I remember readign that article and I thought the results that the contention was very minor? Steve, are you monitoring?
It seemed like one of those things that its so minor its not really something to worry about? ----- Original Message ----- To: "Multiple recipients of list ORACLE-L" <[EMAIL PROTECTED]> Sent: Friday, January 09, 2004 12:09 PM > > > To the OP: Other people point out common reasons for library cache latch > > > contention. A less common reason is extensive use of public synonyms. > > > If that's the reason, you also see row cache objects latch contention. > > > > I'm not sure that's right. If everyone uses a public synonym, then > > you get one sql text, and one cursor. I think the contention appears > > because everyone has to have a 'non-existent' reference in memory > > to say that they don't own an object with the same name as the public > > synonym - consequently if you have lots of users who have to check > > long chains of 'non-existent' then the latches get held for longer > > periods of time. > > Hi Jonathan, > > I don't see how your statement contradicts the claim that heavy use of public > synonyms causes contention for not only library cache latches but also row > cache objects latches. What I had in mind is Steve Adams' test. Here's the URL > http://www.ixora.com.au/newsletter/2001_05.htm#synonyms. If I understand right, > the additional row cache objects latch gets are for synonym translations, > particularly public synonym translations. > > Yong Huang > > __________________________________ > Do you Yahoo!? > Yahoo! Hotjobs: Enter the "Signing Bonus" Sweepstakes > http://hotjobs.sweepstakes.yahoo.com/signingbonus > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.net > -- > Author: Yong Huang > INET: [EMAIL PROTECTED] > > Fat City Network Services -- 858-538-5051 http://www.fatcity.com > San Diego, California -- Mailing list and web hosting services > --------------------------------------------------------------------- > 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.net -- Author: Ryan INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- 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).
