From 933f7bd8aca9969315d7c5444209f675de50f23e Mon Sep 17 00:00:00 2001
From: Brian Seeders <brian.seeders@elastic.co>
Date: Fri, 18 Dec 2020 19:55:56 -0500
Subject: [PATCH] Explicitly set Elasticsearch heap size during CI and local
 development (#86513) (#86575)

---
 packages/kbn-es/src/cluster.js | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/packages/kbn-es/src/cluster.js b/packages/kbn-es/src/cluster.js
index 68bcc37c65600..eaf353b3e55d0 100644
--- a/packages/kbn-es/src/cluster.js
+++ b/packages/kbn-es/src/cluster.js
@@ -275,6 +275,15 @@ exports.Cluster = class Cluster {
 
     this._log.debug('%s %s', ES_BIN, args.join(' '));
 
+    options.esEnvVars = options.esEnvVars || {};
+
+    // ES now automatically sets heap size to 50% of the machine's available memory
+    // so we need to set it to a smaller size for local dev and CI
+    // especially because we currently run many instances of ES on the same machine during CI
+    options.esEnvVars.ES_JAVA_OPTS =
+      (options.esEnvVars.ES_JAVA_OPTS ? `${options.esEnvVars.ES_JAVA_OPTS} ` : '') +
+      '-Xms1g -Xmx1g';
+
     this._process = execa(ES_BIN, args, {
       cwd: installPath,
       env: {