[google-cloud-sql-discuss] Cloud SQL Read Replica Legging behind master

It seems replication to read replica is not working properly with CloudSQL. Every day the replication delay graph spike is high and not draining. I'm using a master instance with 15GB memory/4 vCPUs while read replica is with 30GB memory/8 vCPUs. So I don't think there is a memory issue. Can you please help me out with this please?

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