Based on the behavior you describe and the version you're running, it might be worth taking a look at https://issues.apache.org/jira/browse/SOLR-13336
On Mon, Jan 23, 2023 at 9:39 AM Dominique Bejean <dominique.bej...@eolya.fr> wrote: > > Hi, > > On a SolrCloud 7.7 environment with 14 servers, we have one collection with > 1 billion documents. > Sharding is 7 shards x 2 replicas (TLOG) > Each solr server hosts one replica. > > Indexing and searching are permanent. > > Suddenly one of the server has CPU usage growing during 30 minutes. > Sometimes during a few minutes the CPU usage decreases on this node and > increases on other nodes. > Here is a screenshot of CPU monitoring > https://drive.google.com/file/d/1Fp9oiZ8Sl7hb97utN2JRIm7dJKh0St3H/view?usp=share_link > > WARN logs do not provide any relevant information > Customer did not generate thread dump. > > Any idea of what tasks can generate this kind of CPU behaviour ? > > Huge merge on a shard leader won't be so long and only one node will have > to synchronize, not all. > > Regards > > Dominique
