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SWAP/PASSING Memory is not working properly

  • 1.  SWAP/PASSING Memory is not working properly

    Posted Thu December 23, 2010 12:02 AM

    Originally posted by: SystemAdmin


    Dear all,
    We are using oracle weblogic 10.3.2 application on AIX 6.1.4 (power 6). Oracle weblogic 10.3.2 application use only real memory (RAM) upto 100% & Real memory (RAM) be come 100% utilization state but SWAP memory still became unused.

    We use topas command to monitoring that activities.
    #AIX-Forum


  • 2.  Re: SWAP/PASSING Memory is not working properly

    Posted Mon January 03, 2011 07:44 AM

    Originally posted by: nagger


    This is normal AIX behaviour.

    If there is no need to page memory to the paging space then it will not and it now only allocates pages as needed. This is called late allocation = only when actually needed.

    Many years ago AIX use to allocate pages in advance. This was important on machines with little memory as it can save time in an emergency but with very fast CPUs and much larger memory in modern machines it is actually a waste of CPU cycles to pre-allocate the space.

    Does that answer your question? thanks Nigel Griffiths
    #AIX-Forum


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