vSphere
Replication Operations Run Slowly as the Number of Replications
IncreasesLast Updated March 14, 2025
vSphere
Replication
Operations Run Slowly as the Number of Replications
IncreasesAs you increase the
number of virtual machines that you replicate,
vSphere
Replication
operations can run more slowly.
Response times for
vSphere
Replication
operations can increase as you replicate more virtual
machines. You possibly experience recovery operation timeouts or failures for a
few virtual machines, and RPO violations.
Every virtual machine in a datastore
generates regular read and write operations. Configuring
vSphere
Replication
on those virtual machines adds another read operation
to the regular read and write operations, which increases the I/O load on the
storage. The performance of
vSphere
Replication
depends on the I/O load of the virtual machines that
you replicate and on the capabilities of the storage hardware. If the load
generated by the virtual machines, combined with the extra I/O operations that
vSphere
Replication
introduces, exceeds the capabilities of your storage
hardware, you might experience slow response times.
When running
vSphere
Replication
, if response times are greater than 30 ms, reduce the
number of virtual machines that you replicate to the datastore. Alternatively,
increase the capabilities of your hardware. If you suspect that the I/O load on
the storage is an issue and you are using VMware
vSAN
storage,
monitor the I/O latency by using the monitoring tool in the
vSAN
interface.