Windows Message Server
HCL OneDB™ for Windows™ runs as a service under the informix user account.
The HCL OneDB Message Server service communicates with the database server through the named pipes interprocess communications mechanism to receive information and to write it to the Windows Application Event log and log file %INFORMIXDIR%\%INFORMIXSERVER%.log.
The database server starts Message Server when an instance of the database server first must write a message to the event log. Message Server does not terminate automatically when an instance of the database server terminates.