```sql
CREATE TABLE t
(
   id Int64, 
   d String,
   p Map(String, String)
   
)
ENGINE = ReplacingMergeTree order by id settings index_granularity  = 0;


insert into t values (1,  's', {'a':'b'});

CH starts eating RAM until it crashes

the same with

insert into t select 1,  's', map('a','b');

```

{
            
            
            
            
            
            
            
            
            
            
            auto disk = moving_part.reserved_space->getDisk();
            if (supportsReplication() && disk->supportZeroCopyReplication() && settings->allow_remote_fs_zero_copy_replication)
            {
                
                
                
                
                if (auto lock = tryCreateZeroCopyExclusiveLock(moving_part.part->name, disk); lock)
                {
                    cloned_part = parts_mover.clonePart(moving_part);
                    parts_mover.swapClonedPart(cloned_part);
                }
                else
                {
                    
                    LOG_DEBUG(log, "Move of part {} postponed, because zero copy mode enabled and someone other moving this part right now", moving_part.part->name);
                    result = false;
                    continue;
                }