release-request-9895929f-72dd-4267-a156-4b10e81860cc-for-git_oc-dr1-release-4017822 snap-temp-L62700000064957491
Change-Id: Ie002748053987d0b6828994197144fff5fb6a25d
diff --git a/include/jemalloc/internal/arena.h b/include/jemalloc/internal/arena.h
index 0792951..9e4bf04 100644
--- a/include/jemalloc/internal/arena.h
+++ b/include/jemalloc/internal/arena.h
@@ -30,13 +30,16 @@
purge_mode_limit = 2
} purge_mode_t;
/* ANDROID change */
-/* 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.
+/* Use the decay mode purge method.
+ * Setting this value to zero results in performance issues because it
+ * causes purges at every free. Leave the default at zero, but zygote
+ * processes will set this to one using mallopt. This allows apps which
+ * tend to be active to benefit from the extra performance, but allow system
+ * servers to free PSS while they are sitting idle.
*/
#define PURGE_DEFAULT purge_mode_decay
/* Default decay time in seconds. */
-#define DECAY_TIME_DEFAULT 1
+#define DECAY_TIME_DEFAULT 0
/* End ANDROID change */
/* Number of event ticks between time checks. */
#define DECAY_NTICKS_PER_UPDATE 1000
