Gokulakannan Somasundaram wrote: > a) When i was looking at the code for freezing heap tuples, i found out the > following. While freezing we log the complete block(not just the tuples we > froze). > b) Again after removing the dead tuples and fragmentation, we log the > complete block.
Umm, no we don't. In log_heap_freeze, we log an array of offsets, of those tuples that were frozen.
Perhaps you're been confused by full page writes? If a block hasn't been modified by last checkpoint, then we do log the whole page for any operation, including vacuuming and freezing. (except setting hint bits).
