/08/02/206012.aspx
Understanding Exchange 2007 Memory Usage and its use of the Paging File
http://blogs.technet.com/b/exchange/archive/2008/08/06/3406010.aspx
If you do not have Exchange Server installed, please check Task Manager and let us know what application uses the large size of memory. In addition,
you may run Process Explorer to monitor the memory usage. You may download and install it from the following link:
http://technet.microsoft.com/en-us/sysinternals/bb896653.aspx
After that, please let us know the suspect.
Regards,
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    SM Committed                             0
    SinglePage Allocator                     40
    MultiPage Allocator                      0
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    CACHESTORE_NOTIF (node 0)                KB
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    VM Committed                             0
    Locked Pages Allocated                   0
    SM Reserved                              0
    SM Committed                             0
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    CACHESTORE_VIEWDEFINITIONS (node 0)      KB
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    VM Committed                             0
    Locked Pages Allocated                   0
    SM Reserved                              0
    SM Committed                             0
    SinglePage Allocator                     16
    MultiPage Allocator                      0
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    VM Reserved                              0
    VM Committed                             0
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    SM Reserved                              0
    SM Committed                             0
    SinglePage Allocator                     8
    MultiPage Allocator                      0
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    CACHESTORE_XMLDBATTRIBUTE (node 0)       KB
    VM Reserved                              0
    VM Committed                             0
    Locked Pages Allocated                   0
    SM Reserved                              0
    SM Committed                             0
    SinglePage Allocator                     8
    MultiPage Allocator                      0
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    CACHESTORE_STACKFRAMES (node 0)          KB
    VM Reserved                              0
    VM Committed                             0
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    SM Reserved                              0
    SM Committed                             0
    SinglePage Allocator                     0
    MultiPage Allocator                      8
    (7 row(s) affected)
    CACHESTORE_STACKFRAMES (node 64)         KB
    VM Reserved                              0
    VM Committed                             0
    Locked Pages Allocated                   0
    SM Reserved                              0
    SM Committed                             0
    SinglePage Allocator                     0
    MultiPage Allocator                      8
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    CACHESTORE_STACKFRAMES (Total)           KB
    VM Reserved                              0
    VM Committed                             0
    Locked Pages Allocated                   0
    SM Reserved                              0
    SM Committed                             0
    SinglePage Allocator                     0
    MultiPage Allocator                      16
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    VM Reserved                              0
    VM Committed                             0
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    SM Reserved                              0
    SM Committed                             0
    SinglePage Allocator                     48
    MultiPage Allocator                      0
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    CACHESTORE_BROKERKEK (node 0)            KB
    VM Reserved                              0
    VM Committed                             0
    Locked Pages Allocated                   0
    SM Reserved                              0
    SM Committed                             0
    SinglePage Allocator                     8
    MultiPage Allocator                      0
    (7 row(s) affected)
    CACHESTORE_BROKERDSH (node 0)            KB
    VM Reserved                              0
    VM Committed                             0
    Locked Pages Allocated                   0
    SM Reserved                              0
    SM Committed                             0
    SinglePage Allocator                     8
    MultiPage Allocator                      0
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    CACHESTORE_BROKERUSERCERTLOOKUP (node 0) KB
    VM Reserved                              0
    VM Committed                             0
    Locked Pages Allocated                   0
    SM Reserved                              0
    SM Committed                             0
    SinglePage Allocator                     8
    MultiPage Allocator                      0
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    CACHESTORE_BROKERRSB (node 0)            KB
    VM Reserved                              0
    VM Committed                             0
    Locked Pages Allocated                   0
    SM Reserved                              0
    SM Committed                             0
    SinglePage Allocator                     8
    MultiPage Allocator                      0
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    CACHESTORE_BROKERREADONLY (node 0)       KB
    VM Reserved                              0
    VM Committed                             0
    Locked Pages Allocated                   0
    SM Reserved                              0
    SM Committed                             0
    SinglePage Allocator                     32
    MultiPage Allocator                      0
    (7 row(s) affected)
    CACHESTORE_BROKERTO (node 0)             KB
    VM Reserved                              0
    VM Committed                             0
    Locked Pages Allocated                   0
    SM Reserved                              0
    SM Committed                             0
    SinglePage Allocator                     8
    MultiPage Allocator                      0
    (7 row(s) affected)
    CACHESTORE_EVENTS (node 0)               KB
    VM Reserved                              0
    VM Committed                             0
    Locked Pages Allocated                   0
    SM Reserved                              0
    SM Committed                             0
    SinglePage Allocator                     16
    MultiPage Allocator                      0
    (7 row(s) affected)
    CACHESTORE_CLRPROC (node 0)              KB
    VM Reserved                              0
    VM Committed                             0
    Locked Pages Allocated                   0
