Reduce off-heap memory requirements TPC 1TB benchmarks

[andygrove]

What is the problem the feature request solves?

As seen in #3799, Comet requires at least 32GB off-heap memory to avoid OOMs. This seems excessive. This issue is to track investigations and potential fixes.

Describe the potential solution

No response

Additional context

No response

[andygrove]

Fixed in #3924