Support running the tests in the background.

h2/src/test/org/h2/test/TestAll.java

@@ -290,6 +290,11 @@ java org.h2.test.TestAll timer
      */
     int throttle;
 
+    /**
+     * The THROTTLE value to use by default.
+     */
+    int throttleDefault = Integer.parseInt(System.getProperty("throttle", "0"));
+
     /**
      * If the test should stop when the first error occurs.
      */

h2/src/test/org/h2/test/TestBase.java

@@ -271,7 +271,9 @@ public abstract class TestBase {
             url = addOption(url, "TRACE_MAX_FILE_SIZE", "8");
         }
         url = addOption(url, "LOG", "1");
-        if (config.throttle > 0) {
+        if (config.throttleDefault > 0) {
+            url = addOption(url, "THROTTLE", "" + config.throttleDefault);
+        } else if (config.throttle > 0) {
             url = addOption(url, "THROTTLE", "" + config.throttle);
         }
         url = addOption(url, "LOCK_TIMEOUT", "50");

h2/src/test/org/h2/test/db/TestTriggersConstraints.java

@@ -75,7 +75,7 @@ public class TestTriggersConstraints extends TestBase implements Trigger {
         stat2.execute("update test set id = 2");
         Task task = new Task() {
             public void call() throws Exception {
-                Thread.sleep(200);
+                Thread.sleep(300);
                 stat2.execute("update test2 set id = 4");
             }
         };