    SM Reserved                              0
    SM Committed                             0
    SinglePage Allocator                     40
    MultiPage Allocator                      0
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    CACHESTORE_SYSTEMROWSET (node 0)         KB
    VM Reserved                              0
    VM Committed                             0
    Locked Pages Allocated                   0
    SM Reserved                              0
    SM Committed                             0
    SinglePage Allocator                     1856
    MultiPage Allocator                      0
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    CACHESTORE_CONVPRI (node 0)              KB
    VM Reserved                              0
    VM Committed                             0
    Locked Pages Allocated                   0
    SM Reserved                              0
    SM Committed                             0
    SinglePage Allocator                     48
    MultiPage Allocator                      0
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    CACHESTORE_FULLTEXTSTOPLIST (node 0)     KB
    VM Reserved                              0
    VM Committed                             0
    Locked Pages Allocated                   0
    SM Reserved                              0
    SM Committed                             0
    SinglePage Allocator                     32
    MultiPage Allocator                      0
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    USERSTORE_SCHEMAMGR (node 0)             KB
    VM Reserved                              0
    VM Committed                             0
    Locked Pages Allocated                   0
    SM Reserved                              0
    SM Committed                             0
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    VM Committed                             0
    Locked Pages Allocated                   0
    SM Reserved                              0
    SM Committed                             0
    SinglePage Allocator                     5592
    MultiPage Allocator                      0
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    USERSTORE_TOKENPERM (node 0)             KB
    VM Reserved                              0
    VM Committed                             0
    Locked Pages Allocated                   0
    SM Reserved                              0
    SM Committed                             0
    SinglePage Allocator                     3856
    MultiPage Allocator                      3960
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    USERSTORE_OBJPERM (node 0)               KB
    VM Reserved                              0
    VM Committed                             0
    Locked Pages Allocated                   0
    SM Reserved                              0
    SM Committed                             0
    SinglePage Allocator                     2328
    MultiPage Allocator                      0
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    USERSTORE_SXC (node 0)                   KB
    VM Reserved                              0
    VM Committed                             0
    Locked Pages Allocated                   0
    SM Reserved                              0
    SM Committed                             0
    SinglePage Allocator                     656
    MultiPage Allocator                      0
    (7 row(s) affected)
    USERSTORE_SXC (node 64)                  KB
    VM Reserved                              0
    VM Committed                             0
    Locked Pages Allocated                   0
    SM Reserved                              0
    SM Committed                             0
    SinglePage Allocator                     8
    MultiPage Allocator                      0
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    USERSTORE_SXC (Total)                    KB
    VM Reserved                              0
    VM Committed                             0
    Locked Pages Allocated                   0
    SM Reserved                              0
    SM Committed                             0
    SinglePage Allocator                     664
    MultiPage Allocator                      0
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    OBJECTSTORE_LBSS (node 0)                KB
    VM Reserved                              0
    VM Committed                             0
    Locked Pages Allocated                   0
    SM Reserved                              0
    SM Committed                             0
    SinglePage Allocator                     128
    MultiPage Allocator                      608
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    OBJECTSTORE_SNI_PACKET (node 0)          KB
    VM Reserved                              0
    VM Committed                             0
    Locked Pages Allocated                   0
    SM Reserved                              0
    SM Committed                             0
    SinglePage Allocator                     2008
    MultiPage Allocator                      56
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    VM Reserved                              0
    VM Committed                             0
    Locked Pages Allocated                   0
    SM Reserved                              0
    SM Committed                             0
    SinglePage Allocator                     0
    MultiPage Allocator                      56
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    VM Reserved                              0
    VM Committed                             0
    Locked Pages Allocated                   0
    SM Reserved                              0
    SM Committed                             0
    SinglePage Allocator                     2008
    MultiPage Allocator                      112
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    OBJECTSTORE_SERVICE_BROKER (node 0)      KB
    VM Reserved                              0
    VM Committed                             0
    Locked Pages Allocated                   0
    SM Reserved                              0
    SM Committed                             0
    SinglePage Allocator                     424
    MultiPage Allocator                      0
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    OBJECTSTORE_LOCK_MANAGER (node 0)        KB
    VM Reserved                              32768
    VM Committed                             32768
    Locked Pages Allocated                   0
    SM Reserved                              0
    SM Committed                             0
    SinglePage Allocator                     4048
    MultiPage Allocator                      0
    (7 row(s) affected)
    OBJECTSTORE_LOCK_MANAGER (node 64)       KB
    VM Reserved                              0
    VM Committed                             0
    Locked Pages Allocated                   0
    SM Reserved                              0
    SM Committed                             0
