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Date: Thu, 14 May 2015 15:26:13 -0500
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 <CAKmMYa81rOeVCm76R3WoPyd=UC1ux_spCYNybKYq-KTXHrpEUg@mail.gmail.com>
Subject: Re: Updating Table Schemas Slows Down Cluster
From: Nate McCall <nate@thelastpickle.com>
To: Cassandra Users <user@cassandra.apache.org>
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You might be seeing the effects of
https://issues.apache.org/jira/browse/CASSANDRA-9136 which was just fixed
in 2.0.15.

The connection thrashing from the above would definitely cause some
hiccups.

On Thu, May 14, 2015 at 3:10 PM, Christopher Kelly <cekelly@cs.princeton.edu
> wrote:

> Hi all,
>
> We're running a 24 node cluster and we've noticed that whenever we either
> update an existing table or add a new table, the cluster's load increases
> immensely during and after for about 1 minute, triggering a lot of read and
> write timeouts.  Has anyone seen this behavior before or have any ideas as
> to why schema updates are such an intensive operation? We are running on
> 2.0.10.
>
> Thanks,
> Chris
>


-- 
-----------------
Nate McCall
Austin, TX
@zznate

Co-Founder & Sr. Technical Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com

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<div dir=3D"ltr">You might be seeing the effects of=C2=A0<a href=3D"https:/=
/issues.apache.org/jira/browse/CASSANDRA-9136">https://issues.apache.org/ji=
ra/browse/CASSANDRA-9136</a> which was just fixed in 2.0.15.=C2=A0<div><br>=
</div><div>The connection thrashing from the above would definitely cause s=
ome hiccups.=C2=A0</div></div><div class=3D"gmail_extra"><br><div class=3D"=
gmail_quote">On Thu, May 14, 2015 at 3:10 PM, Christopher Kelly <span dir=
=3D"ltr">&lt;<a href=3D"mailto:cekelly@cs.princeton.edu" target=3D"_blank">=
cekelly@cs.princeton.edu</a>&gt;</span> wrote:<br><blockquote class=3D"gmai=
l_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left=
:1ex"><div dir=3D"ltr">Hi all,<div><br></div><div>We&#39;re running a 24 no=
de cluster and we&#39;ve noticed that whenever we either update an existing=
 table or add a new table, the cluster&#39;s load increases immensely durin=
g and after for about 1 minute, triggering a lot of read and write timeouts=
.=C2=A0 Has anyone seen this behavior before or have any ideas as to why sc=
hema updates are such an intensive operation? We are running on 2.0.10.</di=
v><div><br></div><div>Thanks,</div><div>Chris</div></div>
</blockquote></div><br><br clear=3D"all"><div><br></div>-- <br><div class=
=3D"gmail_signature"><div dir=3D"ltr">-----------------<br>Nate McCall<br>A=
ustin, TX<br>@zznate<br><br>Co-Founder &amp; Sr. Technical Consultant<br>Ap=
ache Cassandra Consulting<br><a href=3D"http://www.thelastpickle.com" targe=
t=3D"_blank">http://www.thelastpickle.com</a></div></div>
</div>

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