System Startup, Configuration, and Shutdown Reference Manual (32650-90907)

Chapter 6
Modifying Logging Configurations
Entering the LOG Configurator
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NOTE Some events are permanently set to ON. Currently, events 101, 111, 146, and 150 are forced on
by MPE/iX.
NOTE MPE/iX is shipped from the factory with event number 116 "Program File Event" turned ON.
Hewlett-Packard recommends that customers leave this event turned ON, as it can be useful
for detecting potentially incompatible (and rare) runtime events.
Logging User Events
User logging provides a means for system users and subsystems to record additions and modifications to
databases and other files using application programs. The system manager determines the maximum number
of logging processes and the maximum number of users per logging process. The ULOG command configures
the user logging process parameters. ULOG has the following parameters:
ULOG (UL) [NLOGPROCS = numberprocesses allowed ]
[USERSPERPROC = usersperloggingprocess]
NLOGPROCS controls the user logging ID (LID) table size. Lowering NLOGPROCS loses all current logging ID
information from the tape created by SYSGEN. If NLOGPROCS remains unchanged or increases, the current
logging ID information is copied to tape. The minimum and maximum number of processes allowed are 2 and
128, respectively.
USERSPERPROC specifies the maximum number of users assigned to each configured logging process. The
minimum and maximum number of users per logging process are 1 and 1140, respectively.
NOTE Changing NLOGPROCS takes effect when a tape is created and an UPDATE CONFIG or INSTALL is
conducted. Refer to Chapter 3, “System Startup Functions,” for information on installing or
updating the operating system.
To set the number of processes or users per process, enter ULOG followed by the number of processes or users:
log>ULOG 40 ** Number of Processes **
or
log>ULOG USERSPERPROC=40 ** Number of Users per Process **
Clearing Log Configuration Changes
If you desire to clear all LOG configuration changes made, enter the CLEAR command at the LOG configurator
prompt.
log>CLEAR
Once a SYSGEN> KEEP is done, the changes kept become permanent and CLEAR does not remove them.
Holding and Saving Configuration Changes
Using the system logging and user logging commands described in the following sections changes the LOG
configuration specified in the SYSGEN command line or global BASEGROUP command. These changes are
temporary and are easily lost if not properly saved.