Database Unexpectedly Hung Due To An ORA-07445 [PC:0x7C810A5B] [ACCESS_VIOLATION] [ADDR:0x6A590420] [PC:0x7C810A5B] [UNABLE_TO_READ]
Last updated on NOVEMBER 28, 2016
Applies to:Oracle Database - Enterprise Edition - Version 220.127.116.11 to 18.104.22.168 [Release 11.1 to 11.2]
z*OBSOLETE: Microsoft Windows Server 2003 R2 (32-bit)
***Checked for relevance on 22-Feb-2013***
On 22.214.171.124 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.
Sign In with your My Oracle Support account
Don't have a My Oracle Support account? Click to get started
My Oracle Support provides customers with access to over a
Million Knowledge Articles and hundreds of Community platforms