CloudWatch Logs Insights adds cross log group querying

CloudWatch Logs Insights is an interactive log analytics service in CloudWatch that helps developers, engineers, and operators easily explore, analyze, and visualize logs when debugging applications or when troubleshooting operational problems. Users can get answers in seconds from system and application logs using a log query language, whether they are searching for specific errors across millions of log events, summarizing values across log events to better understand a system or application, or visualizing log data as time series to better understand behavior over time.