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From Otis Gospodnetic <>
Subject Re: high cpu usage
Date Mon, 14 Feb 2011 03:08:45 GMT

This could be the JVM doing constant GCing because there is not much room in the 
heap for new objects (jstat will help you check this).  It could also be that 
you have a deadlock - I just saw a similar case with one of our customers' Solr 
- out of N CPU cores, one was at 100% and jstack showed a deadlock (in 
HttpClient used by SolrJ).

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----- Original Message ----
> From: Erez Zarum <>
> To:
> Sent: Wed, February 9, 2011 4:31:53 AM
> Subject: high cpu usage
> Hello,
> We have been running read only solr instances for a few months now,  yesterday 
>i have noticed an high cpu usage coming from the JVM, it simply use  100% of the 
>CPU for no reason.
> Nothing was changed, we are using Jetty as a  Servlet container for solr.
> Where can i start looking what cause it? it has  been using 100% CPU for almost 
>24 hours  now.
> Thanks,
>     Erez.

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