An upgrading subscription settings failure led to missing replication metadata. Preserve the topology and establish whether replication is still required.
SQL SERVER – Parallel Redo on AlwaysOn Secondary – DIRTY_PAGE_TABLE_LOCK
Redo lag and high DIRTY_PAGE_TABLE_LOCK waits hit a client’s AlwaysOn secondary. Here is how Parallel Redo in SQL Server 2016 causes them and what to do.






