Enable the Panama Vector module

distribution/src/config/jvm.options

@@ -54,6 +54,10 @@
 ## JVM temporary directory
 -Djava.io.tmpdir=${ES_TMPDIR}
 
+# Leverages accelerated vector hardware instructions; removing this may
+# result in less optimal vector performance
+20:--add-modules=jdk.incubator.vector
+
 ## heap dumps
 
 # generate a heap dump when an allocation from the Java heap fails; heap dumps

distribution/tools/server-cli/src/main/java/org/elasticsearch/server/cli/ErrorPumpThread.java

@@ -16,6 +16,7 @@
 import java.io.InputStreamReader;
 import java.io.PrintWriter;
 import java.nio.charset.StandardCharsets;
+import java.util.List;
 import java.util.concurrent.CountDownLatch;
 
 import static org.elasticsearch.bootstrap.BootstrapInfo.SERVER_READY_MARKER;
@@ -68,6 +69,9 @@ void drain() {
         nonInterruptibleVoid(this::join);
     }
 
+    /** List of messages / lines to filter from the output. */
+    List<String> filter = List.of("WARNING: Using incubator modules: jdk.incubator.vector");
+
     @Override
     public void run() {
         try {
@@ -76,7 +80,7 @@ public void run() {
                 if (line.isEmpty() == false && line.charAt(0) == SERVER_READY_MARKER) {
                     ready = true;
                     readyOrDead.countDown();
-                } else {
+                } else if (filter.contains(line) == false) {
                     writer.println(line);
                 }
             }

docs/changelog/96453.yaml

@@ -0,0 +1,5 @@
+pr: 96453
+summary: Leverage SIMD hardware instructions in Vector Search
+area: Vector Search
+type: enhancement
+issues: [96370]

server/src/main/java/org/elasticsearch/common/logging/LogConfigurator.java

@@ -269,8 +269,9 @@ public FileVisitResult visitFile(final Path file, final BasicFileAttributes attr
                     LogManager.getLogger("stderr"),
                     Level.WARN,
                     // MMapDirectory messages come from Lucene, suggesting to users as a warning that they should enable preview features in
-                    // the JDK
-                    List.of("MMapDirectory")
+                    // the JDK. Vector logs come from Lucene too, but only if the used explicitly disables the Vector API - no point warning
+                    // in this case.
+                    List.of("MMapDirectory", "VectorUtilProvider", "WARNING: Java vector incubator module is not readable")
                 ),
                 false,
                 StandardCharsets.UTF_8