We use LiveReorg here and have had a few problems. When it works, it works
very well and when it breaks it can hose your database. It does invalidate
some objects and you will need to manually recompile them if you don't tell
it to do it for you. Since some objects are invalidated because of
dependencies you may have to recompile some anyway. Obviously any that
depend on a private database link cannot be compile by LiveReorg.
Now, on to the problems. Even though the advertised special is that you can
run it in the middle of the day with thousands of users logged on with no
interruption it is not completely true. We have given up and only use it
after-hours, even in LiveReorg mode. The problem is that it can sometimes
fail when it can't exclusively lock everything that is associated with one
table. So if you have foreign keys referencing the table and the table has
foreigns keys into other tables you will have problems if somebody has a
table lock. Sometimes I think DDL locks cause problems too.
When the script blows up it will leave triggers out there that let everyone
know that a LiveReorg is "in progress" so you will start getting phone calls
right away. Believe me, the first time it happened to me I think I actually
lost five pounds from sweating the entire two hours it to me to straighten
the problems out. Eventually I was able to drop the triggers and create the
missing grants from the LiveReorg script I had saved.
My advice is to be very careful when evaluating the effects of LiveReorg. I
moved 300+ tables from one tablespace to another on Q/A and everything went
fine because there were very few users logged in. We have 25 or so more
tables to go in prodution and I wrote all of the DDL myself just because I
have lost faith in LiveReorg. We have another DBA that has used it in
Oracle Applications with very much the same problems.
Good luck.
--Michael
-----Original Message-----
Sent: Friday, June 15, 2001 1:33 PM
To: Multiple recipients of list ORACLE-L
Space Manager is an "offline" tool -- It creates a script that will create a
new table, populate it, and replace the old table with it, and during this
time the table is not accessible.
Live Reorg only has a "very short" window where the table is locked -- Quest
says a few seconds -- while the table is reorg'd. And, while I haven't used
it, I'm guessing that Live Reorg will not invalidate objects (like triggers)
that have a dependency on the table being reorg'd, unlike Space Manager's
brute force method.
Space Manager 3 is OK. v4 should be much nicer once it's out of beta (read:
more stable). There are enough major bugs in v4 (easy to reorg a 500K index
to a 500M index) that I'm going to wait for an "official" version. :)
Bottom Line:
Space Manager: Cheap, but needs downtime.
Live Reorg: Expensive, but no real downtime.
TS Reorg: Now owned by CA, so I probably won't even look at it. :)
Good luck!
Rich Jesse System/Database Administrator
[EMAIL PROTECTED] Quad/Tech International, Sussex, WI USA
-----Original Message-----
Sent: Friday, June 15, 2001 12:11
To: Multiple recipients of list ORACLE-L
Sun Sparc Solaris 2.6/8
Oracle DB 8.0.6, 8.0.5
Oracle Apps 11.0.3
My client and I are currently planning on re-orging some of our database -
say about 90G out of a 120G database (2 schemas). We've identified 3
tools and are seeking feedback on the pros/cons of each option.
....
anyone?
Also, can anyone explain the difference between Space Manager and Live
ReOrg? Both are marketed by Quest, making me wonder what, if anything, is
the difference...
TIA
J
--
Please see the official ORACLE-L FAQ: http://www.orafaq.com
--
Author: Jesse, Rich
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: Jenkins, Michael
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).
