incubator-cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Dathan Pattishall <datha...@gmail.com>
Subject Re: Re: What is consuming the heap?
Date Wed, 21 Jul 2010 04:49:54 GMT
By off chance on writes are you using ConsistencyLevel::ZERO?




On Tue, Jul 20, 2010 at 9:41 PM, 王一锋 <wangyifeng@aspire-tech.com> wrote:

>  So the bloom filters reside in memory completely?
>
> We do have a lot of small values, hundreds of millions of columns in a
> columnfamily.
>
> I count the total size of *-Filter.db files in my keyspace, it's
> 436,747,815bytes.
>
> I guess this means it won't consume a major part of 10g heap space
>
>
> 2010-07-21
> ------------------------------
>
> ------------------------------
> *发件人:* Peter Schuller
> *发送时间:* 2010-07-20  21:45:08
> *收件人:* user
> *抄送:*
> *主题:* Re: What is consuming the heap?
>
> > heap size is 10G and the load of data per node was around 300G, 16-core CPU,
>  Are the 300 GB made up of *really* small values? Per SS table bloom
> filters do consume memory, but you'd have to have a *lot* of *really*
> small values for a 300 GB database to cause bloom filters to be a
> significant part of a 10 GB h eap.
>  --
> / Peter Schuller
>

Mime
View raw message