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From "Anoop Sam John (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-17073) Increase the max number of buffers in ByteBufferPool
Date Fri, 11 Nov 2016 07:28:58 GMT
Anoop Sam John created HBASE-17073:
--------------------------------------

             Summary: Increase the max number of buffers in ByteBufferPool
                 Key: HBASE-17073
                 URL: https://issues.apache.org/jira/browse/HBASE-17073
             Project: HBase
          Issue Type: Sub-task
    Affects Versions: 2.0.0
            Reporter: Anoop Sam John
            Assignee: Anoop Sam John
             Fix For: 2.0.0


Before the HBASE-15525 issue fix, we had variable sized buffers in our buffer pool. The max
size upto which one buffer can grow was 2 MB.  Now we have changed it to be a fixed sized
BBPool. By default 64 KB is the size of each buffer.  But the max number of BBs allowed to
be in the pool was not changed.  ie. twice the number of handlers. May be we should be changing
increasing it now?  To make it equal to the way like 2 MB, we will need 32 * 2 * handlers.
 There is no initial #BBs any way. 2 MB is the default max response size what we have. And
write reqs also, when it is Buffered mutator 2 MB is the default flush limit.  We can make
it to be 32 * #handlers as the def max #BBs I believe.




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