    SinglePage Allocator                     24
    MultiPage Allocator                      0
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    OBJECTSTORE_LOCK_MANAGER (Total)         KB
    VM Reserved                              32768
    VM Committed                             32768
    Locked Pages Allocated                   0
    SM Reserved                              0
    SM Committed                             0
    SinglePage Allocator                     4072
    MultiPage Allocator                      0
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    Committed                                1024000
    Target                                   1024000
    Database                                 793462
    Dirty                                    36258
    In IO                                    0
    Latched                                  0
    Free                                     171398
    Stolen                                   59140
    Reserved                                 0
    Visible                                  1024000
    Stolen Potential                         913660
    Limiting Factor                          17
    Last OOM Factor                          0
    Last OS Error                            0
    Page Life Expectancy                     262733
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    Process/System Counts                    Value
    Available Physical Memory                69021696
    Available Virtual Memory                 8762135273472
    Available Paging File                    12716019712
    Working Set                              15196917760
    Percent of Committed Memory in WS        100
    Page Faults                              897824874
    System physical memory high              0
    System physical memory low               0
    Process physical memory low              0
    Process virtual memory low               0
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    Procedure Cache                          Value
    TotalProcs                               4573
    TotalPages                               53712
    InUsePages                               27
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    Global Memory Objects                    Pages
    Resource                                 412
    Locks                                    509
    XDES                                     219
    SETLS                                    8
    SE Dataset Allocators                    16
    SubpDesc Allocators                      8
    SE SchemaManager                         1169
    SE Column Metadata Cache                 991
    SQLCache                                 893
    Replication                              2
    ServerGlobal                             52
    XP Global                                2
    SortTables                               3691
    (13 row(s) affected)
    Query Memory Objects (internal)          Value
    Grants                                   0
    Waiting                                  0
    Available                                756700
    Current Max                              756700
    Future Max                               756700
    Physical Max                             756700
    Next Request                             0
    Waiting For                              0
    Cost                                     0
    Timeout                                  0
    Wait Time                                0
    (11 row(s) affected)
    Small Query Memory Objects (internal)    Value
    Grants                                   0
    Waiting                                  0
    Available                                12800
    Current Max                              12800
    Future Max                               12800
    (5 row(s) affected)
    Optimization Queue (internal)            Value
    Overall Memory                           6723993600
    Target Memory                            5965963264
    Last Notification                        1
    Timeout                                  6
    Early Termination Factor                 5
    (5 row(s) affected)
    Small Gateway (internal)                 Value
    Configured Units                         32
    Available Units                          32
    Acquires                                 0
    Waiters                                  0
    Threshold Factor                         380000
    Threshold                                380000
    (6 row(s) affected)
    Medium Gateway (internal)                Value
    Configured Units                         8
    Available Units                          8
    Acquires                                 0
    Waiters                                  0
    Threshold Factor                         12
    Threshold                                -1
    (6 row(s) affected)
    Big Gateway (internal)                   Value
    Configured Units                         1
    Available Units                          1
    Acquires                                 0
    Waiters                                  0
    Threshold Factor                         8
    Threshold                                -1
    (6 row(s) affected)
    Memory Pool Manager                      Pages
    Reserved Current                         0
    Reserved Limit                           913664
    (2 row(s) affected)
    Memory Pool (internal)                   Pages
    Allocations                              59136
    Predicted                                248311
    Private Target                           0
    Private Limit                            0
    Total Target                             972800
    Total Limit                              972800
    OOM Count                                0
    (7 row(s) affected)
    MEMORYBROKER_FOR_CACHE (internal)        Pages
    Allocations                              55358
    Rate                                     0
    Target Allocations                       779847
    Future Allocations                       0
    Overall                                  820800
    Last Notification                        1
    (6 row(s) affected)
    MEMORYBROKER_FOR_STEAL (internal)        Pages
    Allocations                              3778
    Rate                                     0
    Target Allocations                       728267
    Future Allocations                       0
    Overall                                  820800
    Last Notification                        1
    (6 row(s) affected)
    MEMORYBROKER_FOR_RESERVE (internal)      Pages
    Allocations                              0
    Rate                                     0
    Target Allocations                       820800
    Future Allocations                       189175
    Overall                                  820800
    Last Notification                        1
    (6 row(s) affected)
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