本地建RAC，用dbca执行的时候，遇到错误。节点1的起来了，节点2不行。

Copying database files
DBCA_PROGRESS : 1%
DBCA_PROGRESS : 3%
DBCA_PROGRESS : 9%
DBCA_PROGRESS : 15%
DBCA_PROGRESS : 21%
DBCA_PROGRESS : 30%
Creating and starting Oracle instance
DBCA_PROGRESS : 32%
DBCA_PROGRESS : 36%
DBCA_PROGRESS : 40%
DBCA_PROGRESS : 44%
DBCA_PROGRESS : 45%
DBCA_PROGRESS : 48%
DBCA_PROGRESS : 50%
Creating cluster database views
DBCA_PROGRESS : 52%
DBCA_PROGRESS : 70%
Completing Database Creation
DBCA_PROGRESS : 73%
DBCA_PROGRESS : 76%
DBCA_PROGRESS : 85%
PRCR-1079 : Failed to start resource ora.aa.db
CRS-5017: The resource action "ora.aa.db start" encountered the following error:
ORA-27102: out of memory
Linux-x86_64 Error: 28: No space left on device
. For details refer to "(:CLSN00107:)" in "/u00/app/11.2.0/grid/log/aab2/agent/crsd/oraagent_oracle/oraagent_oracle.log".

CRS-2674: Start of 'ora.aa.db' on 'aab2' failed
CRS-2632: There are no more servers to try to place resource 'ora.aa.db' on that would satisfy its placement policy
DBCA_PROGRESS : 94%
DBCA_PROGRESS : 100%
Database creation complete. For details check the logfiles at:

网上查了一下，是系统参数问题导致的。本地检查发现，两个节点的参数居然都不一致，不知道是哪位改了。修改，生效，重新执行。OK