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From Jonathan Ellis <jbel...@gmail.com>
Subject Re: extremely high temporary disk utilization 0.7.5
Date Sat, 21 May 2011 23:45:44 GMT
http://wiki.apache.org/cassandra/MemtableSSTable

On Sat, May 21, 2011 at 3:40 AM, Jonathan Colby
<jonathan.colby@gmail.com> wrote:
>
> On each of our nodes we have an average of 80 - 100 GB actual cassandra data on 1 TB
disks.    There is normally plenty of capacity on the nodes.  Swap is OFF.  OS is Debian
64 bit.
>
> Every once in a while,  the disk usage will skyrocket to  500+ GB, even once filling
up the 1 TB disk (at least according to linux df).
>
> The thing is, after restarting the cassandra daemon, the disk usage correctly reflects
the actual data usage.
>
> What could be causing this massive temporary disk allocation?
>
> Is it malloc?     Is this an indication that something is not configured correctly?
Is this a bug?
>
> Any help would be appreciated!
>
> Jon
>
>
>
>



-- 
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com

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