(2011?02?10? 08:37), Rich Megginson wrote:
On 02/10/2011 09:32 AM, Reinhard Nappert wrote:
> Hi,
> I noticed that the search performance increased quite a bit with
> 1.2.6/1.2.7.5, compared to 1.1.2.
> I did a rather simple test, where I randomly searched objects from a
> small database with about 25.000 objects. I assume that those objects
> are cached.
> The tests were performed on a 2 Dual CPU (1.8 GH clock speed) box
> with 16 GB RAM.
> I did perform 7.000.000 searches with 7 threads (1.000.000 searches
> per thread). Both directory instances were configured in exactly the
> same way.
> I got 5630 searches/sec for the 1.2.7.5 directory instance, whereas
> I got 6890 searches/sec for the 1.1.2 directory instance.
> I was wondering what the reason for the performance decrease is.
Could be the entryrdn (subtree rename) support. Not sure. You could
try disabling that.
Or since the DB is small, you could run the search performance
test
after putting all entries on the entry cache. If you see the
competitive result, the cause should be entryrdn.
If you are disabling entryrdn, you have to do export the DB to an ldif
file, disable entryrdn, then import the ldif file back. (Sorry, there
is no backward tool.)
> Thanks,
> -Reinhard
>
>
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