diff --git a/hosts/jenkins/etc/default/jenkins b/hosts/jenkins/etc/default/jenkins
index bb2a1e3102a146836598c0696df1ff5939ddc296..76cf27358c5fd113fd4235025ec15adfd7a07808 100644
--- a/hosts/jenkins/etc/default/jenkins
+++ b/hosts/jenkins/etc/default/jenkins
@@ -17,7 +17,7 @@ JAVA_ARGS="-Djava.awt.headless=true"
 #JAVA_ARGS="-Xmx256m"
 #JAVA_ARGS="-Djava.net.preferIPv4Stack=true" # make jenkins listen on IPv4 address
 # See some recommendation from https://jenkins.io/blog/2016/11/21/gc-tuning/
-JAVA_ARGS="$JAVA_ARGS -Xms4G -Xmx8G"  # heap settings
+JAVA_ARGS="$JAVA_ARGS -Xms8G -Xmx24G"  # heap settings
 JAVA_ARGS="$JAVA_ARGS -server -XX:+AlwaysPreTouch"
 # store heap dumps in case of OOM, to investigate it later
 JAVA_ARGS="$JAVA_ARGS -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=$JENKINS_HOME/heapDumps/"
@@ -30,8 +30,8 @@ JAVA_ARGS="$JAVA_ARGS -XX:+PrintGCCause -XX:+PrintTenuringDistribution -XX:+Prin
 JAVA_ARGS="$JAVA_ARGS -XX:+UseG1GC -XX:+ExplicitGCInvokesConcurrent -XX:+ParallelRefProcEnabled -XX:+UseStringDeduplication"
 JAVA_ARGS="$JAVA_ARGS -XX:+UnlockExperimentalVMOptions -XX:G1NewSizePercent=20 -XX:+UnlockDiagnosticVMOptions -XX:G1SummarizeRSetStatsPeriod=1"
 # h01ger trying stuff
-JAVA_ARGS="$JAVA_ARGS -XX:+UseCompressedOops"
-MALLOC_ARENA_MAX=2
+JAVA_ARGS="$JAVA_ARGS -XX:+UseCompressedOops -XX:+UseCompressedClassPointers"
+export MALLOC_ARENA_MAX=2
 
 # make jenkins listen on IPv4 address
 #JAVA_ARGS="-Djava.net.preferIPv4Stack=true"