Sqlplus process count in Unix

I need to process 50 sqlplus scripts. At any point of time, the number of scripts running shouldn't exceed 6. If any one of the scripts completes successfully then another one needs to kick off, till all scripts are processed.
How do I do this?
I tried these, but it didn't work:
if [[ `ps -ef|grep "sqlplus -s scott"|grep -v "grep"|wc -l` -eq 6 ]] ; then
wait
fi

"Wait" waits for the job completion while "sleep" is basically a pause.
I guess there needs to be 2 loops. One looping through the sql list and another one checking the number sql sessions opened at any time.
Say, the first loop kicks off the first 6 sqls. Now the sqls read and running are the same : 6. After some time, 2 sqls get done. Now the sqls read is 6 but the sqls running is 4. So the first loop should read the next two sqls, 7 & 8, and execute them.
This is what I need to do.

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Message was edited by:
The Human Fly

Sqlplus process count in Unix

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