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ORA-04031: unable to allocate string bytes of shared memory (“string”,”string̶

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ORA-04031: unable to allocate string bytes of shared memory (“string”,”string̶

文档解释

ORA-04031: unable to allocate string bytes of shared memory (“string”,”string”,”string”,”string”)

Cause: More shared memory is needed than was allocated in the shared pool or Streams pool.

Action: If the shared pool is out of memory, either use the DBMS_SHARED_POOL package to pin large packages, reduce your use of shared memory, or increase the amount of available shared memory by increasing the value of the initialization parameters SHARED_POOL_RESERVED_SIZE and SHARED_POOL_SIZE. If the large pool is out of memory, increase the initialization parameter LARGE_POOL_SIZE. If the error is issued from an Oracle Streams or XStream process, increase the initialization parameter STREAMS_POOL_SIZE or increase the capture or apply parameter MAX_SGA_SIZE.

这是一个ORA-04031错误,指的是Oracle不能根据要求分配指定大小的共享内存。共享内存是一种分配给属于Oracle实例的内存,其中存储着针对某些操作时必要的信息,也用于Oracle实例间的连接。

官方解释

ORA-04031错误发生时,通常会有以下报错信息:Error:ORA-04031:无法在SHARED POOL中为“string”分配string字节(其中string是相应的内存池,用于存放相关信息或对象) 。

常见案例

因为共享内存池有限,ORA-04031错误通常发生在可用的共享内存空间不足的情况下。它还可能发生在共享内存池被破坏或被系统空间占用的情况下。

正常处理方法及步骤

(1)使用SHARED_POOL_SIZE参数对共享内存池进行扩充,释放更多的内存空间给你的Oracle实例使用。

(2)如果共享内存池已被占满,可以考虑使用Oracle提供的dbms_shared_pool.keep方法,将受important包缓存设置为保持,以便避免反复加载与重新分配空间。

(3)清理共享内存池中过期或无效的内存对象,以便释放出更多的空间给Oracle实例使用。

(4)确保归档日志切换运行正常,以便释放更多的内存给Oracle实例。

(5)如果是应用逻辑导致了内存空间不足,则可以考虑优化相关SQL脚本,并在竞争性查询及更新操作中添加事务控制器,以优化内存使用。

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ORA-04031: unable to allocate string bytes of shared memory (“string”,”string̶

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