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From Dmitriy Setrakyan <dsetrak...@apache.org>
Subject Re: Finished work on IGNITE-630 (Refactor GridMetadataAwareAdapter to use array)
Date Thu, 23 Jul 2015 17:28:00 GMT
On Thu, Jul 23, 2015 at 9:23 AM, Anton Vinogradov <avinogradov@gridgain.com>
wrote:

> Previously GridMetadataAwareAdapter used LeanMap to store entry's metadata.
> But LeanMap was not so lean as expected.
>

Thanks Anton! It looked pretty lean to me when I originally developed it :)


>
> I've created test (GridMetadataAwareAdapterLoadSelfTest) shows how much
> time and memory need to create 1_000_000 GridCacheMockEntry.
>
> Each case creates 1_000_000 entries and adds meta as described:
>
> LeanMap (initial implementation)
>
> all 10 keys [time=5140 ms, memory=940.3 mb]
>
> all 3 keys [time=1748 ms, memory=176.3 mb]
>
> first key only [time=968 ms, memory=97.9 mb]
>
> second key only [time=902 ms, memory=97.9 mb]
>
> third key only [time=953 ms, memory=97.9 mb]
>
> tenth key only [time=988 ms, memory=97.9 mb]
>
> random (1-3) key [time=1041 ms, memory=97.9 mb]
>
> no meta [time=276 ms, memory=39.1 mb]
>
> first key is random UUID, second is random UUID too and so on...
>
>
> I've changed LeanMap to regular array and gain these results:
>
> all 10 keys [time=1410 ms, memory=78.6 mb]
>
> all 3 keys [time=801 ms, memory=39.3 mb]
>
> first key only [time=636 ms, memory=39.3 mb]
>
> second key only [time=722 ms, memory=39.3 mb]
>
> third key only [time=750 ms, memory=39.3 mb]
>
> tenth key only [time=765 ms, memory=78.6 mb]
>
> random (1-3) key [time=664 ms, memory=39.3 mb]
>
> no meta [time=173 ms, memory=19.6 mb]
>
> first key is 0, second is 1 and so on...
>
> Currently maximum key index used to create meta is 2, so results should be
> compared at "all 3 keys", "third key only" and "no meta" cases.
>
> So, extra costs was reduced.
>

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