diff --git a/src/com/android/contacts/ContactsApplication.java b/src/com/android/contacts/ContactsApplication.java
index 4007916..ff4ab8b 100644
--- a/src/com/android/contacts/ContactsApplication.java
+++ b/src/com/android/contacts/ContactsApplication.java
@@ -22,6 +22,7 @@
 import com.google.common.annotations.VisibleForTesting;
 
 import android.app.Application;
+import android.app.FragmentManager;
 import android.app.LoaderManager;
 import android.content.ContentResolver;
 import android.content.Context;
@@ -109,10 +110,14 @@
         Context context = getApplicationContext();
         PreferenceManager.getDefaultSharedPreferences(context);
         AccountTypeManager.getInstance(context);
-        LoaderManager.enableDebugLogging(true);
 
-        StrictMode.setThreadPolicy(
-                new StrictMode.ThreadPolicy.Builder().detectAll().penaltyLog().build());
+        LoaderManager.enableDebugLogging(Log.isLoggable(Constants.LOADER_MANAGER_TAG, Log.DEBUG));
+        FragmentManager.enableDebugLogging(
+                Log.isLoggable(Constants.FRAGMENT_MANAGER_TAG, Log.DEBUG));
+        if (Log.isLoggable(Constants.STRICT_MODE_TAG, Log.DEBUG)) {
+            StrictMode.setThreadPolicy(
+                    new StrictMode.ThreadPolicy.Builder().detectAll().penaltyLog().build());
+        }
 
         if (Log.isLoggable(Constants.PERFORMANCE_TAG, Log.DEBUG)) {
             Log.d(Constants.PERFORMANCE_TAG, "ContactsApplication.onCreate finish");
diff --git a/src/com/android/contacts/util/Constants.java b/src/com/android/contacts/util/Constants.java
index d79f029..3a43c40 100644
--- a/src/com/android/contacts/util/Constants.java
+++ b/src/com/android/contacts/util/Constants.java
@@ -25,7 +25,27 @@
     public static final String SCHEME_IMTO = "imto";
     public static final String SCHEME_SIP = "sip";
 
-    // Log tag for performance measurement.
-    // To enable: adb shell setprop log.tag.ContactsPerf VERBOSE
+    /**
+     * Log tag for performance measurement.
+     * To enable: adb shell setprop log.tag.ContactsPerf VERBOSE
+     */
     public static final String PERFORMANCE_TAG = "ContactsPerf";
+
+    /**
+     * Log tag for enabling/disabling LoaderManager log.
+     * To enable: adb shell setprop log.tag.ContactsLoaderManager DEBUG
+     */
+    public static final String LOADER_MANAGER_TAG = "ContactsLoaderManager";
+
+    /**
+     * Log tag for enabling/disabling FragmentManager log.
+     * To enable: adb shell setprop log.tag.ContactsFragmentManager DEBUG
+     */
+    public static final String FRAGMENT_MANAGER_TAG = "ContactsFragmentManager";
+
+    /**
+     * Log tag for enabling/disabling StrictMode violation log.
+     * To enable: adb shell setprop log.tag.ContactsStrictMode DEBUG
+     */
+    public static final String STRICT_MODE_TAG = "ContactsStrictMode";
 }