Hi Matthew, all, I had a couple people here test out this new branch vs. our old branch on a local VM. One thing we didn't know is that our messages were relatively big -- 10KB each (I thought they were always much smaller.)<div>
<br></div><div>They report:<div><font class="Apple-style-span" face="arial, sans-serif"><span class="Apple-style-span" style="border-collapse: collapse;"><br></span></font></div><div><span class="Apple-style-span" style="font-family: arial, sans-serif; font-size: 13px; border-collapse: collapse; ">On a virtual machine with 1.5GB ram, we saw the following behaviour:</span></div>
<div><span class="Apple-style-span" style="font-family: arial, sans-serif; font-size: 13px; border-collapse: collapse; "><br>latest stable erlang + rabbitmq (20980) died once, and another time became unresponsive, both times just before it hit ~2M messages (9KB each). CPU was pegged around 90 %, and swap grew to almost 5GB.<br>
<br>latest stable erlang + rabbitmq (21444) never died, even with 3.5M+ messages. CPU was 90 %, and swap never grew past ~1.7GB.</span></div><div><br></div><div><br></div><div>We're going to upgrade to 21444 on our host and see how it goes.</div>
<div><br></div><div>Thanks</div><div>Brian</div><div><br></div><div><br></div><div><br><br><div class="gmail_quote">On Thu, Oct 8, 2009 at 7:20 AM, Matthew Sackman <span dir="ltr"><<a href="mailto:matthew@lshift.net">matthew@lshift.net</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Hi Brian,<br>
<div class="im"><br>
On Mon, Oct 05, 2009 at 11:04:21AM +0100, Matthew Sackman wrote:<br>
> However, if you just had billions of<br>
> messages in there, then even in a non clustered setup, I could believe<br>
> mnesia would be taking a long time to start up and that might cause the<br>
> above error.<br>
<br>
</div>I've just come across this thread:<br>
<a href="http://www.trapexit.org/forum/viewtopic.php?p=44433" target="_blank">http://www.trapexit.org/forum/viewtopic.php?p=44433</a><br>
which does indeed seem to support the idea that even modest mnesia<br>
databases can take rather more than the 30 seconds we give them to<br>
start up. Given that I would imagine this could happen even in v1.7<br>
with, say, a couple million durable queues, exchanges and bindings,<br>
this is certainly something we will look at as the 30 second timeout<br>
may well be grossly too short.<br>
<div><div></div><div class="h5"><br>
Matthew<br>
<br>
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