diff --git a/logstash/defaults/main.yml b/logstash/defaults/main.yml
index 461a03c7..456769cd 100644
--- a/logstash/defaults/main.yml
+++ b/logstash/defaults/main.yml
@@ -2,7 +2,7 @@
 elastic_stack_version: "6.x"
 
 logstash_jvm_xms: 256m
-logstash_jvm_xmx: 1g
+logstash_jvm_xmx: 512g
 logstash_log_rotate_days: 365
 logstash_custom_tmpdir: Null
 logstash_default_tmpdir: /var/lib/logstash/tmp