getInputData can't chew through enough of the records via a cache dataset, chokes, dies

SuiteAnswers 40768 may help. you can contact NetSuite support and they can enable Mass Deletion for you.

What about returning less records from your saved search? Just add a couple of filters in your saved search. Then run multiple times your map/reduce as needed.

Unfortunately it’s abstracted as I can get it from filtering.. so I might just dynamically chunk it (only do even/odd internal IDs 😂)

if you have the BFN SuiteApp "SAFE" guide for reference, there is a section Using Parent-Child Relationships to Perform Mass Create/Update you can potentially use similar "hack" of creating dummy parent-child relationship to execute mass delete in bulk as well (where only involves adding/removing Custom record as children to dummy parent, so is much less governance and I assume quicker performance in theory) just threw together a mock script in demo account, created 10K custom records in ~1.5min and deleted them in ~1min just via script debugger using this method, but individual account performance might vary

Great idea for a future implementation

gotcha guess I would have to understand whole usage of the custom rec, but seems could still temporarily tie it to a dummy parent without being invasive or really affecting anything else during bulk delete execution - but I totally get situations where cannot have full control :)

I would try outputting the list of internal IDs to delete to a CSV using the Task Module and then load it in script and read line by line to delete each record