RESOLUTION: LogMiner Hanging

  • From: "Mark Strickland" <strickland.mark@xxxxxxxxx>
  • To: oracle-l@xxxxxxxxxxxxx
  • Date: Mon, 23 Apr 2007 09:48:53 -0700

I found a resolution to my LogMiner hanging issue.  I was using the data
dictionary in my Logical Standby database for mining the logs since that
database receives the Production archived logs.  My Logical Standby database
is configured to skip some of the Production schemas, so its data dictionary
is not in sync with Production regarding those schemas.  I guess that,
occasionally, LogMiner encountered an inconsistency that it couldn't get
past.  I built a new dictionary flat file from Production and used that
instead of the Logical Standby data dictionary and LogMiner was able to mine
all of the archived logs successfully.  I would have expected LogMiner to
either just skip over the redo records that it couldn't handle or at least
report an error rather than hang.  I've reported this to Oracle Support.

Mark Strickland

---------- Forwarded message ----------
From: Mark Strickland <strickland.mark@xxxxxxxxx>
Date: Apr 20, 2007 8:17 AM
Subject: LogMiner Hanging
To: oracle-l@xxxxxxxxxxxxx

Oracle RAC, DataGuard, RMAN; Solaris 9; Veritas, Hitachi SAN

I recently implemented LogMiner to use as a low-impact just-in-case auditing
tool and to get exact transaction counts for month-end reporting.  Every
morning at 2:00 a.m., I mine the previous day's Production logs and my
script produces an HTML report for each hour of the day showing all the
transactions for that hour.  Groovy, EXCEPT, over the last 19 days that I've
been mining the logs, there have been 3 days where there was at least one
log that caused LogMiner to hang, never to be heard from again.   If I don't
log can be read.  If I include either of those columns, LogMiner hangs and I
have to snipe the SQL*Minus session and its associated shadow process.  At
least I can get transaction counts, but I also want the SQL.  I searched the
usual haunts online and opened an SR.  Oracle Support has been able to
duplicate the problem using one of the logs that I sent them.  Interesting
thing is that those same logs are mined successfully by a Logical Standby
database beforehand.  Just wondering if anyone out that has had a similar
experience and if there was a cause/resolution.  Thx!

Mark Strickland
Seattle, WA

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