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From S C <>
Subject RE: Flush writer all time blocked
Date Thu, 29 Aug 2013 18:04:49 GMT
Thanks Rob. Will it contribute to any performance problems?


Date: Thu, 29 Aug 2013 10:57:30 -0700
Subject: Re: Flush writer all time blocked

On Thu, Aug 29, 2013 at 10:49 AM, S C <> wrote:

I see a high count "All time blocked" for Flush Writer on nodetool tpstats. 
Is it how many blocked ever since the server was online? Can somebody explain me what it is?
I really appreciate it. 

Flush Writer thread pool is the thread pool responsible for the part of memtable flush that
actually writes to disk. If you see it with a non-zero blocked number, you have at some time
written to memory significantly faster than you could flush to disk.

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