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  1. #1
    Join Date
    Sep 2005
    Posts
    1

    Question Unanswered: Fewer Fast CPU x more Slow CPU - best ?

    Please,

    Anyone has experience that share with me ?
    We migrated from a system with 24 cpus (capable of 220K tpmC estimated) to a much faster 12 cpu (400KtpmC estimated) system keeping UNIX/IDS versions AIX 5.2 and IDS 7.31.
    But we are not seem such difference ! Initially the response time came down, but the cpu utilization is at the same levels before. And getting worst overtime.

    Is there any rule of the thumb regarding the number of cpus for Informix ?
    Anyone know if for Informix is better you have as many cpus as you can ?

    Thanks for your attention

    Tony

  2. #2
    Join Date
    Jun 2004
    Location
    Madrid, Spain
    Posts
    47
    I've seen great improvements when moving to faster CPUs... using IBM Redbrick.

    Suppose you tuned your parameters accordingly.
    José Luis Matute.

    Regards from Spain.

  3. #3
    Join Date
    Aug 2003
    Location
    Argentina
    Posts
    780
    Hi,
    Please check with command sar, iostat, onstat -g iof and so on, for look bottleneck.

    Gustavo.

  4. #4
    Join Date
    Sep 2002
    Posts
    102
    Have you run an update statistics lately?

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