今天在DELL服务器的Redhat 6.4上安装Oracle10.2.0.4,用sqlplus 登陆数据库，会出现如下的提示：
map size mismatch; abort: Success，不过其他的功能都正常，只是有这个提示
解决方法：
alter system set "_enable_NUMA_optimization"= false scope=spfile;
alter system set "_db_block_numa"=1 scope=spfile;
SQL>shutdown immediate
SQL>startup
col name for a40
col value for a40
col describ for a40
set linesize 130
NUMA是CPU的一种技术，开启需要硬件的支持，关于这两个参数的解释：
SELECT x.ksppinm NAME, y.ksppstvl VALUE, x.ksppdesc describ
FROM SYS.x$ksppi x, SYS.x$ksppcv y
WHERE x.inst_id = USERENV ('Instance')
AND y.inst_id = USERENV ('Instance')
AND x.indx = y.indx
AND upper(x.ksppinm) like '%NUMA%';
NAME VALUE DESCRIB
---------------------------------------- ---------------------------------------- ----------------------------------------
_rm_numa_sched_enable FALSE Is Resource Manager (RM) related NUMA sc
heduled policy enabled
_NUMA_pool_size Not specified aggregate size in bytes of NUMA pool
_enable_NUMA_optimization TRUE Enable NUMA specific optimizations
_NUMA_instance_mapping Not specified Set of nodes that this instance should r
un on
_rm_numa_simulation_pgs 0 number of PGs for numa simulation in res
ource manager
NAME VALUE DESCRIB
---------------------------------------- ---------------------------------------- ----------------------------------------
_rm_numa_simulation_cpus 0 number of cpus per PG for numa simulatio
n in resource manager
_db_block_numa 2 Number of NUMA nodes
7 rows selected.
