Re: Collisions

HI Henrik

Tha database parameter CONVERTER_REGIONS = 8. Yes , I have backup at night and at noon with update statisctics following it.
I will cancel the noon task.

Should I increase the aprameter?

Best regards,

2007/7/11, Henrik Hempelmann <henrik@hempelmann.com>:
>
>
> On 11.07.2007, at 20:01, Daniel Castro wrote:
>
> > Hi,
> >
> > I get the following message:
> >
> > I CONV2: collision rate 4.17%, 351 collisions, 326 waits (3.87%),
> > 8425
> > accesses on region 6
> > CON: REGION_COLLISION_PERCENT[""] > 2
> > VAL: 4.17
> >
> > What is this "CONV2" region?
>
> Regions protect the internal data structures to prevent conflicts
> during concurrent access. CONV is for the converter, the mapping
> table between logical page numbers to physical block addresses on the
> data volumes. To reduce collisions on the converter, it's striped
> into a number of regions, usually 8 to 64 regions depending on the
> total size of the data area. So CONV2 is the second region out of a
> number of converter regions.
> For a short explanation have a look at the parameter CONVERTER_REGIONS.
> Are there any collisions on the other converter regions? Do you have
> I/O intensive tasks running in parallel - like data backup, check
> data or update statistics?
>
>
> Henrik
>
>
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