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Date: Mon, 22 Nov 2010 13:22:05 -0800
Message-ID: <AANLkTi=KsxNEg892T3Nc956hCyMw_rSgsEb-_gFtQ+pC@mail.gmail.com>
Subject: Re: Newbie question on Cassandra mem usage
From: Trung Tran <tran.hieutrung@gmail.com>
To: user@cassandra.apache.org
Content-Type: text/plain; charset=ISO-8859-1

Hi,

Is it the min_compaction_threshold and max_compaction_threshold? Do i
need to lower the memtable setting also?

Thanks,
Trung.

On Mon, Nov 22, 2010 at 12:02 PM, Jonathan Ellis <jbellis@gmail.com> wrote:
> Set your columnfamily thresholds lower.
>
> On Mon, Nov 22, 2010 at 12:45 PM, Trung Tran <tran.hieutrung@gmail.com> wrote:
>> Hi,
>>
>> I have a test cluster of 3 nodes, 14Gb of mem in each node,
>> replication factor = 3. With default -Xms and Xmx, my nodes are set to
>> have max-heap-size = 7Gb. After initial load with about 200M rows
>> (write with hector default consistencylevel = quorum,) my nodes memory
>> usage are up to 13.5Gb, show a bunches of GC notifications and
>> eventually crashes with java.lang.OutOfMemoryError: Java heap space.
>>
>> Is there any setting that can help with this scenario?
>>
>> Thanks,
>> Trung.
>>
>
>
>
> --
> Jonathan Ellis
> Project Chair, Apache Cassandra
> co-founder of Riptano, the source for professional Cassandra support
> http://riptano.com
>