status = 4031-ORA-04031: unable to allocate 12312 bytes of shared memory ("shared pool","unknown object","KKSSP^422","kglseshtTable")).

查一下當前shared pool的大小

select sum(bytes)/1024/1024 mb from v$sgastat where pool='shared pool';

解決辦法：

用如下命令修改SGA_MAX_SIZE與SGA_TARGET的值，調大一些，比如調整為5G，資料庫正常。

SQL> alter system set sga_max_size=5G  scope=spfile; 
SQL> alter system set sga_target=5G  scope=spfile;