Hi,
the problem *seems* (i'm not sure) that when you try to start all your application, thet go in conflict for ram usage.
Since they are all 32bit application, they share the first 1,7Gb of RAM.
This means that oracle, Cobol interpreter and you programs all share the same memory.
So, the last to come may go into problem in finding enough space in memory free, or a sufficient large area.
How is your sga ? (check with svrmgrl> "show sga"). This usually takes up a good bunch of RAM. Next you apps take the remainig.
You said you have just 1G of phisical RAM, but you defined about 5Gb of swap, so that your apps can lock large area of memory. This means, to me, that you know your process will reclaim much memory.
And they go all in the first part of the RAM.
If your C code is 64bit it can go in the upper memory, otherwise is another fellow reclaiming memory, and all of them reclaming the first 1,7Gb, not using anything beyond it.
This is not related to the physical memory you have, but to how much your process ask for.
For this purpose, if it is your case, you can use the memory window, to use the other areas.
You have also to check if your code works properly, althought this should be transparent.
It should be masqueraded by the S.O., but since you wrote code to clean semahpores and memory segment, you may incurr into problems.
Remember also that if you plan to use much memory, you must check for paging, to avoid performance problems. Or add more ram, but this is oblivious..
Here is a little script (Thanks to Twang) to check memory usage of a user, try it to see how much is allocated.
#!/bin/ksh
t=0
for j in `UNIX95= ps -e -o vsz=Kbytes -o ruser -o pid,args=Command-Line | sort -
rnk1 | grep -v Kbytes | grep | awk '{print $1}'`
do
t=`expr $t + $j`
done
echo "\nMemory claimed by : $t Kbytes .\n"
HTH,
Massimo
