On Thu, Nov 17, 2022 at 2:01 PM Josh McKenzie wrote:
> 3) Expert: Leave me alone. I tune my own GC
This is increasingly not a thing. I haven't looked at ZGC, but G1 and
Shenandoah provide a lot of knobs...that the collector will happily
ignore if it decides it knows better :)
--
+--
I wouldn't recommend Shenandoah or ZGC, period. They're not designed
for the kind of workload you'll typically see running a database (high
throughput of objects that don't tenure) and both will fall over in
interesting ways under high allocation rate. GenShen is intended to
combine the generationa
On Thu, Nov 17, 2022 at 12:47 PM J. D. Jordan
wrote:
> -1 on providing a bunch of choices and forcing users to pick one. We
> should have a default and it should be “good enough” for most people. The
> people who want to dig in and try other gc settings can still do it, and we
> could provide the
> -1 on providing a bunch of choices and forcing users to pick one. We should
> have a default and it should be “good enough” for most people.
These are 2 different things (providing choices and whether we provide a
default).
Sounds like you're against both not having a default *and* providing c
-1 on providing a bunch of choices and forcing users to pick one. We should
have a default and it should be “good enough” for most people. The people who
want to dig in and try other gc settings can still do it, and we could provide
them some profiles to start from, but there needs to be a defau
>
> The test build of Cassandra 4.1-rc1 is available.
>
Our requirements for 4.1-rc were one green CI run. And no regression
flakies (except the two we have waivers for).
The green circleci runs are here:
-
https://app.circleci.com/pipelines/github/michaelsembwever/cassandra/40/workflows/fa742c
It seems like this is a choice most users might not know how to make?
On Thu, Nov 17, 2022 at 7:06 AM Josh McKenzie wrote:
>
> Have we ever discussed including multiple profiles that are simple to swap
> between and documented for their tested / intended use cases?
>
> Then the burden of having
Jon, thanks for flagging that I didn't get a reply to your question on the thread.My main point in this thread is that I don't
think post-beta is an appropriate time for a major prop change like this in the release cycle. Ideally at this point in the
release cycle, major contributors and large u
I'm surprised we released 4.0 without changing the default to G1 given
that many Cassandra deployments have changed the project's default
because it is incorrect. I know that 7486 broke a user 7 years ago,
but I think we have had a ton of testing since then in the community
to build our confidence.
On Thu, Nov 17, 2022 at 9:06 AM Josh McKenzie wrote:
>
> Arguably we could take it a step further and not actually allow a C* node to
> startup without pointing to one of the config files from your primary config,
> and provide a clean mechanism to integrate that selection on headless
> install
Have we ever discussed including multiple profiles that are simple to swap
between and documented for their tested / intended use cases?
Then the burden of having a “sane” default for the wild variance of workloads
people use it for would be somewhat mitigated. Sure, there’s always going to be
I noticed nobody answered my actual question - what would it take for you to be
comfortable?
It seems that the need to do a release is now more important than the best
interests of the new user's experience - despite having plenty of *production*
experience showing that what we ship isn't eve
The test build of Cassandra 4.1-rc1 is available.
sha1: d6822c45ae3d476bc2ff674cedf7d4107b8ca2d0
Git:
https://gitbox.apache.org/repos/asf?p=cassandra.git;a=shortlog;h=refs/tags/4.1-rc1-tentative
Maven Artifacts:
https://repository.apache.org/content/repositories/orgapachecassandra-1280/org/apache/
Ok, wrt G1 default, this is won't go ahead for 4.1-rc1
We can revisit it for 4.1.x
We have a lot of voices here adamantly positive for it, and those of us
that have done the performance testing over the years know why. But being
called to prove it is totally valid, if you have data to any such te
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