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  • Latest Post - ‏2013-06-14T14:22:56Z by amccarl
amccarl
amccarl
73 Posts

Pinned topic Paging space growth on DB2 AIX systems with 64K (medium) pages enabled

‏2013-06-12T21:27:39Z | db2 dbdsupport hivalue technical-article

Unexpected growth in paging space utilization might occur on a DB2 or AIX system where sufficient memory exists to keep DB2 application memory in RAM. This might be observed on DB2 or AIX systems using medium (64K) memory pages. While the performance effects from the paging itself should be negligible, paging space might become exhausted over time. This condition typically results in an outage, such as system hang or terminated applications.

Two AIX defects have been identified. This problem is resolved by AIX APAR IZ67445 - 64K PAGING TAKING PLACE WHEN AVAILABLE SYSTEM RAM EXISTS (affects AIX 5.3 and AIX 6.1). and AIX HIPER APAR IZ92561 - 64K KERNEL HEAP CAUSES PAGING WHEN RAM IS OTHERWISE AVAILABLE (impacts AIX 6.1 only).

This is covered in detail by the technical article 1417752  , http://www.ibm.com/support/docview.wss?uid=swg21417752

  • amccarl
    amccarl
    73 Posts

    Re: Paging space growth on DB2 AIX systems with 64K (medium) pages enabled

    ‏2013-06-14T14:22:56Z  
    Hello!  We've had a number of clients respond through feedback to our technical documents indicating that they have further questions or comments that require additional dialogue.  Unfortunately, our feedback is anonymous, so unless an email address or other contact information is included, we have no way to get back in touch with you.
     
    Within DB2 support, the management team asked if we could somehow link our documents to the forums so that we could invite more discussion - like this!   As a start, we chose about 30 technical articles and "seeded" the forum with initial entries so that we could have a starting place for conversation.  The documents have now been updated with links to the forums as well.  
     
    Hopefully, we will make DB2 support better by providing more interaction around our technical information!