vm.min_free_kbytes = 2147484 参数，这几个机器都是512的内存。

主备库创建pfile文件

create pfile='/tmp/pfile0808.ora' from spfile;

备库取消应用日志

alter database recover managed standby database cancel;---取消应用

主库执行变更参数语句

alter system set sga_target=270G scope=spfile sid='*';

alter system set pga_aggregate_target=90G scope=both sid='*';

shutdown immediate

 

--回退---

startup pfile='/tmp/pfile0808.ora';
create spfile from pfile='/tmp/pfile0808.ora';

shutdown immediate

startup

备库应用日志

alter database recover managed standby database using current logfile disconnect from session;

Best Practices and Recommendations for RAC databases with SGA size over 100GB (文档 ID 1619155.1)