Database read and write large

Hello,
I'm using Exchange 2010 in my company with around 200 mailbox.
The exchange database are stored in our SAN network, drive is mount by Iscsi on the 2008 r2 sp1
Problem is, the network traffic is huge. We have one link special for this server (thats a virtual server on Hyper-V) and the network link is always at 70 Mbps and goes sometimes up to 130 Mbps (10 Gb/s link)
I do not know why the link is use so much and i try to know why ?
Used Exmon to see mailbox of each user, nothing special appear.
Thanks for your help.

Hi,
There are 2 database, one with like 140 users, and the other one with 60 user.
Role installed on my server : IIS, AD, File Services. (server is not a domain controler).
[PS] C:\Windows\system32>get-ThrottlingPolicy
RunspaceId : *An ID*
IsDefault : True
AnonymousMaxConcurrency : 1
AnonymousPercentTimeInAD :
AnonymousPercentTimeInCAS :
AnonymousPercentTimeInMailboxRPC :
EASMaxConcurrency : 10
EASPercentTimeInAD :
EASPercentTimeInCAS :
EASPercentTimeInMailboxRPC :
EASMaxDevices : 10
EASMaxDeviceDeletesPerMonth :
EWSMaxConcurrency : 10
EWSPercentTimeInAD : 50
EWSPercentTimeInCAS : 90
EWSPercentTimeInMailboxRPC : 60
EWSMaxSubscriptions : 5000
EWSFastSearchTimeoutInSeconds : 60
EWSFindCountLimit : 1000
IMAPMaxConcurrency :
IMAPPercentTimeInAD :
IMAPPercentTimeInCAS :
IMAPPercentTimeInMailboxRPC :
OWAMaxConcurrency : 5
OWAPercentTimeInAD : 30
OWAPercentTimeInCAS : 150
OWAPercentTimeInMailboxRPC : 150
POPMaxConcurrency : 20
POPPercentTimeInAD :
POPPercentTimeInCAS :
POPPercentTimeInMailboxRPC :
PowerShellMaxConcurrency : 18
PowerShellMaxTenantConcurrency :
PowerShellMaxCmdlets :
PowerShellMaxCmdletsTimePeriod :
ExchangeMaxCmdlets :
PowerShellMaxCmdletQueueDepth :
PowerShellMaxDestructiveCmdlets :
PowerShellMaxDestructiveCmdletsTimePeriod :
RCAMaxConcurrency : 20
RCAPercentTimeInAD : 5
RCAPercentTimeInCAS : 205
RCAPercentTimeInMailboxRPC : 200
CPAMaxConcurrency : 20
CPAPercentTimeInCAS : 205
CPAPercentTimeInMailboxRPC : 200
MessageRateLimit :
RecipientRateLimit :
ForwardeeLimit :
CPUStartPercent : 75
AdminDisplayName :
ExchangeVersion : 0.10 (14.0.100.0)
Name : DefaultThrottlingPolicy_5fa5b9e4-a13b-4cf6-93a9-1eef6db05a03
DistinguishedName : CN=DefaultThrottlingPolicy_5fa5b9e4-a13b-4cf6-93a9-1eef6db05a03,CN=Global S
ettings,CN=*DOMAIN*,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=*DOMAIN*
Identity : DefaultThrottlingPolicy_5fa5b9e4-a13b-4cf6-93a9-1eef6db05a03
Guid : 6aa37e30-cac2-40fb-8d42-acafdcebb54e
ObjectCategory : *DOMAIN*/Configuration/Schema/ms-Exch-Throttling-Policy
ObjectClass : {top, msExchGenericPolicy, msExchThrottlingPolicy}
WhenChanged : 07/07/2011 14:26:28
WhenCreated : 07/07/2011 14:26:22
WhenChangedUTC : 07/07/2011 12:26:28
WhenCreatedUTC : 07/07/2011 12:26:22
OrganizationId :
OriginatingServer : *DOMAIN CONTROLER*.*DOMAIN*
IsValid : True

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What I wish is
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Thanks you.
Edited by: yccheok on Oct 27, 2009 8:39 PM

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Hi everybody,
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HI,
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1e36fe40-5d07-412e-8ed2-704c647ed7a7 wrote:
HI,
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SQL> desc v$IOSTAT_FILE
Name                                      Null?    Type
FILE_NO                                            NUMBER
FILETYPE_ID                                        NUMBER
FILETYPE_NAME                                      VARCHAR2(28)
SMALL_READ_MEGABYTES                               NUMBER
SMALL_WRITE_MEGABYTES                              NUMBER
LARGE_READ_MEGABYTES                               NUMBER
LARGE_WRITE_MEGABYTES                              NUMBER
SMALL_READ_REQS                                    NUMBER
SMALL_WRITE_REQS                                   NUMBER
SMALL_SYNC_READ_REQS                               NUMBER
LARGE_READ_REQS                                    NUMBER
LARGE_WRITE_REQS                                   NUMBER
SMALL_READ_SERVICETIME                             NUMBER
SMALL_WRITE_SERVICETIME                            NUMBER
SMALL_SYNC_READ_LATENCY                            NUMBER
LARGE_READ_SERVICETIME                             NUMBER
LARGE_WRITE_SERVICETIME                            NUMBER
ASYNCH_IO                                          VARCHAR2(9)
ACCESS_METHOD                                      VARCHAR2(11)
RETRIES_ON_ERROR                                   NUMBER
SQL>

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