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  1. Cloud Enablement
  2. CLOUD-2286

Ability to change the garbage collector in Java S2I image

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    • CLOUD Maintenance Sprint 23

      Would be good to allow users to change the garbage collector when using the Java S2I image. Adding a different collector via JAVA_OPTS_APPEND does not take effect.

      Currently the garbage collector is set in this script with no option to change it:
      https://github.com/jboss-openshift/cct_module/blob/1.0/os-java-run/added/java-default-options#L121

      gc_config() {
  local minHeapFreeRatio=${GC_MIN_HEAP_FREE_RATIO:-20}
  local maxHeapFreeRatio=${GC_MAX_HEAP_FREE_RATIO:-40}
  local timeRatio=${GC_TIME_RATIO:-4}
  local adaptiveSizePolicyWeight=${GC_ADAPTIVE_SIZE_POLICY_WEIGHT:-90}
  local maxMetaspaceSize=${GC_MAX_METASPACE_SIZE:-100}

  echo "-XX:+UseParallelGC " \
       "-XX:MinHeapFreeRatio=${minHeapFreeRatio} "\
       "-XX:MaxHeapFreeRatio=${maxHeapFreeRatio} "\
       "-XX:GCTimeRatio=${timeRatio} "\
       "-XX:AdaptiveSizePolicyWeight=${adaptiveSizePolicyWeight} "\
       "-XX:MaxMetaspaceSize=${maxMetaspaceSize}m"
}

error_handling() {
  echo "-XX:+ExitOnOutOfMemoryError"
}

initialize_container_limits > /dev/null

## Echo options, trimming trailing and multiple spaces
echo "$(initial_memory) $(max_memory) $(gc_config) $(diagnostics) $(cpu_core_tunning) $(error_handling)" | awk '$1=$1'

              jdowland@redhat.com Jonathan Dowland
              rhn-support-trogers Travis Rogers (Inactive)
              Petr Nehyba Petr Nehyba (Inactive)
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                Created:
                Updated:
                Resolved: