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- Path: sparky!uunet!cis.ohio-state.edu!zaphod.mps.ohio-state.edu!uwm.edu!ogicse!emory!oregon.wvus.org
- From: sford@oregon.wvus.org (Scott Ford)
- Newsgroups: comp.databases.informix
- Subject: Physical and Logical Recovery (fwd)
- Message-ID: <9403@emory.mathcs.emory.edu>
- Date: 26 Aug 92 23:18:05 GMT
- Article-I.D.: emory.9403
- Sender: walt@mathcs.emory.edu
- Reply-To: sford@oregon.wvus.org (Scott Ford)
- Lines: 38
- X-Informix-List-ID: <list.1404>
-
- According to Naomi Walker:
- >
- > The Informix log shows that OnLine was initialized, Physical recovery
- > started, and completed, restoring 648 pages. For six hours after
- > that, dots flew across the screen, over and over and over again.
- > It appeared to be reading, maybe something again and again. Logical
- > Recovery never completed. The engineer on site finally aborted the
- > logical recovery and restored via archives (owwwwww!).
- >
- > I remember when 4.0 had a problem in recovery when the logs were filled,
- > and it looked the same way. One time, Informix was able to patch
- > something it looked like there was nothing in the Logical logs, and the
- > system came back up.
- >
- If it's not the age old log problem, perhaps it is what we recently
- encountered. We were building (correction, attempting to build) an index
- on a very large table (no transactions in db - don't even think about
- that for an index build like this). For an unrelated reason, the machine
- crashed. Upon recovery, physical recovery was done quickly and logical
- (i.e. "*fast*") recovery took 20 hours.
-
- It turns out that this is a bug fixed under 4.10.UF (or UG or UH, not
- sure) regarding the way a create index rollback is handled. The reason I
- don't know the level is that we're 4.10.UD and are currently working on
- installing 5.0, so I've no compunction to get the upgraded 4.1 at this
- juncture -- might want to check with your Informix contact..
-
- If it's not this nor the infamous, "sorry your logs are already full"
- problem, we haven't encountered it.
-
-
- Scott Ford, DBA | sford@wvus.org
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