diff --git a/Android.bp b/Android.bp
index 18a1e6a..a6ab9dc 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
@@ -43,11 +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_ALWAYS_PURGE",
-    "-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",
 ]
 
@@ -59,7 +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/Android.mk b/Android.mk
index 43cb8a1..34f2681 100644
--- a/Android.mk
+++ b/Android.mk
@@ -24,8 +24,6 @@
 	-Wno-type-limits \
 
 # 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
@@ -45,16 +43,22 @@
 #     usually decreases the amount of PSS used, but can increase
 #     fragmentation.
 jemalloc_common_cflags += \
-	-DANDROID_ALWAYS_PURGE \
-	-DANDROID_MAX_ARENAS=2 \
-	-DANDROID_TCACHE_NSLOTS_SMALL_MAX=8 \
-	-DANDROID_TCACHE_NSLOTS_LARGE=16 \
 	-DANDROID_LG_TCACHE_MAXCLASS_DEFAULT=16 \
 
-# Only enable the tcache on non-svelte configurations, to save PSS.
-ifneq ($(MALLOC_SVELTE),true)
+ifeq ($(MALLOC_SVELTE),true)
+# Use a single arena on svelte devices to keep the PSS consumption as low
+# as possible.
 jemalloc_common_cflags += \
-	-DJEMALLOC_TCACHE
+	-DANDROID_MAX_ARENAS=1 \
+
+else
+# Only enable the tcache on non-svelte configurations, to save PSS.
+jemalloc_common_cflags += \
+	-DANDROID_MAX_ARENAS=2 \
+	-DJEMALLOC_TCACHE \
+	-DANDROID_TCACHE_NSLOTS_SMALL_MAX=8 \
+	-DANDROID_TCACHE_NSLOTS_LARGE=16 \
+
 endif
 
 # Use a 512K chunk size on 32 bit systems.
diff --git a/include/jemalloc/internal/arena.h b/include/jemalloc/internal/arena.h
index f234ec6..47096b4 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