diff --git a/script/etc/nbcode.conf b/script/etc/nbcode.conf
index 699e4c9..a0c5897 100644
--- a/script/etc/nbcode.conf
+++ b/script/etc/nbcode.conf
@@ -58,7 +58,7 @@ default_cachedir="${DEFAULT_CACHEDIR_ROOT}/dev"
 
 # options used by the launcher by default, can be overridden by explicit
 # command line switches
-default_options="--nogui --nosplash --branding nbcode -J-Xmx1G -J-XX:+UseParallelGC -J-XX:GCTimeRatio=4 -J-XX:AdaptiveSizePolicyWeight=90 -J-Djava.awt.headless=true -J-DTopSecurityManager.disable=true -J--add-opens=java.base/java.net=ALL-UNNAMED -J--add-opens=java.base/java.lang.ref=ALL-UNNAMED -J--add-opens=java.base/java.lang=ALL-UNNAMED -J--add-opens=java.base/java.security=ALL-UNNAMED -J--add-opens=java.base/java.util=ALL-UNNAMED -J--add-opens=java.desktop/javax.swing.plaf.basic=ALL-UNNAMED -J--add-opens=java.desktop/javax.swing.text=ALL-UNNAMED -J--add-opens=java.desktop/javax.swing=ALL-UNNAMED -J--add-opens=java.desktop/java.awt=ALL-UNNAMED -J--add-opens=java.desktop/java.awt.event=ALL-UNNAMED -J--add-opens=java.prefs/java.util.prefs=ALL-UNNAMED -J--add-opens=jdk.jshell/jdk.jshell=ALL-UNNAMED -J--add-modules=jdk.jshell -J--add-exports=java.desktop/sun.awt=ALL-UNNAMED -J--add-exports=java.desktop/java.awt.peer=ALL-UNNAMED -J--add-exports=java.desktop/com.sun.beans.editors=ALL-UNNAMED -J--add-exports=java.desktop/sun.swing=ALL-UNNAMED -J--add-exports=java.desktop/sun.awt.im=ALL-UNNAMED -J--add-exports=jdk.internal.jvmstat/sun.jvmstat.monitor=ALL-UNNAMED -J--add-exports=java.management/sun.management=ALL-UNNAMED -J--add-exports=java.base/sun.reflect.annotation=ALL-UNNAMED -J--add-exports=jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED -J--add-exports=jdk.compiler/com.sun.tools.javac.code=ALL-UNNAMED -J--add-exports=jdk.compiler/com.sun.tools.javac.comp=ALL-UNNAMED -J--add-exports=jdk.compiler/com.sun.tools.javac.file=ALL-UNNAMED -J--add-exports=jdk.compiler/com.sun.tools.javac.jvm=ALL-UNNAMED -J--add-exports=jdk.compiler/com.sun.tools.javac.main=ALL-UNNAMED -J--add-exports=jdk.compiler/com.sun.tools.javac.model=ALL-UNNAMED -J--add-exports=jdk.compiler/com.sun.tools.javac.parser=ALL-UNNAMED -J--add-exports=jdk.compiler/com.sun.tools.javac.processing=ALL-UNNAMED -J--add-exports=jdk.compiler/com.sun.tools.javac.tree=ALL-UNNAMED -J--add-exports=jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED  -J--add-opens=jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED -J--add-opens=jdk.compiler/com.sun.tools.javac.code=ALL-UNNAMED -J--add-opens=jdk.compiler/com.sun.tools.javac.comp=ALL-UNNAMED -J--add-opens=jdk.compiler/com.sun.tools.javac.file=ALL-UNNAMED -J--add-opens=jdk.compiler/com.sun.tools.javac.jvm=ALL-UNNAMED -J--add-opens=jdk.compiler/com.sun.tools.javac.main=ALL-UNNAMED -J--add-opens=jdk.compiler/com.sun.tools.javac.model=ALL-UNNAMED -J--add-opens=jdk.compiler/com.sun.tools.javac.parser=ALL-UNNAMED -J--add-opens=jdk.compiler/com.sun.tools.javac.processing=ALL-UNNAMED -J--add-opens=jdk.compiler/com.sun.tools.javac.tree=ALL-UNNAMED -J--add-opens=jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED -J--add-exports=jdk.jdeps/com.sun.tools.classfile=ALL-UNNAMED -J--add-exports=jdk.jdeps/com.sun.tools.javap=ALL-UNNAMED -J-XX:+IgnoreUnrecognizedVMOptions"
