Start/notes.ini Parameters/Server_Cluster_Probe_Interval

Server_Cluster_Probe_Interval

🛠️
Parameter: Server_Cluster_Probe_Interval
Short description: Interval (in minutes) at which cluster mates probe each other to determine availability and latency.

Profile

Parameter
Server_Cluster_Probe_Interval
Category
Cluster
Component
Server
Available since
R4.5
Supported versions
9.0.1, 10.0, 11.0, 12.0, 14.0, 14.5
GUI equivalent
Server document
Possible values
Integer in minutes, default 1

Description

⚠️
Verify spelling. The cluster-probe concept is HCL-real (Server Properties → Cluster shows 'Cluster probe count' and 'Cluster probe timeout', see othr_serverpropertiescluster_c). A standalone notes.ini switch Server_Cluster_Probe_Interval with default 1 minute is plausible as a complement to Server_Cluster_Probe_Timeout, but is not directly documented in the HCL notes.ini documentation. Verify before production use.
Server_Cluster_Probe_Interval defines how often cluster mates ping each other to establish availability and latency. With the probe results, each server updates its availability index and uses it to decide whether to accept new sessions or pass them on to other mates via failover.
The default of 1 minute provides a very up-to-date view; in stable LAN setups it can be raised to 2–3 to slightly reduce cluster load.

Example configuration

Server_Cluster_Probe_Interval=1

Notes & pitfalls

  • Value in minutes.
  • Set identically on all cluster mates.
  • Pairs with Server_Cluster_Probe_Timeout (failover threshold).
  • Low values slightly increase cluster NRPC load.
  • The change only takes effect after a server restart.