To reduce the used disk space, you can first archive and then delete all log files of the ARIS installation. Two batch files are provided for this: collectLogFiles and cleanLogFiles (.bat on Windows, .sh on Linux). On Windows systems, the files are available in the support folder of the ARIS installation directory>.
On Linux systems, you can find them in the home directory of the ARIS user that is created by the ARIS Cloud Controller Linux packages: