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From Jeff Jirsa <jji...@gmail.com>
Subject Re: CASSANDRA-9472 Reintroduce off heap memtables - patch to 3.0
Date Fri, 28 Jul 2017 05:54:19 GMT
This is after you backported 9472 to 3.0?

-- 
Jeff Jirsa


> On Jul 27, 2017, at 10:33 PM, Andrew Whang <andrewgwhang@gmail.com> wrote:
> 
> Jay,
> 
> We see ~20% write latency improvement on 3.0.13 in a write-heavy workload,
> using offheap_objects. offheap_buffers only offered minimal improvement.
> 
> On Thu, Jul 27, 2017 at 10:06 PM, Jay Zhuang <jay.zhuang@yahoo.com.invalid>
> wrote:
> 
>> Hi Andrew,
>> 
>> Do you see performance gain from reintroducing off-heap memtables for
>> 3.0.x? When we were on 2.2.x we saw big improvements from enabling
>> off-heap memtables.
>> 
>> Thanks,
>> Jay
>> 
>>> On 7/27/17 9:37 PM, Andrew Whang wrote:
>>> I'm wondering if anyone has been able to patch CASSANDRA-9472 to 3.0,
>>> without breaking unit tests. The patch was introduced in 3.4, but 3.0.x
>>> contains unit tests and code from later 3.x releases, which makes
>> debugging
>>> unit test failures difficult - i.e. SSTableCorruptionDetectionTest,
>> which
>>> was introduced in 3.7 and is found in 3.0.14, but not in 3.4.
>>> 
>> 
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