Exactly as described, this is a legacy write-true trigger that cleared all port and global FPGA counters for a given entity, subject to the same enabled/running guard as its replacement, and automatically reset to false once processed. Because the description explicitly flags this object as obsoleted in favor of cienaCesBenchmarkEntityEntryClearStats, seeing this object still present but never touched on a live device usually means the management software hasn't yet been updated to use the newer object, not that the clear function itself has stopped working. For example, an older provisioning script still setting this legacy object to true will still successfully clear counters on current firmware, but should be migrated to the newer ClearStats object to avoid relying on a deprecated field.