Workstation tuning params

zramstart

@@ -3,20 +3,32 @@
 num_cpus=$(grep -c processor /proc/cpuinfo)
 [ "$num_cpus" != 0 ] || num_cpus=1
 
-last_cpu=$((num_cpus - 1))
-FACTOR=33
+threads=$((num_cpus * 4))
+last_thread=$((threads - 1))
+FACTOR=200
+
 [ -f /etc/sysconfig/zram ] && source /etc/sysconfig/zram || true
 factor=$FACTOR # percentage
 
 memtotal=$(grep MemTotal /proc/meminfo | awk ' { print $2 } ')
-mem_by_cpu=$(($memtotal/$num_cpus*$factor/100*1024))
+mem_by_cpu=$(($memtotal/$threads*$factor/100*1024))
+modprobe -q zram num_devices=$threads
+for i in $(seq 0 $last_thread); do
+  #enable lz4 if that supported
+  grep -q lz4 /sys/block/zram$i/comp_algorithm && echo lz4 > /sys/block/zram$i/comp_algorithm
+  echo $mem_by_cpu > /sys/block/zram$i/disksize
+  mkswap /dev/zram$i
+  swapon -p 100 /dev/zram$i
+done
 
-modprobe -q zram num_devices=$num_cpus
+# vm.vfs_cache_pressure=50
+# vm.dirty_ratio=30
+# vm.dirty_background_ratio=20
 
-for i in $(seq 0 $last_cpu); do
-	#enable lz4 if that supported
-	grep -q lz4 /sys/block/zram$i/comp_algorithm && echo lz4 > /sys/block/zram$i/comp_algorithm
-	echo $mem_by_cpu > /sys/block/zram$i/disksize
-	mkswap /dev/zram$i
-	swapon -p 100 /dev/zram$i
-done
+# ON SSD
+# vm.swappiness=5
+# ON HDD
+# vm.swappiness=99
+
+# if you having SSD, you may try class 1 (realtime)
+# ionice -c 2 -p `pgrep kswapd0`

zramstat

@@ -2,12 +2,31 @@
 
 ls /sys/block/zram* > /dev/null 2>&1 || exit 0
 
+sum_compr=0
+sum_orig=0
+
+while [ 1 ]; do
+
 for i in /sys/block/zram*; do
-	compr=$(< $i/compr_data_size)
-	orig=$(< $i/orig_data_size)
-	ratio=0
-	if [ $compr -gt 0 ]; then
-		ratio=$(echo "scale=2; $orig*100/$compr" | bc -q)
-	fi
-	echo -e "/dev/${i/*\/}:\t$ratio% ($orig -> $compr)"
+  compr=$(< $i/compr_data_size)
+  orig=$(< $i/orig_data_size)
+  sum_compr=$((sum_compr+compr))
+  sum_orig=$((sum_orig+orig))
+  ratio=0
+  if [ $compr -gt 0 ]; then
+    ratio=$(echo "scale=2; $orig*100/$compr" | bc -q)
+  fi
+# echo -e "/dev/${i/*\/}:\t$ratio% ($orig -> $compr)"
+done
+
+ratio=0
+if [ $sum_compr -gt 0 ]; then
+  ratio=$(echo "scale=2; $sum_orig*100/$sum_compr" | bc -q)
+fi
+sum_orig=$((sum_orig/1024/1024))
+sum_compr=$((sum_compr/1024/1024))
+diff=$((sum_orig-sum_compr))
+
+echo -ne "\t GAINED $diff MB by using $sum_compr MB\r    "
+sleep 1
 done