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log backup size after transactionl replication setup

HI All, i have set up transactional replication for a database in a 3 node always on cluster using the steps outlined below:

https://techcommunity.microsoft.com/t5/SQL-Server-Support/Setting-up-Replication-on-a-database-that-is-part-of-an-AlwaysOn/ba-p/318171

as a result of this the transaction log backups are quite large. i have rescheduled the tlog backup job to run every 5 minutes to maintain the log file size itself. My issue is i don't understand why the db log file is so busy after the replication setup.

has anyone else had this issue? any details would be greatly appreciated .

replicationsql server 2012always-ontransactional-replication
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What do you see when you run the following query?

SELECT name, recovery_model_desc, log_reuse_wait_desc FROM sys.databases

(filter for the databases you're concerned about)

In particular, that last column?

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