diff --git a/docs/products/postgresql/concepts/upgrade-failover.md b/docs/products/postgresql/concepts/upgrade-failover.md index ac14680f..e91c0522 100644 --- a/docs/products/postgresql/concepts/upgrade-failover.md +++ b/docs/products/postgresql/concepts/upgrade-failover.md @@ -32,25 +32,25 @@ different procedures in case of primary or replica nodes disconnections. ### Primary server disconnection -If the **primary** server disappears, Aiven's management platform uses -a **60-second timeout** before marking the server as down and promoting -a replica server as new primary. During this 60-second timeout, the -master is unavailable (`servicename-projectname.aivencloud.com` does not -respond), and `replica-servicename-projectname.aivencloud.com` works -fine (in read-only mode). - -After the replica promotion, `servicename-projectname.aivencloud.com` -would point to the new primary server, while -`replica-servicename-projectname.aivencloud.com` becomes unreachable. -Finally, a new replica server is created, and after the synchronisation -with the primary, the `replica-servicename-projectname.aivencloud.com` -DNS is switched to point to the new replica server. +If the primary server disappears, Aiven's management platform uses an initial 60-second +timeout before marking the server as down and promoting a replica server as new primary. +During this 60-second timeout, the master is unavailable +(`servicename-projectname.aivencloud.com` does not respond), and +`replica-servicename-projectname.aivencloud.com` works fine (in read-only mode). + +After the replica promotion, `servicename-projectname.aivencloud.com` would point to the +new primary server, while `replica-servicename-projectname.aivencloud.com` becomes +unreachable. Finally, a new replica server is created, and after the synchronisation with +the primary, the `replica-servicename-projectname.aivencloud.com` DNS is switched to point +to the new replica server. + +Recovery time can take up to 180 seconds depending on client side settings and when in the +DNS TTL cycle the disconnection occurs. ### Replica server disconnection -If the **replica** server disappears, Aiven's management platform uses -a **60-second timeout** before marking the server as down and creating a -new replica server. +If the replica server disappears, Aiven's management platform uses an initial 60-second +timeout before marking the server as down and creating a new replica server. :::note Each Aiven for PostgreSQLĀ® Business plan supports one replica server @@ -69,6 +69,9 @@ The DNS record pointing to primary server `SERVICE_NAME-PROJECT_NAME.aivencloud.com` remains unchanged during the recovery of the replica server. +Recovery time can take up to 180 seconds depending on client side settings and when in the +DNS TTL cycle the disconnection occurs. + ## Controlled switchover during upgrades or migrations :::note