Start/notes.ini Parameters/Server_Min_Possible_Trans_Time

Server_Min_Possible_Trans_Time

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Parameter: Server_Min_Possible_Trans_Time
Short description: Lower bound of transaction time (in 1/100 s) for calculating the availability index – below this the index stays at 100 %.

Profile

Parameter
Server_Min_Possible_Trans_Time
Category
Performance / Memory
Component
Server
Available since
9.0.1
Supported versions
9.0.1, 10.0, 11.0, 12.0, 14.0, 14.5, 14.5.1
GUI equivalent
notes.ini only (no GUI)
Possible values
Integer in 1/100 s (default 100 = 1 s)

Description

The availability index (Server.AvailabilityIndex) scales linearly between a minimum and a maximum expected transaction time. Server_Min_Possible_Trans_Time defines the lower bound: as long as the average transaction time within the observation window stays below this value, the server is considered optimally available (index = 100 %). Only above this value does the index slowly start to drop – reaching 0 % at Server_Max_Possible_Trans_Time.
The value is given in hundredths of a second – so 100 corresponds to 1 second.

Example configuration

Server_Min_Possible_Trans_Time=100

Notes & pitfalls

  • Unit: 1/100 s, not milliseconds.
  • Pairs directly with Server_Max_Possible_Trans_Time, Server_Transinfo_Range, SERVER_AVAILABILITY_THRESHOLD.
  • A value that is too high artificially “prettifies” the index – real problems become visible too late.
  • A value that is too low makes the index drop already under normal load – unnecessary cluster failovers.
  • The change takes effect after a server restart.