Puppet users - Nov 2014 - many agents connecting at same time and 100+ nodes failed.

12:51 (34 minutes ago) 
   Hi,

In my puppet setup, i'm managing around 1700+ nodes via foreman.     I have 
3 puppet master ( one of the server is CA) under load-balancing and one 
foreman as ENC and report viewer. 

Around 900+ nodes connecting at same time, due to that 150 out of 900 
getting following error.

"Could not retrieve catalog from remote server: execution expired"


To fix this,   I have stopped puppet agent in 900+ nodes.   And started 
each agent with some intervals so that it can be shared to all minutes.   
But it helped only for one day.  

Kindly refer the attached image.  And suggest me any solution. 

Thanks & Regards,
Suresh.P

<https://lh5.googleusercontent.com/-dTW9OOHqp1s/VFsp3_7-1iI/AAAAAAAAIqo/SgZjYHm5g9o/s1600/foreman-dash.png>

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