@Override
		public boolean shouldPurge() {
			// Processes have a short time to report - see the javadoc for
			// FLUSH_PERIOD.
			if (m_purgeDelayCount > 0) {
				return true;
			}

			++m_purgeDelayCount;

			return false;
		}
check it should be purged.

@return true if purse is necessary
ngrinder-core/src/main/java/net/grinder/console/communication/AgentProcessControlImplementation.java