Alert History not purged in InfraStruXure Central.
StruxureWare Data Center Expert
Alert History is currently not purged in ISXC. The Alert Binary Data, which can be purged, references camera clips captured as part of an alert but not the actual alert text information.
The actual text of the alert does not take up much memory and has not been seen to cause a problem yet this issue may be addressed in a future revision of ISXC.