It's related to buffer cache operation such as quiesce operation , managing fast start IO target, parallel recovery operation , etc On Fri, Jul 23, 2010 at 12:41 PM, Gus Spier <gus.spier@xxxxxxxxx> wrote: > It simply has to be a Friday ... > > Solaris 10 > Oracle 10.2.0.2 EE > > A member of the end-user community calls in a trouble ticket, "The database > is going awfully slow!" No further information or specifics are available > ... just "the database is going awfully slow!" > > addmrpt alerts us to an issue "enq: WL - contention waits in service > SYS$BACKGROUND" and follows that up with an issue "kcrrrcp waits in > SYS$BACKGROUND" > > A quick query to V$EVENT_NAMES tells me that enq: WL refers to log writing > (do I assume this archiving the REDO logs?) ... kcrrrcp is simply listed as > "Other". > > Google has been able to offer very little: a brief reference in our > archives here that deal with an RMAN bug. > > Has anyone seen these types of things before? Is there some other > documentation that I should be looking in? Wasn't there once upopn a time a > Working Aid that decrypted all the kg*, kc*, kl* modules with at least a > good guess about their function and usage. > > Any assistance will appreciated. > > regards, > Gus > -- Thanks & Regards, Taral Desai