Servers running APM Server instances could recevies errors that the Server is runnng out of disk space. Adplus crash folders and Crsh Dumps taken manually for Server hung situatoins can be large and be a reason for the Server encountering disk space problems.
Delete the Adplus Crash files, {Process Dump files and the ApM log files periodically on the server.
https://communities.bentley.com/products/assetwise/asset_performance_management/w/wiki/27697/how-do-i-force-a-full-memory-dump-for-a-server-process
https://communities.bentley.com/products/assetwise/asset_performance_management/w/wiki/13375/installing-adplus
https://communities.bentley.com/products/assetwise/asset_performance_management/w/wiki/54243/notes-on-monitoring-and-crash-log-management/edit