Re: ORA-27102 on Startup

Did you set the oracle user's limits according to the docs ?

You can verify with ulimit -a

Cheers

stefan

On 3/28/07, William Wagman <wjwagman_at_ucdavis.edu> wrote:
>
> Greetings,
>
> I just upgraded one of our Linux boxes. It is now running 32-bit RHEL
> 2.6.9-42.Elsmp. The box has 16GB of memory. I installed 32-bit Oracle
> 10.2.0.3.0. I am encountering ORA-27102, out of memory errors when
> starting the database and I don't understand why. The kernel parameters
> are set correctly, I think...
> [root_at_willie ~]# /sbin/sysctl -a | grep sem
> kernel.sem = 250 32000 100 128
> [root_at_willie ~]# /sbin/sysctl -a | grep shm
> vm.hugetlb_shm_group = 0
> kernel.shmmni = 4096
> kernel.shmall = 2097152
> kernel.shmmax = 4294967295
> [root_at_willie ~]# /sbin/sysctl -a | grep file-max
> fs.file-max = 65536
> [root_at_willie ~]# /sbin/sysctl -a | grep ip_local_port_range
> net.ipv4.ip_local_port_range = 1024 65000
> [root_at_willie ~]# /sbin/sysctl -a | grep rmem_default
> net.core.rmem_default = 262144
> [root_at_willie ~]# /sbin/sysctl -a | grep rmem_max
> net.core.rmem_max = 262144
> [root_at_willie ~]# /sbin/sysctl -a | grep wmem_default
> net.core.wmem_default = 262144
> [root_at_willie ~]# /sbin/sysctl -a | grep wmem_max
> net.core.wmem_max = 262144
>
> With these init parameters (which work by the way on a 64-bit server
> with 64-bit oracle installed, same versions and only 10GB of memory) I
> encountered the ORA-27102 on startup...
>
> edrs.__db_cache_size=788529152
> edrs.__java_pool_size=33554432
> edrs.__large_pool_size=16777216
> edrs.__shared_pool_size=1275068416
> edrs.__streams_pool_size=16777216
> *.db_block_size=8192
> *.db_file_multiblock_read_count=16
> *.job_queue_processes=10
> *.open_cursors=300
> *.pga_aggregate_target=1560281088
> *.processes=300
> *.sga_max_size=3221225472
> *.sga_target=2147483648
>
> In order to start the database I had to change the parameters to this...
>
> edrs.__db_cache_size=50000000
> edrs.__java_pool_size=33554432
> edrs.__large_pool_size=16777216
> edrs.__shared_pool_size=250000000
> edrs.__streams_pool_size=16777216
> *.cursor_sharing='EXACT'
> *.db_block_size=8192
> *.db_file_multiblock_read_count=16
> *.job_queue_processes=10
> *.open_cursors=300
> *.pga_aggregate_target=25000000
> *.processes=300
> *.sga_max_size=250000000
> *.sga_target=250000000
>
> The one which seems to make the most difference is the sga_target
> parameter. This database was created by restoring an RMAN backup from
> the production server. So I am completely at a loss to explain why, on
> this box with more memory than the other I have to reduce the memory
> allocation in order to start the database. Any insight would be greatly
> appreciated.
>
> Thanks.
>
> Bill Wagman
> Univ. of California at Davis
> IET Campus Data Center
> wjwagman_at_ucdavis.edu
> (530) 754-6208
> --
> http://www.freelists.org/webpage/oracle-l
>
>
>

--
http://www.freelists.org/webpage/oracle-l