Logstash CPUAffinity

Elastic Stack Logstash
1

I am running Logstash as a service on a 16 core machine, with following conf

 curl -XGET 'localhost:9600/_node/pipelines?pretty'
{
  "host" : "0.0.0.0",
  "version" : "6.1.2",
  "http_address" : "127.0.0.1:9600",
  "id" : "8311cdf3-165c-47b4-8373-37cd2007d858",
  "name" : "0.0.0.0",
  "pipelines" : {
    "main" : {
      "workers" : 16,
      "batch_size" : 100,
      "batch_delay" : 5,
      "config_reload_automatic" : false,
      "config_reload_interval" : 3000000000,
      "dead_letter_queue_enabled" : false
    }
  }

However the machine has a "isolated cpu" setting : isolcpus=0-13
I have defined the CPUAffinity for logstash via systemctl as : CPUAffinity=0-13

My problem is that all the logstash pipeline worker threads are still running on core 0, but not being distributed among all the available cores. Please help.

2

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