Give the LGWR its own processor. I have don't once in a particular benchmark and reduced the log file sync wait time by a factor of 10.
----- Original Message ----- To: "Multiple recipients of list ORACLE-L" <[EMAIL PROTECTED]> Sent: Friday, June 21, 2002 9:48 PM > I have an instance that is waiting on log file synchs. I suspect that the > waits are a result of a overly large redo log buffer. There are also > considerable waits on direct path writes. The redo logs are on QuickIO, so I > assume that the writes LGWR is writing asynchronously and not a source of > the log file synchs. I want to be sure that the log file synchs and direct > path writes are not related before I begin to experiment with the size of > the redo log buffer. How can I be sure that the waits are being caused by > DBWR and not LGWR? What are possible fixes for the direct path writes if it > is the DBWR causing them? Multiple DBWR? The datafiles are not on QuickIO, > just the redo. > > Thanks > Erik > > > > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.com > -- > Author: Erik Williams > INET: [EMAIL PROTECTED] > > Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 > San Diego, California -- Public Internet access / Mailing Lists > -------------------------------------------------------------------- > To REMOVE yourself from this mailing list, send an E-Mail message > to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in > the message BODY, include a line containing: UNSUB ORACLE-L > (or the name of mailing list you want to be removed from). You may > also send the HELP command for other information (like subscribing). > -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Anjo Kolk INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
