Hi Pengfei,<br><br>I see those warnings often when running big yt jobs on Nautilus.  You can get rid of them by setting those environment variables to something like:<br>export MPI_BUFS_PER_PROC=1024<br>export MPI_BUFS_PER_HOST=1024<br>
<br>That should get rid of those warnings, but may not totally solve the problem of the job ending prematurely, so let us know if you&#39;re still having problems.<br><br>Britton<br><div class="gmail_extra"><br><br><div class="gmail_quote">
On Wed, Dec 5, 2012 at 12:40 AM, Pengfei Chen <span dir="ltr">&lt;<a href="mailto:madcpf@gmail.com" target="_blank">madcpf@gmail.com</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi all,<div><br></div><div>I&#39;m trying to do MergerTree for 10 snapshots on Nautilus. Each of the snapshots has around 500,000,000 particles. I tried </div><div><br></div><div>#PBS -l ncpus=256</div><div>#PBS -l mem=1024GB</div>

<div>#PBS -l walltime=12:00:00</div><div><br></div><div>but it ended 11 minutes later with the error:</div><div><br></div><div><div>MPI WARNING: Could not allocate an internal buffer in the last 30 seconds</div><div>on rank 184.  Try increasing MPI_BUFS_PER_PROC and/or MPI_BUFS_PER_HOST.</div>

</div><div><br></div><div>Could someone please give me an estimation about how much memory I need to use?</div><div><br></div><div>Thanks!</div><span class="HOEnZb"><font color="#888888"><div><br></div><div>Pengfei</div>

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