【BUG】Kewastunpackstats(): Bad Magic 1 (0x。。。。, 0)

Applies to:

Oracle Server - Enterprise Edition - Version: 9.2.0.8 and later [Release: 9.2 and later ]

Information
in this document applies to any platform.

Kewastunpackstats(): Bad Magic 1 (0x1108f7b87, 0)
in Alert Logfile After Upgrading to 11.2.0.1

Symptoms

The following message is reported
in the instance alert
file:

kewastUnPackStats(): bad magic 1 (0x1108f7b87, 0)

Cause

The cause of this problem has been identified
in Bug:8967729
which has been closed


as duplicate of unpublished bug 8730312.It is caused by the variable part of


the Active Session History rows (the moduile, action program, etc. information)


not being stored properly, causing any
read-back of this data through views like


(G)V$ACTIVE_SESSION_HISTORY to fail.

Solution

The issue has been fixed
in the upcoming Oracle12c release and the 11.2.0.2 and higher patchsets.


The solution is to
install the 11.2.0.3 patchset


(which
is the current patchset at time
of publishing this Note (MAR-2012).

Apply Patch:8730312
for any other environments.

As one-off patches are not subjected to the same rigorous level of testing as
done

for
Oracle Server patch sets, you are encouraged to install
and test
this patch

in
a test environment prior to full production implementation.