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2 Replies Latest reply: Jul 17, 2012 1:35 PM by 949670 RSS

Endeca Mdex Engine Performance after the baseline completion

949670 Newbie
Currently Being Moderated
Hi,

Is there any information in Oracle Endeca help, that talks about performance right after a baseline refresh? It always seems like it’s bad, and then it gets fine.
Could anyone provide information why it is happening?

Thanks
Ganesh

Edited by: 946667 on Jul 16, 2012 7:39 AM
  • 1. Re: Endeca Mdex Engine Performance after the baseline completion
    pete f - oracle Newbie
    Currently Being Moderated
    Ganesh,

    The cache is flushed as a part of the baseline update. The cache then needs to be warmed to a steady state again, this is discussed in more detail in the Performance and Tuning guides
    http://docs.oracle.com/docs/cds/E28910_01.zip

    Warming performance vs. steady state performance
    When a Dgraph starts, its performance will gradually increase until it reaches a steady state. This
    process is known as Dgraph warming.
    It is important to distinguish between the warming performance of the Dgraph and the steady state
    performance. Many of the techniques discussed in this guide address either one or the other, while
    others address both types of performance diagnostics and optimization.
    The following considerations apply specifically to diagnosing and optimizing the warming performance
    of the Dgraph:
    • Disk I/O problems can sometimes cause slow warming.
    • It is helpful to run a Dgraph warming script at startup. For example, you can use a request log of
    characteristic queries played against the Dgraph to help warm it to a steady state.


    Cheers,
    Pete
  • 2. Re: Endeca Mdex Engine Performance after the baseline completion
    949670 Newbie
    Currently Being Moderated
    Thanks Pete.

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