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NMON : Page scan:free ratio

  • 1.  NMON : Page scan:free ratio

    Posted 09/01/14 03:51 AM

    Originally posted by: Mohammed Farooqui


    On one of our production Data base, hosting oracle DB, the Page scan:free ratio  reaches about 200. 

    Does this mean that there is memory issue. However the Pi and Po have nothing to show and the Paging space also is just 1% utilized.

    We have not configured any concurrent I/O. It still have the default setting.   Is this normal as many places I read that Page scan:free ration should not increase more than 7 - 8

    The lruable pages are only Filesystem cache pages as per the vmo settings. 


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