ORA-12804: parallel query server appears to have died

文档解释

ORA-12804: parallel query server appears to have died

Cause: Cannot find process information for a parallel query server thread.

Action: Check your system for anomalies and reissue the statement. If this error persists, contact Oracle Support Services.

官方解释

正常处理方法及步骤

• 检查数据库并行服务器配置是否正确。

• 重建索引并平衡树形结构。

• 避免在全表扫描期间插入记录。

• 增加内存及重建I/O系统。

• 关闭自动并行查询服务器，然后重新开启。

• 运行database analyzer来识别底层操作。

• 把它设置为慢查询，并使用一些索引来加速查询。