apoc.periodic.iterate do not work in create large relation

[Peter_Lian]

The following code

CALL apoc.periodic.iterate("MATCH(e:Process) MATCH (f:ParentProcess{pid:e.parentID})    RETURN  e,f",

"CREATE(f)-[r:create_process_to]->(e)",

{batchSize:5000, parallel: true}) YIELD batch

Showed the error message : The allocation of an extra 2.0 MiB would use more than the limit 21.0 GiB. Currently using 21.0 GiB. dbms.memory.transaction.total.max threshold reached

After setting the related-configuration, although the error message do not show up but it spend sever hours and no any result was showed, even I changed Batchsize into (100,500,1000).

This may because there're 640 millions nodes, since in the cases of 300 millions node it turn the result wtih only 1 hours successfully.

Problem : How can I get over in this situation (at least show the result...) except create index for them which I were trying now.

Conf. setting :

Since recommended :  (There're 512 GB Memory in my computer)