On 18Sep07, at 5:39 PM, Lance Norskog wrote:
> Hi
>
> In early June Mike Klass posted a formula for the number of file
> descriptors
> needed by Solr:
>
> For each segment, 7 + num indexed fields per segment.
> There should be log_{base mergefactor}(numDocs) * mergeFactor
> segments, approximately.
>
> Is this still true?
No, it is a constant ~10 files per segment now (no perfield file
descriptor count).
Unfortunately, I forgot that a set of file descriptors is needed for
each Reader  so multiply the total by 2 at least.
The formula's seeming mathematical nature shouldn't be confused for
precision: I wouldn't use it for anything other than an ordermag
level estimation of the number of fds needed.
Mike
