public void updateMonitorStat(Long perfTestId, Map<String, SystemDataModel> systemInfos) {
		String json = JsonUtils.serialize(systemInfos);
		if (json.length() >= 2000) {
			Map<String, SystemDataModel> systemInfo = Maps.newHashMap();
			int i = 0;
			for (Entry<String, SystemDataModel> each : systemInfos.entrySet()) {
				if (i++ > 3) {
					break;
				}
				systemInfo.put(each.getKey(), each.getValue());
			}
			json = JsonUtils.serialize(systemInfo);
		}
		hazelcastService.put(DIST_MAP_NAME_MONITORING , perfTestId , json);
	}
Put the given {@link org.ngrinder.monitor.share.domain.SystemInfo} maps into the given perftest entity.

@param perfTestId  id of perf test
@param systemInfos systemDataModel map
ngrinder-controller/src/main/java/org/ngrinder/perftest/service/PerfTestService.java