+default_options="--nogui --nosplash --branding nbcode -J-Djava.awt.headless=true -J-DTopSecurityManager.disable=true -J--add-opens=java.base/java.net=ALL-UNNAMED -J--add-opens=java.base/java.lang.ref=ALL-UNNAMED -J--add-opens=java.base/java.lang=ALL-UNNAMED -J--add-opens=java.base/java.security=ALL-UNNAMED -J--add-opens=java.base/java.util=ALL-UNNAMED -J--add-opens=java.desktop/javax.swing.plaf.basic=ALL-UNNAMED -J--add-opens=java.desktop/javax.swing.text=ALL-UNNAMED -J--add-opens=java.desktop/javax.swing=ALL-UNNAMED -J--add-opens=java.desktop/java.awt=ALL-UNNAMED -J--add-opens=java.desktop/java.awt.event=ALL-UNNAMED -J--add-opens=java.prefs/java.util.prefs=ALL-UNNAMED -J--add-opens=jdk.jshell/jdk.jshell=ALL-UNNAMED -J--add-modules=jdk.jshell -J--add-exports=java.desktop/sun.awt=ALL-UNNAMED -J--add-exports=java.desktop/java.awt.peer=ALL-UNNAMED -J--add-exports=java.desktop/com.sun.beans.editors=ALL-UNNAMED -J--add-exports=java.desktop/sun.swing=ALL-UNNAMED -J--add-exports=java.desktop/sun.awt.im=ALL-UNNAMED -J--add-exports=jdk.internal.jvmstat/sun.jvmstat.monitor=ALL-UNNAMED -J--add-exports=java.management/sun.management=ALL-UNNAMED -J--add-exports=java.base/sun.reflect.annotation=ALL-UNNAMED -J--add-exports=jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED -J--add-exports=jdk.compiler/com.sun.tools.javac.code=ALL-UNNAMED -J--add-exports=jdk.compiler/com.sun.tools.javac.comp=ALL-UNNAMED -J--add-exports=jdk.compiler/com.sun.tools.javac.file=ALL-UNNAMED -J--add-exports=jdk.compiler/com.sun.tools.javac.jvm=ALL-UNNAMED -J--add-exports=jdk.compiler/com.sun.tools.javac.main=ALL-UNNAMED -J--add-exports=jdk.compiler/com.sun.tools.javac.model=ALL-UNNAMED -J--add-exports=jdk.compiler/com.sun.tools.javac.parser=ALL-UNNAMED -J--add-exports=jdk.compiler/com.sun.tools.javac.processing=ALL-UNNAMED -J--add-exports=jdk.compiler/com.sun.tools.javac.tree=ALL-UNNAMED -J--add-exports=jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED -J--add-opens=jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED -J--add-opens=jdk.compiler/com.sun.tools.javac.code=ALL-UNNAMED -J--add-opens=jdk.compiler/com.sun.tools.javac.comp=ALL-UNNAMED -J--add-opens=jdk.compiler/com.sun.tools.javac.file=ALL-UNNAMED -J--add-opens=jdk.compiler/com.sun.tools.javac.jvm=ALL-UNNAMED -J--add-opens=jdk.compiler/com.sun.tools.javac.main=ALL-UNNAMED -J--add-opens=jdk.compiler/com.sun.tools.javac.model=ALL-UNNAMED -J--add-opens=jdk.compiler/com.sun.tools.javac.parser=ALL-UNNAMED -J--add-opens=jdk.compiler/com.sun.tools.javac.processing=ALL-UNNAMED -J--add-opens=jdk.compiler/com.sun.tools.javac.tree=ALL-UNNAMED -J--add-opens=jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED -J--add-exports=jdk.jdeps/com.sun.tools.classfile=ALL-UNNAMED -J--add-exports=jdk.jdeps/com.sun.tools.javap=ALL-UNNAMED"
 
 # for development purposes you may wish to append: -J-Dnetbeans.logger.console=true -J-ea
 
diff --git a/vscode/package.json b/vscode/package.json
index 3ee87d2..c15846a 100644
--- a/vscode/package.json
+++ b/vscode/package.json
@@ -139,6 +139,12 @@
 					"description": "Specifies the JDK on which user's project will be run. Defaults to the value of netbeans.jdkhome",
 					"scope": "machine-overridable"
 				},
+				"netbeans.serverVmOptions": {
+					"type": "array",
+					"default": [],
+					"description": "Specifies extra VM arguments used to launch the Apache NetBeans Language Server",
+					"scope": "machine-overridable"
