<div dir="ltr"><div>Hi,</div><div><br></div><div><br></div><div>A colleague of mine reported a memory usage issue with the bird daemon last year, which resulted in a request for a core dump, but we never followed it up.</div><div>I'd like to re-open this discussion and see if anything can be done to fix it.</div><div><br></div><div>I'll provide some information regarding a production environment, where the problem is most obvious. But any further details and diagnostics will have to come from our lab environment.</div><div>Please note, in production we mostly run 1.5, but in the lab we are on 1.6, however we see the same symptoms in both environments on both versions.</div><div><br></div><div>The symptoms are twofold, but potentially related - greater than expected memory usage reported by the bird daemon itself for the number of routes, but also massively more memory actually used by the daemon process.</div><div><br></div><div>When the process is started, we see "normal" memory usage, which then seems to grow indefinitely in distinct steps, separated by a period of a few hours.<br></div><div>In production, this consumes most of the 32G of memory until the kernel oom-killer to intervenes.<br></div><div><br></div><div><br></div><div><blockquote style="margin:0 0 0 40px;border:none;padding:0px"><div>Production:<br></div><div><br></div><div><div>BIRD 1.5.0 ready.</div></div><div><div>bird> show memory </div></div><div><div>BIRD memory usage</div></div><div><div>Routing tables: 1405 MB</div></div><div><div>Route attributes: 84 kB</div></div><div><div>ROA tables: 192 B</div></div><div><div>Protocols: 45 kB</div></div><div><div>Total: 1405 MB</div></div><div><br></div><div><div>bird> show route count</div></div><div><div>2273 of 2273 routes for 1142 networks</div></div></blockquote></div><div><br></div><div><br></div><blockquote style="margin:0 0 0 40px;border:none;padding:0px"><div><div># ps u -p 3441</div></div><div><div>USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND</div></div><div><div>bird 3441 0.1 55.4 18275124 18241540 ? Ssl Aug10 73:39 /usr/sbin/bird -f -u bird -g bird</div></div></blockquote><div><br></div><div><br></div><div>..so that's ~1.4G reported by bird, and ~18G actually consumed by the process.</div><div><br></div><div><br></div><blockquote style="margin:0 0 0 40px;border:none;padding:0px"><div>Lab:</div><div><div>BIRD 1.6.0 ready.</div></div><div><div>bird> show mem</div></div><div><div>BIRD memory usage</div></div><div><div>Routing tables: 693 MB</div></div><div><div>Route attributes: 28 kB</div></div><div><div>ROA tables: 192 B</div></div><div><div>Protocols: 41 kB</div></div><div><div>Total: 693 MB</div></div><div><div><br></div></div><div><div>bird> show route count</div></div><div><div>175 of 175 routes for 91 networks</div></div></blockquote><div><br></div><blockquote style="margin:0 0 0 40px;border:none;padding:0px"><div><div># ps u -p 29085</div></div><div><div>USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND</div></div><div><div>bird 29085 0.0 14.9 4994852 4915032 ? Ssl Aug05 19:41 /usr/sbin/bird -f -u bird -g bird</div></div></blockquote><div><br></div><div>..so that's ~ 0.7G reported by bird, and ~5G actually consumed by the process.</div><div><br></div><div>I also attached the bird config from the lab.</div><div><br></div><div><br></div><div>Any help is much appreciated!</div><div>Thanks.</div><div><br></div><br clear="all"><div><div class="gmail_signature"><div><br></div>Cheers,<div>Just</div></div></div>
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