in perfdatasource querying for global snapshot failed with error 'the size limit for this '

I received  scom alerts from two win 2k8 r2 servers , hosting exchange 2010 mailbox roles , the alerts came almost in same time from both servers ,

can I ignore those alerts

or can someone give a me a clue how can I troubleshoot those alert , please any help would be appreciated

In PerfDataSource, querying for Global Snapshot failed with error 'The size limit for this '

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from Ops-mgmt logs 

Log Name:      Operations Manager
Source:        Health Service Modules
Date:          
Event ID:      10104
Task Category: None
Level:         Error
Keywords:      Classic
User:          N/A
Computer:       server 1
Description:
In PerfDataSource, querying for Global Snapshot failed with error 'The size limit for this ' 
One or more workflows were affected by this.  

Workflow name: Microsoft.Windows.Server.2008.OperatingSystem.PercentMemoryUsed.Collection 
Instance name: Microsoft Windows Server 2008 R2 Enterprise  

------------

Log Name:      Operations Manager
Source:        Health Service Modules
Date:          
Event ID:      10104
Task Category: None
Level:         Error
Keywords:      Classic
User:          N/A
Computer:       server 1
Description:
In PerfDataSource, querying for Global Snapshot failed with error 'The size limit for this ' 

One or more workflows were affected by this.  

Workflow name: Microsoft.Windows.Server.2008.LogicalDisk.PercentIdle.Collection 
Instance name:  " edb file path "

--------------------

Log Name:      Operations Manager
Source:        Health Service Modules
Date:          
Event ID:      10104
Task Category: None
Level:         Error
Keywords:      Classic
User:          N/A
Computer:       server 2 
Description:
In PerfDataSource, querying for Global Snapshot failed with error 'The size limit for this ' 

One or more workflows were affected by this.  

Workflow name: Microsoft.Windows.Server.2008.NetworkAdapter.CurrentBandwidth.Collection 

-----------

Log Name:      Operations Manager
Source:        Health Service Modules
Date:          
Event ID:      10104
Task Category: None
Level:         Error
Keywords:      Classic
User:          N/A
Computer:   server 2   
Description:
In PerfDataSource, querying for Global Snapshot failed with error 'The size limit for this ' 

One or more workflows were affected by this.  

Workflow name: Microsoft.ForefrontProtection.FPE.Server.PerformanceCollection.RealtimeScanMessageRate