<div dir="ltr">Yes, that's pretty much my scenario. The hosts are using about 1.x GB just for being online (munin, nrpe, amanda, fail2ban, etc), so 10% in 16GB nodes is a really bad idea. I'll stick to your proposal!<div>
<br></div><div>Thanks! <div class="gmail_extra"><br><div class="gmail_quote">2014-09-04 15:18 GMT-03:00 Jay Pipes <span dir="ltr"><<a href="mailto:jaypipes@gmail.com" target="_blank">jaypipes@gmail.com</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="">On 09/04/2014 01:51 PM, Juan José Pavlik Salles wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi Jay, I do agree about 10% being too much memory in big nodes, but<br>
right now we are using small ones (too small if you ask). These new<br>
nodes are 16GB so if I reserve 4 Gb for the dom0 I'd be loosing 25% of<br>
the available RAM. I was thinking about something like: if you have got<br>
less than 32GB give 10% of it to the dom0 and If you have got more than<br>
32GB go with 4GB for the dom0. Maybe different environments will need<br>
different rules, but this should work in most standar deployments I'd<br>
say. Jay, you mentioned that big nodes running many VMs don't neet more<br>
than 4GB of dedicated RAM, haven't you ever had any swapping situation<br>
in that kind of scenarios?<br>
</blockquote>
<br></div>
One more thing of note... if you have a lot of custom host or IDS monitoring or custom host applications running, you may want to increase the host RAM. By "custom" I mean anything other than Nagios/Zabbix/Ganglia-type stuff, which tend to be pretty low-memory daemons...<br>
<br>
Do some investigation of a sample packed and sparse compute node and adjust as you see fit.<br>
<br>
Best,<br>
-jay<br>
</blockquote></div><br><br clear="all"><div><br></div>-- <br><div dir="ltr">Pavlik Salles Juan José<div>Blog - <a href="http://viviendolared.blogspot.com" target="_blank">http://viviendolared.blogspot.com</a></div></div>
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