rpcmod:svc_default_max_same_xprt

Description

Controls the maximum number of requests that are processed for each transport endpoint before switching transport endpoints. The kernel RPC works by having a pool of service threads and a pool of transport endpoints. Any one of the service threads can process requests from any one of the transport endpoints. For performance, multiple requests on each transport endpoint are consumed before switching to a different transport endpoint. This approach offers performance benefits while avoiding starvation.

Data Type

Integer (32–bit)

Default

8

Range

0 to 2³¹ - 1

Units

Requests

Dynamic?

Yes, but the maximum number of requests to process before switching transport endpoints is set when the transport endpoint is configured into the kernel RPC subsystem. Changes to this parameter only affect new transport endpoints, not existing ones.

Validation

None

When to Change

Tune this number so that services can take advantage of client behaviors such as the clustering that accelerate NFS version 2 WRITE requests. It is possible that increasing this parameter results in the server being better able to take advantage of client behaviors.

Stability Level

Evolving