Posted On: Jan 6, 2020

Amazon ElastiCache adds support for Redis open source version 5.0.6. This is a bug fix release with various improvements in stability and memory management. For Redis 5.0.6 open source release notes click here. This release improves the stability of ElastiCache for Redis when dealing with large number of new concurrent connections and with low memory conditions. Additionally, customers can now monitor replication latency with sub-second granularity.  

On March 19th 2019, we announced performance improvements for Redis with enhanced I/O. This improves throughput and reduces latency by leveraging more cores for processing I/O and dynamically adjusting to the workload. Many Amazon ElastiCache customers are leveraging enhanced I/O on M5 and R5 instances to improve overall price performance for their workloads. With this release, we have improved the efficiency of creating and tearing down large number of connections. Another change included with the ElastiCache release of Redis 5.0.6 improves the processing of memory. Instead of blocking the Redis process for a long period during evictions, the eviction is done in batches, improving the availability of Redis under low memory conditions.  

Amazon ElastiCache provides data replication across multiple China Availability Zone (AZs) allowing for improved reliability through node failovers and scalability by adding read replicas. Currently, sub-second replication lag is reported as zero by Amazon ElastiCache. From now on, customers using Redis 5.0.6 will be able to monitor replication lag in milliseconds. 

5.0.6 support is available in Amazon Web Services (Beijing) region, operated by Sinnet and Amazon Web Services China (Ningxia) region, operated by NWCD. 

To get started on ElastiCache for Redis cluster with engine version 5.0.6 log on to Amazon Web Services Management Console.