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From Kiran Ayyagari <kayyag...@apache.org>
Subject Re: Index branch status ...
Date Fri, 27 Apr 2012 16:40:08 GMT
You DID it, bravo :)

On Fri, Apr 27, 2012 at 9:07 PM, Emmanuel L├ęcharny <elecharny@gmail.com> wrote:
> Hi guys,
>
> so this is the end of the week, and I have done some experiments with my
> Index branch (this branch has been created to remove the oneLevel and
> subLevel index, and to use the RdnIndex instead).
>
> First of all, the server is working just fine without those two indexes. I
> still have on-going improvements to get the full advantage of those removal
> (currently, we have some issues with JDBM when we want to update the keys to
> stoe the number of children/descendant each entry has, but this is something
> we are discussing atm), but baseline, the perfs are pretty much on par with
> trunks.
>
> That includes searches, not only modifications.
>
> Today, I did some profiling with the latest version of Yourkit, and I was
> able to tweak the server here and there to get some speed improvement. Here
> are the results I get :
>
> on Trunk :
>
> OBJECT level search, 19 680 entries returned per second (we only get one
> entry)
> ONE level search, 27 900 entries returned per second (we get five entries)
> SUBTREE level search, 17870 entries returned per second (we get 10 entries)
>
> Keep in mind that those tests are done with an embedded server, it does not
> go through any network layer. So to speak, it gives the raw caacity of the
> server to deliver entries, no more.
>
> On the branch now :
> OBJECT level search, 33 373 entries returned per second (we only get one
> entry) : this is a 70% improvement !
> ONE level search, 45 695 entries returned per second (we get five entries):
> this is a 63% improvement !
> SUBTREE level search, 35 300 entries returned per second (we get 10
> entries): this is a 97% improvement !!!
>
> I'm quite confident that we can still improve the performances of the
> server, I have just scratched the surface here :)
>
> More to come soon !
>
> --
> Regards,
> Cordialement,
> Emmanuel L├ęcharny
> www.iktek.com
>



-- 
Kiran Ayyagari

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