Specifies the total maximum uncompressed size of a query execution plan multiplied by the number of Motion operators (slices) in the plan. If the size of the query plan exceeds the value, the query is cancelled and an error is returned. A value of 0 means that the size of the plan is not monitored.

You can specify a value in KB,MB, or GB. The default unit is KB. For example, a value of 200 is 200KB. A value of 1GB is the same as 1024MB or 1048576KB.