diff --git a/.circleci/config.yml b/.circleci/config.yml
index 4679fea4..54efe0bc 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -76,11 +76,12 @@ jobs:
 
   unit-test:
     docker: [{ image: 'circleci/openjdk:8u222-stretch-node' }]
+    resource_class: large
     environment:
       CIRCLE_TEST_REPORTS: /home/circleci/junit
       CIRCLE_ARTIFACTS: /home/circleci/artifacts
-      GRADLE_OPTS: -Dorg.gradle.jvmargs='-Xms3072m -Xmx3072m'
-      _JAVA_OPTIONS: -XX:ActiveProcessorCount=2 -XX:ErrorFile=/home/circleci/artifacts/hs_err_pid%p.log -XX:HeapDumpPath=/home/circleci/artifacts
+      GRADLE_OPTS: -Dorg.gradle.jvmargs='-XX:MaxMetaspaceSize=256m' -Dorg.gradle.workers.max=4
+      _JAVA_OPTIONS: -XX:ActiveProcessorCount=4 -Xmx1382m -XX:MaxMetaspaceSize=256m -XX:ErrorFile=/home/circleci/artifacts/hs_err_pid%p.log -XX:HeapDumpPath=/home/circleci/artifacts
     steps:
       - attach_workspace: { at: /home/circleci }
       - restore_cache: { key: 'gradle-wrapper-v2-{{ checksum "gradle/wrapper/gradle-wrapper.properties" }}' }
@@ -101,8 +102,8 @@ jobs:
     environment:
       CIRCLE_TEST_REPORTS: /home/circleci/junit
       CIRCLE_ARTIFACTS: /home/circleci/artifacts
-      GRADLE_OPTS: -Dorg.gradle.jvmargs='-Xms6144m -Xmx6144m'
-      _JAVA_OPTIONS: -XX:ActiveProcessorCount=4 -XX:ErrorFile=/home/circleci/artifacts/hs_err_pid%p.log -XX:HeapDumpPath=/home/circleci/artifacts
+      GRADLE_OPTS: -Dorg.gradle.jvmargs='-XX:MaxMetaspaceSize=256m' -Dorg.gradle.workers.max=4
+      _JAVA_OPTIONS: -XX:ActiveProcessorCount=4 -Xmx1382m -XX:MaxMetaspaceSize=256m  -XX:ErrorFile=/home/circleci/artifacts/hs_err_pid%p.log -XX:HeapDumpPath=/home/circleci/artifacts
     steps:
       - checkout
       - restore_cache: { key: 'gradle-wrapper-v2-{{ checksum "gradle/wrapper/gradle-wrapper.properties" }}' }