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From Peter Schuller <>
Subject Re: keycache persisted to disk ?
Date Mon, 13 Feb 2012 08:51:18 GMT
For one thing, what does ReadStage's pending look like if you
repeatedly run "nodetool tpstats" on these nodes? If you're simply
bottlenecking on I/O on reads, that is the most easy and direct way to
observe this empirically. If you're saturated, you'll see active close
to maximum at all times, and pending racking up consistently. If
you're just close, you'll likely see spikes sometimes.

/ Peter Schuller (@scode,

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