<div dir="ltr">Our zdbbl defaults to 128000. This PR exposes how much of the zdbbl is being used: <a href="https://github.com/erlang/otp/pull/2270" target="_blank">https://github.com/erlang/otp/pull/2270</a><div><br></div><div>We've tried larger values - 1280000 - which increase memory usage and make throughput marginally better (~1%), but spikier.</div><div><br></div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Jun 18, 2019 at 10:40 PM Michael Truog <<a href="mailto:mjtruog@gmail.com" target="_blank">mjtruog@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">On 6/18/19 2:14 PM, Gerhard Lazu wrote:<br>
> <a href="https://github.com/erlang/otp/pull/2291" rel="noreferrer" target="_blank">https://github.com/erlang/otp/pull/2291</a> is an improvement for larger <br>
> payloads, not so much for smaller ones.<br>
><br>
> 60 KB - 13.6 Gbit/s (down from 14.4 Gbit/s)<br>
> 120 KB - 12.8 Gbit/s (down from 14.4 Gbit/s)<br>
> 10MB - 8.8 Gbit/s (up from 7.6 Gbit/s)<br>
> 100MB - 5.8 Gbit/s (up from 4.3 Gbit/s)<br>
><br>
> This is OTP 22.0.2 <br>
> <a href="https://grafana.gcp.rabbitmq.com/dashboard/snapshot/SDr2EWgaD2KOX5i0H154UvzoHRS68FV0" rel="noreferrer" target="_blank">https://grafana.gcp.rabbitmq.com/dashboard/snapshot/SDr2EWgaD2KOX5i0H154UvzoHRS68FV0</a><br>
><br>
> This is OTP 22.0.3 + PR 2291 <br>
> <a href="https://grafana.gcp.rabbitmq.com/dashboard/snapshot/8yxY61o140gvAKXFthgIVCes2oW2Owa7" rel="noreferrer" target="_blank">https://grafana.gcp.rabbitmq.com/dashboard/snapshot/8yxY61o140gvAKXFthgIVCes2oW2Owa7</a> <br>
><br>
><br>
> Will try <a href="https://github.com/erlang/otp/pull/2293" rel="noreferrer" target="_blank">https://github.com/erlang/otp/pull/2293</a> tomorrow<br>
><br>
You should also try using the erl command line option +zdbbl when <br>
testing larger payloads (it defaults to 1024 KB with valid values from 1 <br>
- 2097151 KB).<br>
<br>
Best Regards,<br>
Michael<br>
</blockquote></div>