(OCM) shares this list of the new background processes in Oracle 11g:
VKTM - The virtual keeper of time provides wall-clock time and reference time for other sessions/processes.
FBAR :-) - (sadly now renamed to FBDA partway through the beta) The flashback data archiver writes old row-versions of tables with 'flashback archive' enabled into flashback data archives on commit. Anyone remember Oracle v.5 BIFs?
DIAG - The diagnosibility process (DIAG) runs oradebug commands and triggers diagnostic dumps as part of the new ADR (automatic diagnostic repository) feature, which is a replacement (and major enhancement) for the much-reviled RDA.
DIA0 - The "other" diagnosibility process detects hangs then triggers DIAG do take diagnostics.
SMCO/Wnnn - The space management coordinator and slaves perform space allocation and reclamation.
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