load and unload the bats in each round of bloom prejoin, assuming that both dont fit in memory at the same time
load and unload the bats in each round of bloom prejoin, assuming that both dont fit in memory at the same time

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