Managing maintenance - Amazon ElastiCache for Redis

Managing maintenance

Every cluster and replication group has a weekly maintenance window during which any system changes are applied. If you don't specify a preferred maintenance window when you create or modify a cluster or replication group, ElastiCache assigns a 60-minute maintenance window within your region's maintenance window on a randomly chosen day of the week.

The 60-minute maintenance window is chosen at random from an 8-hour block of time per region. The following table lists the time blocks for each region from which the default maintenance windows are assigned. You may choose a preferred maintenance window outside the region's maintenance window block.

Region Code Region Name Region Maintenance Window
ap-northeast-1 Asia Pacific (Tokyo) Region 13:00–21:00 UTC
ap-northeast-2 Asia Pacific (Seoul) Region 12:00–20:00 UTC
ap-northeast-3 Asia Pacific (Osaka) Region 12:00–20:00 UTC
ap-southeast-3 Asia Pacific (Jakarta) Region 14:00–22:00 UTC
ap-south-1 Asia Pacific (Mumbai) Region 17:30–1:30 UTC
ap-southeast-1 Asia Pacific (Singapore) Region 14:00–22:00 UTC
cn-north-1 China (Beijing) Region 14:00–22:00 UTC
cn-northwest-1 China (Ningxia) Region 14:00–22:00 UTC
ap-east-1 Asia Pacific (Hong Kong) Region 13:00–21:00 UTC
ap-southeast-2 Asia Pacific (Sydney) Region 12:00–20:00 UTC
eu-west-3 EU (Paris) Region 23:59–07:29 UTC
af-south-1 Africa (Cape Town) Region 13:00–21:00 UTC
eu-central-1 Europe (Frankfurt) Region 23:00–07:00 UTC
eu-west-1 Europe (Ireland) Region 22:00–06:00 UTC
eu-west-2 Europe (London) Region 23:00–07:00 UTC
me-south-1 Middle East (Bahrain) Region 13:00–21:00 UTC
me-central-1 Middle East (UAE) Region 13:00–21:00 UTC
eu-south-1 Europe (Milan) Region 21:00–05:00 UTC
sa-east-1 South America (São Paulo) Region 01:00–09:00 UTC
us-east-1 US East (N. Virginia) Region 03:00–11:00 UTC
us-east-2 US East (Ohio) Region 04:00–12:00 UTC
us-gov-west-1 AWS GovCloud (US) region 06:00–14:00 UTC
us-west-1 US West (N. California) Region 06:00–14:00 UTC
us-west-2 US West (Oregon) Region 06:00–14:00 UTC
Changing your Cluster's or Replication Group's Maintenance Window

The maintenance window should fall at the time of lowest usage and thus might need modification from time to time. You can modify your cluster or replication group to specify a time range of up to 24 hours in duration during which any maintenance activities you have requested should occur. Any deferred or pending cluster modifications you requested occur during this time.


If you want to apply node type modifications and/or engine upgrades immediately using the AWS Management Console select the Apply Immediately box. Otherwise these modifications will be applied during your next scheduled maintenance window. To the use the API, see modify-replication-group or modify-cache-cluster.

More information

For information on your maintenance window and node replacement, see the following: