We have added one new server into the existing production, OS 2019 Core, Exchange Server 2019. We have moved one of the databases DAG copy on this server and started to face performance issues and we check it via setting performance counter found that there is always a backlog RPC Operations/sec where on other servers its always on 0.
We moved back the DB to other servers and try to check the same with one DB which's having a single mailbox but again there is always RPC Operations/sec backlogs and which is increasing IS RPC latency so whoever client is connected to this CAS server started to face the slowness in accessing MAPI mailboxes.
We have checked all the Application and System Event logs but did not find anything related.
Server Hardware Configurations are below
HP ProLiant DL360p Gen8
Intel Xeon E5-2650L v2 @ 1.70GHz, 1701 Mhz, 10 Core(s), 20 Logical Processor(s)
Intel Xeon E5-2650L v2 @ 1.70GHz, 1696 Mhz, 10 Core(s), 20 Logical Processor(s)
Memory 128 GB
DISK Enterprise SSD (RAID 0)