Re: Address not mapped to object

lsllcm wrote:
> I have a system, oracle 9.2.0.4, linux ras4, 4g mem, 32 bit
>
> I enable Using Very Large Memory (VLM) in linux ras4 to use >1.7 g mem.
>
> run the following command on linux system
> # umount /dev/shm
> # mount -t ramfs ramfs /dev/shm
> # chown oracle:dba /dev/shm
>
> Add the following parameter into init.ora file.
> use_indirect_data_buffers=true
>
> Then I enable asyno
> 1. I patch 9204 using metalink Note:279069.1. for Asynchronous I/O
> Support
> 2. Enable oracle
> su - oracle
> $ cd $ORACLE_HOME/rdbms/lib
> $ make -f ins_rdbms.mk async_on
> $ make -f ins_rdbms.mk ioracle
>
> 3. Add parameters
> disk_asynch_io=true
> filesystemio_options=asynch
>
> Now I enable vlm and asynchronous
>
> When I run the command
> SQL> exec statspack.snap;
>
> In alert log file
> "Errors in file /oracle/admin/pftest/udump/pftest_ora_26698.trc:
> ORA-07445: exception encountered: core dump [00B03540] [SIGSEGV]
> [Address not mapped to object] [0x1] [] []"
>
> In the trace file
> *** SESSION ID:(10.12) 2006-10-04 16:20:34.118
> Exception signal: 11 (SIGSEGV), code: 1 (Address not mapped to object),
> addr: 0x
> 1, PC: [0xb03540, Cannot find symbol in /usr/lib/libaio.so.1.0.0.
> 00B03540]"
>
> But when set the parameter use_indirect_data_buffers=false; and the
> error disappear. Could you help on this one?
>
> Thanks in advance!
>

Did you look this up on Metalink? There are number of issues with use_indirect_data_buffers=TRUE, some of which are fixed in the 9.2.0.7 or 9.2.0.8 patchset.

HTH,
Brian

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Brian Peasland
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