Hi,
well, MODx basic requirement is 32Mb for the memory_limit. Its running locally with only 10Mb is probably due to the fact everything had always been done before you set the memory to 10Mb...
now, i’d just add that an hoster offering only 10Mb of memory is, how to say that, abusing

most of them offering often more than the required 32Mb (64 and more)
Have swing