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From Ian Danforth <idanfo...@numenta.com>
Subject Re: Fun with Heap Dump ...
Date Fri, 02 Sep 2011 00:58:50 GMT
Awesome, thanks for the quick response!

Ian

On Thu, Sep 1, 2011 at 5:27 PM, Jonathan Ellis <jbellis@gmail.com> wrote:
> On Thu, Sep 1, 2011 at 6:54 PM, Ian Danforth <idanforth@numenta.com> wrote:
>> 1. What operation is C* performing during lines like these:
>>
>>  INFO 22:38:34,710 Opening /cassandra/data/Keyspace1/TwitterTest-g-5643
>>
>> (I think this is an SSTable it's extracting an index for this column
>> family from)
>
> Right.
>
>> 2. Has my CF index outgrown memory?
>
> Yes.
>
>> 3. If so is there a way to relate # CF, # Columns, # Rows to index size?
>
> Only the row index sample is kept in memory.  So it's the product of
> key size * row count / index_interval.
>
> --
> Jonathan Ellis
> Project Chair, Apache Cassandra
> co-founder of DataStax, the source for professional Cassandra support
> http://www.datastax.com
>

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