First 1 processor went to 0% idle and then 73 seconds later the 2nd processor also went to 0%, and stayed down.
Looking at our vmstat logs, this happened yesterday at 2:06 PM, but amazingly, nobody complained about the system being unusually slow until this afternoon, at which point we restarted JBoss. Here are the facts: - Throughout this time, the system still responded to requests, most of the time very quickly, but sometimes not at all. - vmstat shows an almost constant 0% idle, the only exceptions being about 10 blibs per minute going up to 7% idle, and going to 50% idle for 2.5 seconds at exactly-60-second intervals. - We have a two processor machine. - At the time we restarted, the JVM was running about 490 threads. - We have maxProcessors set to 200. - Along with the drop to 0% idle, the context switches reported by vmstat jumped from an average of about 1000 per second to an average of about 300,000 per second. - This is the first time this has happened on a system that has been running under JBoss for 2.5 years, with steadily increasing traffic. - Last application patch was a minor one two days ago; last major patch was 2 months ago. - DB load and web server load during this whole time was normal. What could it be? An infinite loop in newly deployed code? A JBoss configuration setting that's reached a threshhold? An OS setting? Many thanks, nwc View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=3876362#3876362 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=3876362 ------------------------------------------------------- This SF.Net email is sponsored by: NEC IT Guy Games. Get your fingers limbered up and give it your best shot. 4 great events, 4 opportunities to win big! Highest score wins.NEC IT Guy Games. Play to win an NEC 61 plasma display. Visit http://www.necitguy.com/?r=20 _______________________________________________ JBoss-user mailing list JBoss-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jboss-user
