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From Peter Schuller <>
Subject Re: flush_largest_memtables_at messages in 7.4
Date Tue, 12 Apr 2011 20:49:52 GMT
> Heap is 0.7802529021498031 full. You may need to reduce memtable and/or
> cache sizes Cassandra will now flush up to the two largest memtables to free
> up memory. Adjust flush_largest_memtables_at threshold in cassandra.yaml if
> you don't want Cassandra to do this automatically
> How do I verify that I need to adjust any thresholds? And how to calculate
> correct value?

Is this on the same cluster/nodes that you're doing your 250k column
stresses (the other thread)?

In any case, for typical cases there is:

/ Peter Schuller

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