garbage collection - What is a GCRecord in a database? -

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I have recently been introduced with MVC, which uses the SQL database.

There is a column for the tables within the project, OptimisticLockField , and a GCRecord (both types of int ).

I have received quite a lot of information on optimistic / pessimist tones. However, I am not getting this exactly for whom this GCRC card is used, or when it has been used, and why it is involved has not been.

Only one definition is' this is a liner:

A GC record represents a garbage collection activity. Is it free whether GC manual is either GC request or an allocation Due to failure

But there is still no sense what it means, or even if it is correct, definition for this reference.

Is this just a SQL thing? Or should it be used in most / all databases?

The GCRecord field is used to mark objects that have been removed from the archive < / P> is a part of a mechanism called

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