diff --git a/device.mk b/device.mk
index 5f35282..e391a44 100644
--- a/device.mk
+++ b/device.mk
@@ -158,10 +158,18 @@ endif
 PRODUCT_COPY_FILES += \
     $(_FSTAB_SRC):$(TARGET_COPY_OUT_RAMDISK)/fstab.rpi4 \
     $(_FSTAB_SRC):$(TARGET_COPY_OUT_VENDOR)/etc/fstab.rpi4 \
+    $(DEVICE_PATH)/ramdisk/fstab.zram.25p:$(TARGET_COPY_OUT_VENDOR)/etc/fstab.zram.25p \
+    $(DEVICE_PATH)/ramdisk/fstab.zram.50p:$(TARGET_COPY_OUT_VENDOR)/etc/fstab.zram.50p \
+    $(DEVICE_PATH)/ramdisk/fstab.zram.75p:$(TARGET_COPY_OUT_VENDOR)/etc/fstab.zram.75p \
+    $(DEVICE_PATH)/ramdisk/fstab.zram.none:$(TARGET_COPY_OUT_VENDOR)/etc/fstab.zram.none \
     $(DEVICE_PATH)/ramdisk/init.rpi4.rc:$(TARGET_COPY_OUT_VENDOR)/etc/init/hw/init.rpi4.rc \
     $(DEVICE_PATH)/ramdisk/init.rpi4.usb.rc:$(TARGET_COPY_OUT_VENDOR)/etc/init/hw/init.rpi4.usb.rc \
     $(DEVICE_PATH)/ramdisk/ueventd.rpi4.rc:$(TARGET_COPY_OUT_VENDOR)/etc/ueventd.rc
 
+# ZRAM: default 50% of RAM as compressed swap
+PRODUCT_VENDOR_PROPERTIES += \
+    persist.vendor.zram.size=50p
+
 # Seccomp
 PRODUCT_COPY_FILES += \
     $(DEVICE_PATH)/seccomp_policy/mediacodec.policy:$(TARGET_COPY_OUT_VENDOR)/etc/seccomp_policy/mediacodec.policy \
diff --git a/ramdisk/fstab.zram.25p b/ramdisk/fstab.zram.25p
new file mode 100644
index 0000000..69cb1cd
--- /dev/null
+++ b/ramdisk/fstab.zram.25p
@@ -0,0 +1,2 @@
+#<src>            <mnt_point>  <type>  <mnt_flags and options>  <fs_mgr_flags>
+/dev/block/zram0  none         swap    defaults                 zramsize=25%
diff --git a/ramdisk/fstab.zram.50p b/ramdisk/fstab.zram.50p
new file mode 100644
index 0000000..fefb5b7
--- /dev/null
+++ b/ramdisk/fstab.zram.50p
@@ -0,0 +1,2 @@
+#<src>            <mnt_point>  <type>  <mnt_flags and options>  <fs_mgr_flags>
+/dev/block/zram0  none         swap    defaults                 zramsize=50%
diff --git a/ramdisk/fstab.zram.75p b/ramdisk/fstab.zram.75p
new file mode 100644
index 0000000..e61a21d
--- /dev/null
+++ b/ramdisk/fstab.zram.75p
@@ -0,0 +1,2 @@
+#<src>            <mnt_point>  <type>  <mnt_flags and options>  <fs_mgr_flags>
+/dev/block/zram0  none         swap    defaults                 zramsize=75%
diff --git a/ramdisk/fstab.zram.none b/ramdisk/fstab.zram.none
new file mode 100644
index 0000000..cbd9d17
--- /dev/null
+++ b/ramdisk/fstab.zram.none
@@ -0,0 +1 @@
+#<src>            <mnt_point>  <type>  <mnt_flags and options>  <fs_mgr_flags>
diff --git a/ramdisk/init.rpi4.rc b/ramdisk/init.rpi4.rc
index 1705025..56dc7ae 100644
--- a/ramdisk/init.rpi4.rc
+++ b/ramdisk/init.rpi4.rc
@@ -3,8 +3,15 @@ import /vendor/etc/init/hw/init.${ro.hardware}.usb.rc
 on init
     symlink /sdcard /storage/sdcard0
 
+    # Memory reserve tuning for RPi 4
+    write /proc/sys/vm/min_free_kbytes 27386
+    write /proc/sys/vm/lowmem_reserve_ratio "0 0 0"
+
 on fs
     mount_all /vendor/etc/fstab.rpi4 --early
 
 on late-fs
-    mount_all /vendor/etc/fstab.rpi4 --late
\ No newline at end of file
+    mount_all /vendor/etc/fstab.rpi4 --late
+
+on property:sys.boot_completed=1
+    swapon_all /vendor/etc/fstab.zram.${persist.vendor.zram.size}
\ No newline at end of file
diff --git a/sepolicy/property.te b/sepolicy/property.te
index db4d500..9d71f9d 100644
--- a/sepolicy/property.te
+++ b/sepolicy/property.te
@@ -4,3 +4,4 @@ vendor_internal_prop(vendor_hdmi_config_prop)
 vendor_internal_prop(vendor_hwc_config_prop)
 vendor_internal_prop(vendor_v4l2_config_prop)
 vendor_internal_prop(vendor_pawlet_ota_prop)
+vendor_internal_prop(vendor_zram_config_prop)
diff --git a/sepolicy/property_contexts b/sepolicy/property_contexts
index c720c54..1b686f7 100644
--- a/sepolicy/property_contexts
+++ b/sepolicy/property_contexts
@@ -22,3 +22,6 @@ ro.vendor.pawlet.ota.  u:object_r:vendor_pawlet_ota_prop:s0
 # V4L2
 persist.vendor.v4l2_codec2.rank.decoder  u:object_r:vendor_v4l2_config_prop:s0
 persist.vendor.v4l2_codec2.rank.encoder  u:object_r:vendor_v4l2_config_prop:s0
+
+# ZRAM
+persist.vendor.zram.size  u:object_r:vendor_zram_config_prop:s0
diff --git a/sepolicy/vendor_init.te b/sepolicy/vendor_init.te
index ef9cb16..2088160 100644
--- a/sepolicy/vendor_init.te
+++ b/sepolicy/vendor_init.te
@@ -4,3 +4,4 @@ set_prop(vendor_init, vendor_hdmi_config_prop)
 set_prop(vendor_init, vendor_hwc_config_prop)
 set_prop(vendor_init, vendor_v4l2_config_prop)
 set_prop(vendor_init, vendor_pawlet_ota_prop)
+set_prop(vendor_init, vendor_zram_config_prop)