How to set LS_HEAP_SIZE?

[pvledoux]

In docker-compose.yml, I tried

environment:
  - "LS_HEAP_SIZE=3g"

But I still have 1g in the status of Logstash:

{
  "version": "5.3.0",
  "http_address": "0.0.0.0:9600",
  "jvm": {
    "pid": 1,
    "version": "1.8.0_121",
    "vm_name": "OpenJDK 64-Bit Server VM",
    "vm_version": "1.8.0_121",
    "vm_vendor": "Oracle Corporation",
    "start_time_in_millis": 1493031633901,
    "mem": {
      "heap_init_in_bytes": 268435456,
      "heap_max_in_bytes": 1037959168,
      "non_heap_init_in_bytes": 2555904,
      "non_heap_max_in_bytes": 0
    },
    "gc_collectors": [
      "ParNew",
      "ConcurrentMarkSweep"
    ]
  }
}

[ghost]

Looking at the current implementation, it seems that specific JVM options like LS_HEAP_SIZE have been dropped in favour of the generic LS_JAVA_OPTS, which allows passing arbitrary arguments to the JVM. As a result, this will work in docker-compose.yml:

  environment:
        - LS_JAVA_OPTS=-Xmx3g

$ curl -s localhost:9600/_node/jvm | jq .jvm.mem.heap_max_in_bytes
3186360320

[pvledoux]

It works, thanks!

[CpuID]

Note this does not work as of 5.6.4.

[cafuego]

Setting LS_JAVA_OPTS works fine in 5.6.5.