Message data global

Hello, 

We noticed from the integrity logs that some of the namespaces in our integration engine are using large amount of space ( ~380GB ) for the global ^EnsHL7.Segment. 

We have culling implemented for large globals like MessageHeader and MessageBody.

Is it a standard process to implement culling for ^EnsHL7.Segment global and any idea about what will be the impact of adding culling to this global?

Not sure if it is possible to implement normal culling task on this Global as I noticed this global content is not accessible via SQL functionality in Management page but only via the Globals in Management portal. 

Thank you for your help.