diff --git a/samples/androidNativeActivity/gradle.properties b/samples/androidNativeActivity/gradle.properties
index 51b47f2ae23..549b800b9cc 100644
--- a/samples/androidNativeActivity/gradle.properties
+++ b/samples/androidNativeActivity/gradle.properties
@@ -1,8 +1,9 @@
 kotlin.code.style=official
 
 # Run parallel builds in Gradle:
-org.gradle.parallel=true
-org.gradle.workers.max=4
+# TODO: Enable parallel build when KT-37550 is fixed.
+#org.gradle.parallel=true
+#org.gradle.workers.max=4
 
 # Pin Kotlin version:
 # CHANGE_VERSION_WITH_RELEASE
@@ -10,3 +11,6 @@ kotlin_version=1.3.70
 
 # Use custom Kotlin/Native home:
 org.jetbrains.kotlin.native.home=../../dist
+
+# Increase memory for in-process compiler execution.
+org.gradle.jvmargs=-Xmx3g
diff --git a/samples/calculator/gradle.properties b/samples/calculator/gradle.properties
index 6edb466a54e..2e0a002a29f 100644
--- a/samples/calculator/gradle.properties
+++ b/samples/calculator/gradle.properties
@@ -1,8 +1,9 @@
 kotlin.code.style=official
 
 # Run parallel builds in Gradle:
-org.gradle.parallel=true
-org.gradle.workers.max=4
+# TODO: Enable parallel build when KT-37550 is fixed.
+#org.gradle.parallel=true
+#org.gradle.workers.max=4
 
 # Pin Kotlin version:
 # CHANGE_VERSION_WITH_RELEASE
@@ -10,3 +11,6 @@ kotlin_version=1.3.70
 
 # Use custom Kotlin/Native home:
 org.jetbrains.kotlin.native.home=../../../dist
+
+# Increase memory for in-process compiler execution.
+org.gradle.jvmargs=-Xmx3g
diff --git a/samples/cocoapods/kotlin-library/gradle.properties b/samples/cocoapods/kotlin-library/gradle.properties
index 6edb466a54e..2e0a002a29f 100644
--- a/samples/cocoapods/kotlin-library/gradle.properties
+++ b/samples/cocoapods/kotlin-library/gradle.properties
@@ -1,8 +1,9 @@
 kotlin.code.style=official
 
 # Run parallel builds in Gradle:
-org.gradle.parallel=true
-org.gradle.workers.max=4
+# TODO: Enable parallel build when KT-37550 is fixed.
+#org.gradle.parallel=true
+#org.gradle.workers.max=4
 
 # Pin Kotlin version:
 # CHANGE_VERSION_WITH_RELEASE
@@ -10,3 +11,6 @@ kotlin_version=1.3.70
 
 # Use custom Kotlin/Native home:
 org.jetbrains.kotlin.native.home=../../../dist
+
+# Increase memory for in-process compiler execution.
+org.gradle.jvmargs=-Xmx3g
diff --git a/samples/gradle.properties b/samples/gradle.properties
index a96ba6a0f66..11d7eed5e54 100644
--- a/samples/gradle.properties
+++ b/samples/gradle.properties
@@ -1,7 +1,8 @@
 kotlin.code.style=official
 
 # Run parallel builds in Gradle:
-org.gradle.parallel=true
+# TODO: Enable parallel build when KT-37550 is fixed.
+#org.gradle.parallel=true
 
 # Pin Kotlin version:
 # CHANGE_VERSION_WITH_RELEASE
@@ -10,3 +11,6 @@ kotlin_version=1.3.70
 # Use custom Kotlin/Native home:
 org.jetbrains.kotlin.native.home=../../dist
 org.gradle.workers.max=4
+
+# Increase memory for in-process compiler execution.
+org.gradle.jvmargs=-Xmx3g