dbca建库会无故的被弹出来或者HANG住。操作系统是32 bit的redhat as3，于是检查了ORACLE在该版本下的安装前提。检查软件包。
III. Environment:
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   1. The first, critical, environment item is related to the gcc v2.96 and g++ v2.96 RPMs that were
installed above. Run the following command (as the oracle account) to check the current gcc version...
         gcc -v
      If the command above returns any gcc version other than 2.96 or if the command fails, then run these commands as the root account:
         mv /usr/bin/gcc /usr/bin/gcc.orig
         mv /usr/bin/g++ /usr/bin/g++.orig
         ln -s /usr/bin/gcc296 /usr/bin/gcc
         ln -s /usr/bin/g++296 /usr/bin/g++
   If the "mv" (move) command lines above return an error, it only means that your system did not have a pre-existing /usr/bin/gcc or /usr/bin/g++ to rename.
   2. Required Environment Variables
      a.) LD_ASSUME_KERNEL=2.4.19
      b.) THREADS_FLAG=native, to avoid Bug 3523046, "REDHAT 3.0 - UNABLE TO CREATE DATABASE USING DBCA"
经过上述操作，并且在$ORACLE_HOME的bin下relink all之后，一切正常了。