CODEWITHSUNDEEP
databasegarbage-collectionssms
user3913686
user3913686

Reputation:

What is a GCRecord in a database?

I have been recently introduced to MVC, in which uses a SQL database.

In most of the tables within the project, there is a column for OptimisticLockField, and a GCRecord (both of type int).

I have found quite extensive info on the Optimistic/pessimistic locks. However, I can't find exactly what this GCRecord is used for, or when it is used, nor why it was included.

The only 'definition' is this one liner:

A GC record represents a single garbage collection activity. It is independent of whether the GC occured due to a manual GC request or an allocation failure.

But am still none the wiser as to what this means, or even if it is the right 'definition' for this context.

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

Upvotes: 1

Views: 1791

Answers (1)

darronz
darronz

Reputation: 903

The GCRecord field is used to mark objects which have been removed from the collection. It is part of a mechanism called deferred deletion

Upvotes: 1

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