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From Girish Kumar <>
Subject Large # of Pending Tasks?
Date Mon, 26 Aug 2013 09:39:21 GMT

I'm using a single node Cassandra on 24 Core/48GB system.  I have set my
writers and readers (in yaml) to be around 192 for both and read and write.
 In this mode, when stressed with 192 threads for inserts and reads, what I
observed via the jconsole of 'client request' the active read and write
tasks never go beyond 24.  However there are as many as 192 pending tasks.
 I was expecting Cassandra server to utilize the threads that are created
using yaml and perform as many parallel inserts and reads.

Why cassandra active task count doesn't go beyond 24 when the actual
writers and readers are around 192 ?

Any thoughts?

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