Just wanted to provide a heads up if you are converting your DDM (mysql) db from myisam to innodb in 10.3 and above that the innodb will consume approximately 40% more disk space:
CA Spectrum 10.3 mysql InnoDB is consuming more sp - CA Knowledge
We still recommend the change to InnoDB, given the performance improvements.
Steps for conversion:
Upgrading - CA Spectrum - 10.3 - CA Technologies Documentation