The problem with Statspack is that it internally pre-defines what waits are "idle" waits and excludes them from the report. Some of this exclusion, as well as inclusion of other waits, IMO, is rather confusing. I would like to see SQL*Net related waits reported (in some situations) and waits related to PQ not at all (well, unless I have to know).
One can always 'trick' statspack to report (or not to report) certain waits. It can be done by manipulating the table STATS$IDLE_EVENT in PERFSTAT schema. If you looked at the spreport.sql a bit closely, it excludes reporting waits that are in this table. The script spctab.sql builds this table and inserts a few 'idle waits' to it. Regards, - Kirti -----Original Message----- Sent: Tuesday, May 21, 2002 4:39 PM To: Multiple recipients of list ORACLE-L Arrggghhh. Well that was a easy problem to fix, just define 'wait' differently. Now on to the next item on my list. > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Rachel > Carmichael > Sent: Tuesday, May 21, 2002 5:16 PM > To: Multiple recipients of list ORACLE-L > Subject: Re: ID This Wait stat > > > according to the docs and a friend in COE, slave wait is an "idle > event" -- it means that the dbwr slave is waiting for something to do > > in other words, it ain't busy... not a "real" wait > > > --- Tom Schruefer <[EMAIL PROTECTED]> wrote: > > > > You know I could have all the documentation for Oracle printed on my > > brain, > > buy all the books ever written about the subject, but the primary > > wait > > problem that comes up will never be directly addressed. > > > > So, what exactly does 'Slave Wait' mean and what can I do about it? > > > > > > I am using DBWR Slaves, since it did not seem as though starting > > additional > > DBWR's was appropriate on a Win2000 system. > > > > Here are the Top 5 wait events as per Statpack and my shinny new > > 'Oracle > > Performance Tuning 101' book: > > > > Top 5 Wait Events > > ~~~~~~~~~~~~~~~~~ Wait > > % > > Total > > Event Waits Time (cs) > > Wt > > Time > > -------------------------------------------- ------------ > > ------------ ----- > > -- > > slave wait 66,593 > > 6,793,939 > > 88.85 > > PX Deq: Execution Msg 28,960 > > 407,167 > > 5.33 > > PX Deq: Table Q Normal 19,864 > > 302,480 > > 3.96 > > PX Deq Credit: send blkd 3,685 > > 123,671 > > 1.62 > > PX Deq: Signal ACK 3,214 > > 5,294 > > .07 > > > > > > I have a pretty good idea that 2-5 are for parallel query option, > > although I > > still have to figure out just what they mean. > > > > > > Any help would be greatly appreciated. > > -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Deshpande, Kirti 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).
