- str-heaps without double elimination can be memory mapped - str-heaps without double elimination get their hash tables zapped on re-load
- str-heaps without double elimination can be memory mapped
- str-heaps without double elimination get their hash tables zapped on re-load

ACID measure. str-heaps are append-only, but the first page with hash table
also get dirty on updates. Zapping them makes the str-heap image consistent
whatever happened.

zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb