Hi Jay,
Here's the backport to 3.0.14 -
https://github.com/whangsf/cassandra/commit/8db2e3ed412e42fed1da2d85ee7d086edcc8ae4c.
This should pass all unit tests, but please let me know if you have any
issues.
Thanks,
Andrew
On Mon, Aug 28, 2017 at 7:35 PM, Jay Zhuang
+1. IMO there’s very little reason to use 3.0 at this point. If someone wants
to back port and make a 3.0 patch publicly available, cool, but merging it into
3.0 after 2 years doesn’t make much sense to me.
> On Jul 31, 2017, at 9:26 AM, Jeremiah D Jordan
> wrote:
> On Jul 31, 2017, at 12:17 PM, Jeff Jirsa wrote:
> On 2017-07-29 10:02 (-0700), Jay Zhuang wrote:
>> Should we consider back-porting it to 3.0 for the community? I think
>> this is a performance regression instead of new feature. And we have
On 2017-07-29 10:02 (-0700), Jay Zhuang wrote:
> Should we consider back-porting it to 3.0 for the community? I think
> this is a performance regression instead of new feature. And we have the
> feature in 2.1, 2.2.
>
Personally / individually, I'd much rather
Should we consider back-porting it to 3.0 for the community? I think
this is a performance regression instead of new feature. And we have the
feature in 2.1, 2.2.
On 7/27/17 11:52 PM, Andrew Whang wrote:
> Yes, seeing latency improvement after backporting 9472 to 3.0.13. We are
> measuring p99
Yes, seeing latency improvement after backporting 9472 to 3.0.13. We are
measuring p99 latency, thus moving objects off heap improved gc stalls,
which directly affects our read/write p99 latency.
On Thu, Jul 27, 2017 at 10:54 PM, Jeff Jirsa wrote:
> This is after you
This is after you backported 9472 to 3.0?
--
Jeff Jirsa
> On Jul 27, 2017, at 10:33 PM, Andrew Whang 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
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
wrote:
> Hi Andrew,
>
> Do you see performance gain from
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,
>