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From Jonathan Ellis <>
Subject Re: Re: compaction slow while sstable>25GB,limitation of the sstablesize?
Date Thu, 29 Apr 2010 12:53:20 GMT
2010/4/29 <>:
> Hi,
>        Now I start to know what's really happenning. The INDEX_INTERVAL(in
was set to be 4; so at least 1/4
> of the indices are in the heap. For a node with 20M columns, most of the heap is occupied
by indices, and of course a poor performance
> with processing large files.
>        Is it possible to modify the INDEX_INTERVAL without reconstruct the sstables?
I modified the code,  and restart every node,
> but "NotFoundException()" is reported when read the columns.

No.  INDEX_INTERVAL is not intended to be configurable.  (It is
all-caps, the convention for constants...)

Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of Riptano, the source for professional Cassandra support

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