The following can also be used in place of EXIST:besides EXIST, any other command can be used at that particular point?
ANY
ALL
IN
NOT EXISTS
Larry Siemer hasn't added any friends yet.
30 September 2004 - 12:14 PM
The following can also be used in place of EXIST:besides EXIST, any other command can be used at that particular point?
29 September 2004 - 11:11 AM
Then nothing 'EXISTS'.
by the way, what happend if my nested IF block returns no data?
26 July 2004 - 01:01 PM
Joseph,Joseph,
I followed this up and I found some of my old reference materials that say "the database can freeze [...] whenever LGWR is forced to wait for an inactive redo log group to become available for reuse".
I also found some recommendations I once collated for 24x7 Oracle systems that strongly suggest such systems should have "extra" monitoring in place to detect failures in the redo log archiving process - precisely because of its impact on database availability.
Is there any way you can find out if the automated redo log archiving had likely failed when you had your problem? Maybe from timestamps on the archived copies at the archive destination?
Incidentally, for very-high-throughput systems, archiving via a network or comms link can be an issue because the database may be able to create online logs (at local-disk bandwidth) faster than they can be archived. That's very unlikely to be the case with 'normal' applications though.
Also, FWIW, I never used to set production systems up with less than five online log groups.
Regs, Richard
21 April 2004 - 01:43 PM
25 June 2003 - 04:50 PM