[Pacemaker] high cib load on config change

[James Harper]

> > I guess I'd first like to know if the log entries I was seeing ("Failed
> > application of an update diff" and "Requesting re-sync from peer") means
> > that a full resync is being done, and if that's a problem or not.
> 
> There are occasions when its not a problem, but I don't think any of them
> apply to you.
> 
> Questions:
> - are you making any config changes when this behaviour is occurring?

Yes. This is when the problem occurs (eg adding a location to a resource)

> - if so, from one node only or many?