> 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: http://www.datastax.com/docs/0.7/operations/tuning -- / Peter Schuller