+				},
 				"netbeans.verbose": {
 					"type": "boolean",
 					"default": false,
diff --git a/vscode/src/extension.ts b/vscode/src/extension.ts
index 14294c2..946c08b 100644
--- a/vscode/src/extension.ts
+++ b/vscode/src/extension.ts
@@ -181,6 +181,23 @@ export function awaitClient() : Promise<NbLanguageClient> {
 function findJDK(onChange: (path : string | null) => void): void {
     let nowDark : boolean = isDarkColorTheme();
     let nowJavaEnabled : boolean = isJavaSupportEnabled();
+    function sameStringArray(a: string[] | undefined, b: string[] | undefined): boolean {
+        const aa = a || [];
+        const bb = b || [];
+        if (aa.length !== bb.length) {
+            return false;
+        }
+        for (let i = 0; i < aa.length; i++) {
+            if (aa[i] !== bb[i]) {
+                return false;
+            }
+        }
+        return true;
+    }
+    function getServerVmOptions(): string[] {
+        const raw = workspace.getConfiguration('netbeans')?.get('serverVmOptions', []);
+        return Array.isArray(raw) ? (raw as any[]).map(String) : [];
+    }
     function find(): string | null {
         let nbJdk = workspace.getConfiguration('netbeans').get('jdkhome');
         if (nbJdk) {
@@ -204,6 +221,7 @@ function findJDK(onChange: (path : string | null) => void): void {
 
     let currentJdk = find();
     let projectJdk : string | undefined = getProjectJDKHome();
+    let serverVmOptions: string[] = getServerVmOptions();
     validateJDKCompatibility(projectJdk);
     let timeout: NodeJS.Timeout | undefined = undefined;
     workspace.onDidChangeConfiguration(params => {
@@ -228,11 +246,13 @@ function findJDK(onChange: (path : string | null) => void): void {
             let newD = isDarkColorTheme();
             let newJavaEnabled = isJavaSupportEnabled();
             let newProjectJDK : string | undefined = getProjectJDKHome();
-            if (newJdk !== currentJdk || newD != nowDark || newJavaEnabled != nowJavaEnabled || newProjectJDK != projectJdk) {
+            let newServerVmOptions: string[] = getServerVmOptions();
+            if (newJdk !== currentJdk || newD != nowDark || newJavaEnabled != nowJavaEnabled || newProjectJDK != projectJdk || !sameStringArray(newServerVmOptions, serverVmOptions)) {
                 nowDark = newD;
                 nowJavaEnabled = newJavaEnabled;
                 currentJdk = newJdk;
                 projectJdk = newProjectJDK;
+                serverVmOptions = newServerVmOptions;
                 onChange(currentJdk);
             }
         }, 0);
@@ -1316,7 +1336,12 @@ function doActivateWithJDK(promise: Promise<NbLanguageClient>, specifiedJDK: str
         });
         server.listen(() => {
             const address: any = server.address();
-            let extras : string[] = ["--modules", "-J-XX:PerfMaxStringConstLength=10240"];
+            let extras : string[] = [];
+            const rawVmOptions = netbeansConfig.get('serverVmOptions', []);
+            if (Array.isArray(rawVmOptions)) {
+                extras.push(...(rawVmOptions as any[]).map((el) => `-J${el}`));
+            }
+            extras.push("--modules", "-J-XX:PerfMaxStringConstLength=10240");
             if (isDarkColorTheme()) {
                 extras.push('--laf', 'com.formdev.flatlaf.FlatDarkLaf');
             }