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From Vladimir Ozerov <voze...@gridgain.com>
Subject Re: memory-only mode for Ignite indexes
Date Mon, 07 May 2018 14:42:38 GMT
Agree.

On Mon, May 7, 2018 at 5:20 PM, Dmitriy Setrakyan <dsetrakyan@apache.org>
wrote:

> On Mon, May 7, 2018 at 2:09 AM, Vladimir Ozerov <vozerov@gridgain.com>
> wrote:
>
> > Hi Dima,
> >
> > Update with indexes would definitely be slower than update without them.
> > The question is how much slower. For now the slowdown comes mostly from
> > excessive data page reads ([1] and [2] in my previous email) leading to
> > page evictions and additional IO. To the contrast, usually only a single
> > page write is needed to update an index. Correct index implementation
> ([1]
> > and [2] from previous email) would eliminate data page reads altogether
> and
> > should give dramatic speedup.
> >
>
> Sounds great. The changes you are suggesting should give us a great
> performance boost. Hopefully they should not take too long to implement.
>
> Regardless, once you are done, we should still perform a benchmark with
> persistence indexes vs memory-only indexes. If memory-only will be more
> than 20% faster, we should still implement it.
>
> D.
>

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