ID 518209 - Unable to backup large databases via Flix

Problem summary
Unable to use the Flix backup process on large databases as it will run out of memory and crash.
Tested on a database with 44,513,407 total rows across tables adding up to a total size of 7322 MB, with a Flix server having 64GB RAM available.
 
Customer reported version
Flix 6.4.0
 
Steps to reproduce
1) Have a database of at least 7 GB
2) Run the Flix server with the --db-backup flag
 
Expected behaviour
The backup process should complete
 
Actual behaviour
The backup process unnecessarily takes up all available memory and crashes:

DEBU[5898]dump.go#L234 mysqldump.createTableValues: creating values                               Table name=sequence_panelfatal error: runtime: out of memory

 
Workaround
Make sure to turn off all Flix servers and then back up the database using mysqldump:

mysqldump -h MYSQL_HOSTNAME -uMYSQL_USERNAME -p MYSQL_FLIX_DATABASE | gzip > flix_mysql_dump.sql.gz

 
Reproduced by support
This bug has been reproduced in:
6.4.1 - CentOS 7
6.2.0 - CentOS 7
 
Earliest version tested
6.2.0 - This issue appears to be in all tested versions of the product