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From Saurabh Sharma <>
Subject very high query time on solr due to high CPU usage
Date Sat, 11 May 2019 14:05:06 GMT
Hi All ,

I have been observing a very unique pattern in our solr resource usage.
I am running a cluster with 3 nodes and RAM on each node is 12GB.
We are doing hard commits every 1 minute and soft commits every 15 seconds.
Under normal circumstances solr response time is ~15 ms and CPU usage of
around 200% (~2 cores) . But we have few instances where CPU load suddenly
increase to around 2000%(~ 20 cores) and response time increase to 1000ms
.At the time this situation happen , almost every query start taking time
and CPU usage keeps on increasing for around 30 mins and even restart don't
help. RAM usage remains constant for this duration.Do solr start behaving
like this under high traffic situations ? what can be the possible reasons
of very high CPU usage in real time solr.

I am using solr 7.3.1 and java 8 .


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