From f7e4377de5b04a75e76e8b53fbfc36eeb3e24b37 Mon Sep 17 00:00:00 2001
From: Neng Lu <nlu@streamnative.io>
Date: Tue, 5 Dec 2023 09:36:17 -0800
Subject: [PATCH] optimize jvm parameters

---
 controllers/spec/common.go | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/controllers/spec/common.go b/controllers/spec/common.go
index dda1fa02..18874702 100644
--- a/controllers/spec/common.go
+++ b/controllers/spec/common.go
@@ -1113,7 +1113,6 @@ func getProcessJavaRuntimeArgs(name, packageName, clusterName, logLevel, details
 			},
 			" ")
 	}
-	xmsMemory := resource.NewScaledQuantity(memory.Value()/2, 0)
 	args := []string{
 		"exec",
 		"java",
@@ -1124,9 +1123,12 @@ func getProcessJavaRuntimeArgs(name, packageName, clusterName, logLevel, details
 		"-Dpulsar.function.log.dir=logs/functions",
 		"-Dpulsar.function.log.file=" + fmt.Sprintf("%s-${%s}", name, EnvShardID),
 		setLogLevel,
-		"-Xmx" + getDecimalSIMemory(memory),
-		"-Xms" + getDecimalSIMemory(xmsMemory),
+		"-XX:InitialRAMPercentage=20",
+		"-XX:MaxRAMPercentage=40",
 		"-XX:+UseG1GC",
+		"-XX:+HeapDumpOnOutOfMemoryError",
+		"-XX:HeapDumpPath=/pulsar/tmp/heapdump-%p.hprof",
+		"-Xlog:gc*:file=/pulsar/logs/gc.log:time,level,tags:filecount=5,filesize=10M",
 		strings.Join(javaOpts, " "),
 		"org.apache.pulsar.functions.instance.JavaInstanceMain",
 		"--jar",