N/task Module
MapReduceScriptTaskStatus.getPendingOutputSize()
Method Description: Returns the total size in bytes of all key/value pairs written as output, as a component of total size, by a task.MapReduceScriptTask.
Returns: number
Supported Script Types: Server scripts For more information, see SuiteScript 2.0 Script Types.
Governance: 25 units
Module: N/task Module
Since: 2015.2
Search NetSuite - https://system.netsuite.com/app/help/helpcenter.nl?search=MapReduceScriptTaskStatus.getPendingOutputSize()

// Code Example 1

//Add additional code

//...

var summary = task.checkStatus(scriptTaskId);

var total = summary.getPendingOutputSize()

log.audit({

    title: 'Size',

    details: total}

);

//...

//Add additional code



//SOURCE: https://system.netsuite.com/app/help/helpcenter.nl?fid=section_458842102049.html