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Memory Pipes and MPI Buffers Issue

Hello-

Our portal box crashed with the below error:

[Thr 5659] Mon Aug 20 14:23:09 2012

[Thr 5659] *** WARNING => IcmReadFromConn(id=32/208743): temporarily out of MPI buffers -> roll out [icxxthrio_mt 2658]

[Thr 1543] Mon Aug 20 14:23:12 2012

[Thr 1543] *** ERROR => HttpJ2EETriggerServer: alloc failed: out of MPI blocks [http_j2ee2_m 1646]

[Thr 3342] Mon Aug 20 14:23:18 2012

[Thr 3342] *** WARNING => IcmReadFromConn(id=44/208745): temporarily out of MPI buffers -> roll out [icxxthrio_mt 2658]

[Thr 4372] *** WARNING => IcmReadFromConn(id=20/208746): temporarily out of MPI buffers -> roll out [icxxthrio_mt 2658]

[Thr 5145] Mon Aug 20 14:23:19 2012

[Thr 5145] *** WARNING => IcmReadFromConn(id=11/208747): temporarily out of MPI buffers -> roll out [icxxthrio_mt 2658]

[Thr 3085] Mon Aug 20 14:23:20 2012

[Thr 3085] *** WARNING => IcmReadFromConn(id=31/208748): temporarily out of MPI buffers -> roll out [icxxthrio_mt 2658]

[Thr 5402] Mon Aug 20 14:23:22 2012

[Thr 5402] *** WARNING => IcmReadFromConn(id=25/208749): temporarily out of MPI buffers -> roll out [icxxthrio_mt 2658]

[Thr 1800] Mon Aug 20 14:23:23 2012

[Thr 1800] *** ERROR => HttpJ2EETriggerServer: alloc failed: out of MPI blocks [http_j2ee2_m 1646]

[Thr 2828] Mon Aug 20 14:23:28 2012

[Thr 2828] *** WARNING => IcmReadFromConn(id=26/208751): temporarily out of MPI buffers -> roll out [icxxthrio_mt 2658]

[Thr 4886] Mon Aug 20 14:23:32 2012

[Thr 4886] *** WARNING => IcmReadFromConn(id=16/208752): temporarily out of MPI buffers -> roll out [icxxthrio_mt 2658]

[Thr 2571] Mon Aug 20 14:23:34 2012

[Thr 2571] *** ERROR => HttpJ2EETriggerServer: alloc failed: out of MPI blocks [http_j2ee2_m 1646]

[Thr 2828] Mon Aug 20 14:23:35 2012

[Thr 2828] *** WARNING => IcmReadFromConn(id=26/208751): temporarily out of MPI buffers -> roll out [icxxthrio_mt 2658]

[Thr 3342] *** WARNING => IcmReadFromConn(id=25/208749): temporarily out of MPI buffers -> roll out [icxxthrio_mt 2658]

[Thr 1286] *** WARNING => IcmReadFromConn(id=31/208748): temporarily out of MPI buffers -> roll out [icxxthrio_mt 2658]

[Thr 3085] *** WARNING => IcmReadFromConn(id=11/208747): temporarily out of MPI buffers -> roll out [icxxthrio_mt 2658]

[Thr 4372] *** WARNING => IcmReadFromConn(id=20/208746): temporarily out of MPI buffers -> roll out [icxxthrio_mt 2658]

[Thr 5145] *** WARNING => IcmReadFromConn(id=44/208745): temporarily out of MPI buffers -> roll out [icxxthrio_mt 2658]

[Thr 5402] *** WARNING => IcmReadFromConn(id=32/208743): temporarily out of MPI buffers -> roll out [icxxthrio_mt 2658

I found OSS notes 737625 and 715400  that are relavant , but I know not quite confident as to what all parameters and by how much the size of those parameters should be increased? I understand that the mpi/total_size_MB  need to be increased.

Also for AIX sidadm ulimit -n we currently have "no files(descriptors) 2000" , how much should this be changed?

Please suggest all the parameters/sizes that need to be edited. We have around 6000 users that use the system heavily.

Our default values:

rdisp/elem_per_queue = 4000

mpi/total_size_MB = 500

mpi/buffer_size = 65536

mpi/max_pipes = 16000

Thank you!

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