On Thu, Aug 29, 2013 at 10:49 AM, S C <as...@outlook.com> 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. >
Yes. 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. =Rob
