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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-2141) Flexible thread pool for RPC server
Date Sun, 17 Jan 2010 20:33:54 GMT
Flexible thread pool for RPC server

                 Key: HBASE-2141
                 URL: https://issues.apache.org/jira/browse/HBASE-2141
             Project: Hadoop HBase
          Issue Type: Improvement
            Reporter: Andrew Purtell
             Fix For: 0.21.0

Having a bounded thread pool is important, so availability can degrade gracefully (more or
less), as opposed to the whole regionserver becoming livelocked. But, we don't need for the
pool to be preallocated as is done currently. How about changing the RPC server thread pool
such that the user can specify a minimum and maximum number of handler threads? The pool would
start with the minimum, allocate more up to the max to handle additional concurrency, then
terminate unused threads after some time back down to the minimum. Then we can do things like
set a maximum of 100 handlers or such without taking on the overhead of 100 threads until
it is needed. 

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