select p.spid from v$session s, v$process p where s.paddr = p.addrI think it get values for the Unix PID of the background process, but I'm beginning to have my doubts.
If you want to get info on the background processes, change your query to:
select p.spid, b.description from v$process p, v$bgprocess b where p.addr = b.paddr ;The spid will be the UNIX process id for the background process.
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This was first published in April 2002