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From Elliott Clark <ecl...@apache.org>
Subject Re: Multiple region servers per physical node
Date Tue, 30 Jul 2013 06:34:37 GMT
G1 doesn't really make our write path much better if you have uneven
region writes (zipfian distribution or the like).
Lately I've been seeing the memstore blocking size per region being a
major factor.  In fact I'm thinking of opening a jira to remove it by
default.

On Mon, Jul 29, 2013 at 4:12 PM, Andrew Purtell <apurtell@apache.org> wrote:
> Having a difficult time avoiding evacuation failures under concurrent read
> and write stress. Tuning helps but raises contention for CPU. This is with
> "interesting" heap sizes - 32-128GB.
>
>
> On Mon, Jul 29, 2013 at 3:44 PM, Bryan Beaudreault <bbeaudreault@hubspot.com
>> wrote:
>
>> Due to the contention for CPU resources?  Or why?
>>
>>
>> On Mon, Jul 29, 2013 at 6:23 PM, Andrew Purtell <apurtell@apache.org>
>> wrote:
>>
>> > On Mon, Jul 29, 2013 at 3:14 PM, Elliott Clark <eclark@apache.org>
>> wrote:
>> >
>> > > Yes the G1 looks promising if you have a very read heavy workload
>> > > (We've been running it for integration tests for about a month or so).
>> > >
>> >
>> > That's my experience too. Unfortunately it's less promising once the
>> > workload is mixed.
>> >
>> > --
>> > Best regards,
>> >
>> >    - Andy
>> >
>> > Problems worthy of attack prove their worth by hitting back. - Piet Hein
>> > (via Tom White)
>> >
>>
>
>
>
> --
> Best regards,
>
>    - Andy
>
> Problems worthy of attack prove their worth by hitting back. - Piet Hein
> (via Tom White)

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