ADDM Reports bug:Significant virtual memory paging was detected on the host operating system

查看ADDM（数据库版本为ORACLE 10.2.0.5.0）报告时，发现其中有个结论非常不靠谱：Significant virtual memory paging was detected on the host operating system，具体内容如下所示：

FINDING 2: 100% impact (3930 seconds)

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Significant virtual memory paging was detected on the host operating system.

   RECOMMENDATION 1: Host Configuration, 100% benefit (3930 seconds)

      ACTION: Host operating system was experiencing significant paging but no

         particular root cause could be detected. Investigate processes that

         do not belong to this instance running on the host that are consuming

         significant amount of virtual memory. Also consider adding more

         physical memory to the host.

使用nmon监控并没有发现消耗大量虚拟内存（virtual memory），搜索了一下，发现这个是一个bug导致。ORACLE 10g， ORACLE 11都有出现这个问题.

官方ADDM Reports Significant Virtual Memory Paging on Linux When None is Occurring (文档 ID 1322964.1)介绍如下所示

SYMPTOMS

After upgrading the database to 10.2.0.5, the ADDM report on Linux operation system may include findings on "Significant virtual memory paging":

There is no evidence at OS level of any problem with virtual memory paging. To verify that you are not really observing a memory problem, look at an operating system memory tool, such as vmstat:

Note: Under swap, si and so show a value of 0.
As above, if there are no abnormal figures and you are still seeing this warning, you might me hitting this problem

CAUSE

This issue can be seen from 10.2.0.5 to 11.2.0.2

ORACLE 10.2.0.5 可以通过下载补丁补丁程序12347332: TRACKING BUG TO FIX ADDM INCORRECTLY REPORTING PAGING ON 10.2.0.5解决这个Bug