Oracle 11G Rac集群诡异的表空间不足

一、起因

有一套Oracle 11GR2数据库集群,表空间大概是400G,每次都是表空间使用到47%左右报错,

ORA-12801: error signaled in parallel query server P003, instance : (1) ORA-01658: unable to create INITIAL extent for segment in tablespace XXXX,