Database Unexpectedly Hung Due To An ORA-07445 [PC:0x7C810A5B] [ACCESS_VIOLATION] [ADDR:0x6A590420] [PC:0x7C810A5B] [UNABLE_TO_READ]

(Doc ID 1341681.1)

Last updated on NOVEMBER 28, 2016

Applies to:

Oracle Database - Enterprise Edition - Version to [Release 11.1 to 11.2]
z*OBSOLETE: Microsoft Windows Server 2003 R2 (32-bit)
***Checked for relevance on 22-Feb-2013***


On on MS Windows 32-bit the following error appears in the alert.log preventing users from accessing the database.

ORA-07445: exception encountered: core dump [PC:0x7C810A5B] [ACCESS_VIOLATION] [ADDR:0x6A590420] [PC:0x7C810A5B] [UNABLE_TO_READ] []


At the top of the trace file, below the banner, the memory use is printed out:

Memory (Avail/Total): Ph:3004M/8190M, Ph+PgF:4269M/10035M, VA:34M/3007M 


An increase in workload occurred around the time of the errors.


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