Can't connect to the IMS database from a remote HP-UX system
A description of this resolution:
- Increase OMF memory
Problem Details: The IMS went off the DCN every Five minutes
A new RTAB had been installed in the IMS. The Memory SIMMS were installed.
Cross DCN Test was done by disconnecting one media.
System performance for the node indicated that the pools were adequate.
The node fell off the DCN still at five minute intervals
It was decided to arm the SYSTEM_LOG_ACTIVE = Y, restart the IMS and wait for a crash.
/var/opt/advant/log/IMS/dcSystem.log and the /var/opt/advant/log/IMS/dcSystem.old
This showed the Virtual Memory was short because of the Protocol Machine crashing.
The OMF memory was increased to 10238 K bytes fro the default 3072
Q. Set the SYSTEM_LOG_ACTIVE to Y
U.11 Usage of dcSystem.log
All system messages are routed to the System Message Log and can be displayed with the
System Message Log Display. If problems occur a flag can be turned on to get more information
output to the file /var/opt/advant/log/IMS/dcSystem.log. also /var/opt/advant/log/IMS/dcSystem.old
Edit the /opt/advant/Startup/etc/dcStartup.env file and set the
The IMS must be restarted to activate/deactivate the log file.
The dcSystem.log can be used to analyze how the system is running. However the log file
should normally not be used as standard since it can grow quite large and fill the system disk.
If the file gets large it can be truncated without stopping the IMS through the following
cp /dev/null /var/opt/advant/log/IMS/dcSystem.log
R.4.9.5 Updating the OMF config.cfg File
The default memory allotment for OMF shared memory is 3 MB. If Memory Extensions For
User Objects and History indicate that more memory is required, you must update the OMF
config.cfg file located in /etc/opt/advant/OMF.
To do this:
Q. Change the access rights for the configuration file:
chmod 644 /etc/opt/advant/OMF/config.cfg
R. Modify the content of the configuration file config.cfg
The parameters are defined with the following syntax:
parameter name = value
The parameters are grouped in different sections. A new section is started with:
Under the section [SharedMemory] change the memory size. The size must be a
multiple of 256:
# Size is in Kbytes
Size = 3072 --> New value
S. Restore the access rights for the configuration file:
chmod 444 /etc/opt/advant/OMF/config.cfg
T. Restart the IMS.
'Not enough OMF memory' resolves the following:
- IMS will not stay on the DCN