calculateRamSize() still multiplies the number of timestamp blocks by alignedTvListArrayMemCost(), which assumes that every column has a materialized primitive array in every block. That assumption is no longer valid after this change.

Thanks, fixed in a335107. AlignedTVList now updates materializedValueArrayMemCost when getOrCreateValueArray() allocates a primitive array. calculateRamSize() uses the per-block cost without value primitive arrays plus the incrementally tracked materialized-array cost, so it no longer assumes dense value arrays or scans all blocks. The tracked state is also handled by clone, projection, column extension, and clear paths.

This still charges the dense per-block cost for every existing column whenever a new block is acquired, while AlignedTVList.expandValues() now only adds null placeholders and allocates primitive arrays on their first actual write.

Thanks, fixed in a335107. The aligned row, rows, and tablet estimators now split the charge into: (1) the base aligned-TVList block cost without value primitive arrays, (2) placeholder/bitmap cost for newly extended columns, and (3) primitive-array cost only when a successful non-null write first materializes that column/block. Sparse, null, and failed-write paths are covered by tests; the tablet path also skips per-row checks when both bitmap and results are absent.