incubator-cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Jonathan Ellis <jbel...@gmail.com>
Subject Re: Fun with Heap Dump ...
Date Fri, 02 Sep 2011 00:27:54 GMT
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

Mime
View raw message