[Nexus 10 Q&A, Help & Troubleshooting] brees75:
Here is a tweak that I use in my ROMs that adjusts the individual caches for the ram/disk partitions. I have adjusted it to work with the nexus 10. Depending on your minfree settings you may need to change the size because they work hand in hand. Right now they are set to 2048k, but values anywhere from 256k to 8192k can make a huge difference depending on your setup. 128k is default. Add it to an init.d file.

echo 2048 > /sys/devices/virtual/bdi/0:18/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/0:19/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/1:0/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/1:1/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/1:2/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/1:3/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/1:4/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/1:5/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/1:6/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/1:7/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/1:8/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/1:9/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/1:10/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/1:11/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/1:12/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/1:13/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/1:14/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/1:15/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:0/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:1/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:2/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:3/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:4/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:5/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:6/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:7/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:8/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:9/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:10/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:11/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:12/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:13/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:14/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:15/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:16/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:17/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:18/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:19/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:20/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:21/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:22/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:23/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:24/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:25/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:26/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:27/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:28/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:29/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:30/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:31/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:32/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:33/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:34/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:35/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:36/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:37/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/7:38/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/179:0/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/179:8/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/179:16/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/253:0/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:0/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:1/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:2/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:3/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:4/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:5/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:6/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:7/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:8/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:9/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:10/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:11/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:12/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:13/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:14/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:15/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:16/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:17/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:18/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:19/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:20/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:21/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:22/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:23/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:24/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:25/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:26/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:27/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:28/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:29/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:30/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:31/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:32/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:33/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:34/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:35/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:36/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:37/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/254:38/read_ahead_kb

echo 2048 > /sys/devices/virtual/bdi/default/read_ahead_kb