HP Integrity NonStop J-Series - Manual (Page 68)

Configuring Automatic Transaction Processing
HP NonStop AutoTMF Software User’s Guide—429952-016
4-20
Number of concurrent transactions

Up to 1000 transactions on systems running the NonStop OS version G06.20 or
later. To allow more than the default 100 transactions, you must configure the
ATMFMAXTX global parameter or set the program attribute MAXTX.