Support OldestReplicationSlotLag on PostgreSQL #48
Description
Describe the Feature
Support an RDS alarm on OldestReplicationSlotLag.
Oldest Replication Slot Lag (MB):
The lagging size of the replica lagging the most in terms of write-ahead log (WAL) data received. Applies to PostgreSQL.
We lose an RDS alarm on OldestReplicationSlotLag when changing our module:
- from https://github.com/BetterWorks/terraform-aws-rds-cloudwatch-sns-alarms.git?ref=tags/0.3.6
- to https://github.com/cloudposse/terraform-aws-rds-cloudwatch-sns-alarms.git?ref=tags/0.3.1
See
- https://github.com/BetterWorks/terraform-aws-rds-cloudwatch-sns-alarms/blob/master/alarms.tf#L128
- 3b67e09
Related refs:
- https://dba.stackexchange.com/questions/195040/spike-in-aws-rds-oldest-replication-slot-lag
- https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/rds-metrics.html
Expected Behavior
When an RDS is using PostgreSQL, the monitoring includes OldestReplicationSlotLag.