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From: sulong <sulong1984@gmail.com>
Date: Thu, 27 Jun 2013 10:02:26 +0800
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Subject: Re: CompactionExecutor holds 8000+ SSTableReader 6G+ memory
To: user@cassandra.apache.org
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According to  the OpsCenter records, yes,  the compaction was running then,
8.5mb /s


On Thu, Jun 27, 2013 at 9:54 AM, sulong <sulong1984@gmail.com> wrote:

> version: 1.2.2
> cluster read requests 800/s, write request 22/s
> Sorrry, I don't know whether  the compaction was running then.
>
>
> On Thu, Jun 27, 2013 at 1:02 AM, Robert Coli <rcoli@eventbrite.com> wrote:
>
>> On Tue, Jun 25, 2013 at 10:13 PM, sulong <sulong1984@gmail.com> wrote:
>> > I have 4 nodes cassandra cluster. Every node has 32G memory, and the
>> > cassandra jvm uses 8G. The cluster is suffering from gc. Looks like
>> > CompactionExecutor thread holds too many SSTableReader. See the
>> attachement.
>>
>> What version of Cassandra?
>> What workload?
>> Is compaction actually running?
>>
>> =Rob
>>
>
>

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<div dir=3D"ltr">According to =C2=A0the OpsCenter records, yes, =C2=A0the c=
ompaction was running then, 8.5mb /s</div><div class=3D"gmail_extra"><br><b=
r><div class=3D"gmail_quote">On Thu, Jun 27, 2013 at 9:54 AM, sulong <span =
dir=3D"ltr">&lt;<a href=3D"mailto:sulong1984@gmail.com" target=3D"_blank">s=
ulong1984@gmail.com</a>&gt;</span> wrote:<br>

<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex"><div dir=3D"ltr">version: 1.2.2<div>cluster =
read requests 800/s, write request 22/s</div><div>Sorrry, I don&#39;t know =
whether =C2=A0the compaction was running then.</div>

</div><div class=3D"HOEnZb"><div class=3D"h5"><div class=3D"gmail_extra"><b=
r><br><div class=3D"gmail_quote">
On Thu, Jun 27, 2013 at 1:02 AM, Robert Coli <span dir=3D"ltr">&lt;<a href=
=3D"mailto:rcoli@eventbrite.com" target=3D"_blank">rcoli@eventbrite.com</a>=
&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0=
 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">


<div><div>On Tue, Jun 25, 2013 at 10:13 PM, sulong &lt;<a href=3D"mailto:su=
long1984@gmail.com" target=3D"_blank">sulong1984@gmail.com</a>&gt; wrote:<b=
r>
&gt; I have 4 nodes cassandra cluster. Every node has 32G memory, and the<b=
r>
&gt; cassandra jvm uses 8G. The cluster is suffering from gc. Looks like<br=
>
&gt; CompactionExecutor thread holds too many SSTableReader. See the attach=
ement.<br>
<br>
</div></div>What version of Cassandra?<br>
What workload?<br>
Is compaction actually running?<br>
<br>
=3DRob<br>
</blockquote></div><br></div>
</div></div></blockquote></div><br></div>

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