Start/notes.ini Parameters/SERVER_DEADLOCK_CHECK_TIME

SERVER_DEADLOCK_CHECK_TIME

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Parameter: SERVER_DEADLOCK_CHECK_TIME
Short description: Interval at which the server checks for thread deadlocks and, if needed, automatically triggers an NSD with stack trace.

Profile

Parameter
SERVER_DEADLOCK_CHECK_TIME
Category
Performance / Memory
Component
Server
Available since
10.0
Supported versions
10.0, 11.0, 12.0, 14.0, 14.5, 14.5.1
GUI equivalent
notes.ini only (no GUI)
Possible values
Seconds (default 300; 0 = disabled)

Description

Domino internally monitors whether threads are waiting on each other's locks and thereby driving the server into a deadlock. When a deadlock is detected, the watchdog automatically triggers an NSD and panics the server if necessary (Fault Recovery). SERVER_DEADLOCK_CHECK_TIME defines how often this check runs.
Smaller values detect deadlocks earlier but cost a little CPU; larger values save resources but delay diagnosis and recovery.

Example configuration

SERVER_DEADLOCK_CHECK_TIME=180

Notes & pitfalls

  • Value in seconds.
  • 0 disables the check entirely – not recommended.
  • NSD output lands in IBM_TECHNICAL_SUPPORT/; correlate with date / time.
  • Pairs with FAULT_RECOVERY=1, FAULT_RECOVERY_NUMBER, Debug_Threadpool.
  • The change takes effect after a server restart.