Question for the group. Does IDS 9.4 priority age long running
sessions inside the database engine? I know you can set the NOAGE
parameter to keep the OS from aging the oninit processes when they are
scheduled on the physical CPUs. But does IDS age any of the user
sessions when scheduling them onto the CPUvps?

I ask this because I have a daemon process that gets really slow after
several days. The OS ages the process about 20% (nice 20 to 24). But
when I stop and restart the process it gets more than 20% faster again.
More like 200%.

There is pleanty of idle CPU when it gets slow and no I/O waits.

Love to hear peoples thoughts.

Corey

AIX 5.3-TL4
IDS 9.4 FC6

I don't think the engine does anything like that. The poor performance
has to be caused by something else.

Could the OS aging of your daemon process be causing the problem even
if there appears to be pleny of CPU cycles available?

Andrew

cgates wrote:
> Question for the group. Does IDS 9.4 priority age long running
> sessions inside the database engine? I know you can set the NOAGE
> parameter to keep the OS from aging the oninit processes when they are
> scheduled on the physical CPUs. But does IDS age any of the user
> sessions when scheduling them onto the CPUvps?
>
> I ask this because I have a daemon process that gets really slow after
> several days. The OS ages the process about 20% (nice 20 to 24). But
> when I stop and restart the process it gets more than 20% faster again.
> More like 200%.
>
> There is pleanty of idle CPU when it gets slow and no I/O waits.
>
> Love to hear peoples thoughts.
>
> Corey
>
> AIX 5.3-TL4
> IDS 9.4 FC6

You of course set the NOAGE parameter, don't you? (I couldn't quite
tell from your post.)
cgates wrote:
> Question for the group. Does IDS 9.4 priority age long running
> sessions inside the database engine? I know you can set the NOAGE
> parameter to keep the OS from aging the oninit processes when they are
> scheduled on the physical CPUs. But does IDS age any of the user
> sessions when scheduling them onto the CPUvps?
>
> I ask this because I have a daemon process that gets really slow after
> several days. The OS ages the process about 20% (nice 20 to 24). But
> when I stop and restart the process it gets more than 20% faster again.
> More like 200%.
>
> There is pleanty of idle CPU when it gets slow and no I/O waits.
>
> Love to hear peoples thoughts.
>
> Corey
>
> AIX 5.3-TL4
> IDS 9.4 FC6