AIX 6100-07-04 or 6100-0705 bug：引起paging space使用率很高

如果你在使用AIX 6100-07-04 or 6100-0705，发现paging space使用率很高，那么你就有可能是中了AIX的一个bug：IV26272
下面的内容来自于IBM官方网站：
    Problem summary

    ****************************************************************
    * USERS AFFECTED:
    * Users of the AIX 6100-07 Technology Level with the vmo
    * tunable "numperm_global = 1" set.
    ****************************************************************
    * PROBLEM DESCRIPTION:
    * Paging of computational storage pages is occurring when a
    * high percentage of memory is being used for the file cache.
    ****************************************************************
    * RECOMMENDATION:
    * Install APAR IV26272.
    * Prior to APAR availability, interim fixes are available at:
    * ftp://public.dhe.ibm.com/aix/ifixes/iv26272/
    * IV26272s04 for 6100-07-04
    * IV26272s05 for 6100-07-05
    ****************************************************************

    Problem conclusion

    LRU processing changed to perform file only 4K page stealing
    when 64K page size is at maxpin condition and there are 4K file
    pages available to steal in the mempool.

    Temporary fix

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    * HIPER *
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