How long does it run before you get the ora-1555 message? On Tue, Jul 14, 2009 at 5:04 PM, Nancy Iles <nancy_iles@xxxxxxxxxxx> wrote: > > Yes, the there is an index on CONFIRMATION_NO and I have found that > _OPTIM_PEEK_USER_BINDS=FALSE on all 6 RAC nodes. So, now on to research the > other suggestions! Thanks to everyone for your input. > > Nancy > > ________________________________ > > From: jkstill@xxxxxxxxx > > Date: Tue, 14 Jul 2009 08:56:04 -0700 > > Subject: Re: Undo Usage and Read consistency - ORA-1555 > > To: nancy_iles@xxxxxxxxxxx > > CC: cicciuxdba@xxxxxxxxx; oracle-l@xxxxxxxxxxxxx > > > > On Tue, Jul 14, 2009 at 8:35 AM, Nancy Iles> wrote: > > > > > > > > > > We have sporadic ora-1555 on an exceptionally simple statement that > occurs frequently in the application. How can you analyze why this tiny, > simple statement is causing an ORA-1555? The statement is: > > > > > > > > SELECT RESV_NAME_ID , RESORT FROM RESERVATION_NAME WHERE CONFIRMATION_NO > = :1 > > > > > > > > Is an appropriate index being used by the SELECT? > > > > Normally I would expect to see something such as CONFIRMATION_NO to > > be accessed via indexed lookup, but it doesn't hurt to confirm that. > > > > > > > > Barring that, have you tried running a 10046 trace on that statement so > > you can see what is taking place to satisfy the query? > > > > Lots of guessing here, because there isn't really much to go on in this > post. > > > > > > > > Jared > > > _________________________________________________________________ > Lauren found her dream laptop. Find the PC that’s right for you. > http://www.microsoft.com/windows/choosepc/?ocid=ftp_val_wl_290-- > //www.freelists.org/webpage/oracle-l > > > -- Andrew W. Kerber 'If at first you dont succeed, dont take up skydiving.'