[ClusterLabs] Antw: Antw: notice: throttle_handle_load: High CPU load detected

Vladislav Bogdanov bubble at hoster-ok.com
Tue May 9 08:42:28 EDT 2017

09.05.2017 00:56, Ken Gaillot wrote:


> Those messages indicate there is a real issue with the CPU load. When
> the cluster notices high load, it reduces the number of actions it will
> execute at the same time. This is generally a good idea, to avoid making
> the load worse.


> message, and 2.0 to get the "High CPU load" message. These are measured
> against the 1-minute system load average (the same number you would get
> with top, uptime, etc.).

Well, linux loadavg actually has nothing to *CPU* load.


The most common example to prove that is a storage system (I see that 
with in-kernel iSCSI target) with dedicated data disks/arrays, where 
loadavg can be very high (100-200 is not uncommon), but actual CPU usage 
(user+system) is not more that 20%. For such systems load threshold 
plays bad role, unnecessarily slowing down cluster reactions.


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