truncate table test reuse storage;
alter table test deallocate unused keep 100G;
alter table test deallocate unused keep 80G;
alter table test deallocate unused keep 70G;
alter table test deallocate unused keep 60G;
alter table test deallocate unused keep 50G;
alter table test deallocate unused keep 40G;
alter table test deallocate unused keep 30G;
alter table test deallocate unused keep 20G;
alter table test deallocate unused keep 10G;
alter table test deallocate unused keep 1G;
日积月累
