RE: Send Buffers overloaded in NDB kernel

[Andrew Hutchings]

Hello Matthew,

On Tue, 2009-11-03 at 10:03 -0600, Boehm, Matthew wrote:
> A benchmarking application wouldn't produce good results if it had to
> "do again". Basically this shows that cluster cannot handle 256 threads
> of "update non-index" style SQL.

Not quite, it shows your configuration cannot handle this.  Cluster is
not designed to perform well doing this but it can be done.  I suggest
increasing the 6M hard limit you have set on the Send and Receive
buffers (or removing them completely so the dynamic
TotalSendBufferMemory can be used).  Especially if you are using ndbmtd.

Kind Regards
-- 
Andrew Hutchings, MySQL Support Engineer, Americas
Sun Microsystems, United Kingdom
http://www.sun.com/mysql/