4cb7b2e6__s_Manual__Component_Reference__Required
[Attribute] Variable Name [Description] The name of the variable the connection pool is tied to. Multiple connection pools can be used, each tied to a different variable, allowing JDBC Samplers to select the pool to draw connections from. Each pool name must be different. If there are two configuration elements using the same pool name, only one will be saved. JMeter versions after 2.3 log a message if a duplicate name is detected. [Required] 
Yes
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JMeter - User's Manual: Component Reference
Required