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From "王一锋" <>
Subject Re: Re: Re: What is consuming the heap?
Date Wed, 21 Jul 2010 04:53:04 GMT

no, I'm using QUORUM for both writes and reads
Replication factor is 3


发件人: Dathan Pattishall 
发送时间: 2010-07-21  12:51:32 
收件人: user 
主题: Re: Re: What is consuming the heap? 
By off chance on writes are you using ConsistencyLevel::ZERO?

On Tue, Jul 20, 2010 at 9:41 PM, 王一锋 <> 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


发件人: Peter Schuller 
发送时间: 2010-07-20  21:45:08 
收件人: user 
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
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