diff --git a/Android.bp b/Android.bp
index f65c934..3d55e6f 100644
--- a/Android.bp
+++ b/Android.bp
@@ -23,8 +23,6 @@
 ]
 
 // These parameters change the way jemalloc works.
-//   ANDROID_ALWAYS_PURGE
-//     If defined, always purge immediately when a page is purgeable.
 //   ANDROID_MAX_ARENAS=XX
 //     The total number of arenas will be less than or equal to this number.
 //     The number of arenas will be calculated as 2 * the number of cpus
@@ -43,10 +41,11 @@
 //     1 << XX is the default chunk size used by the system. Decreasing this
 //     usually decreases the amount of PSS used, but can increase
 //     fragmentation.
+
+// Default to a single arena for svelte configurations to minimize
+// PSS consumed by jemalloc.
 common_cflags += [
-    "-DANDROID_MAX_ARENAS=2",
-    "-DANDROID_TCACHE_NSLOTS_SMALL_MAX=8",
-    "-DANDROID_TCACHE_NSLOTS_LARGE=16",
+    "-DANDROID_MAX_ARENAS=1",
     "-DANDROID_LG_TCACHE_MAXCLASS_DEFAULT=16",
 ]
 
@@ -58,7 +57,13 @@
 common_product_variables = {
     // Only enable the tcache on non-svelte configurations, to save PSS.
     malloc_not_svelte: {
-        cflags: ["-DJEMALLOC_TCACHE"],
+        cflags: [
+            "-UANDROID_MAX_ARENAS",
+            "-DANDROID_MAX_ARENAS=2",
+            "-DJEMALLOC_TCACHE",
+            "-DANDROID_TCACHE_NSLOTS_SMALL_MAX=8",
+            "-DANDROID_TCACHE_NSLOTS_LARGE=16",
+        ],
     },
 }
 
diff --git a/include/jemalloc/internal/arena.h b/include/jemalloc/internal/arena.h
index a8819f9..4062660 100644
--- a/include/jemalloc/internal/arena.h
+++ b/include/jemalloc/internal/arena.h
@@ -30,12 +30,13 @@
 	purge_mode_limit = 2
 } purge_mode_t;
 /* ANDROID change */
-/* Use the decay mode purge method. By setting the DECAY_TIME_DEFAULT to
- * zero, this forces all pages to be purged as soon as they are not in use.
+/* Use the decay mode purge method. Do not set this value to zero, since
+ * forcing a purge immediately affects performance negatively. Using a
+ * small value provides a compromise between performance and extra PSS.
  */
 #define	PURGE_DEFAULT		purge_mode_decay
 /* Default decay time in seconds. */
-#define	DECAY_TIME_DEFAULT	0
+#define	DECAY_TIME_DEFAULT	1
 /* End ANDROID change */
 /* Number of event ticks between time checks. */
 #define	DECAY_NTICKS_PER_UPDATE	1000