Oracle and AMM /dev/shm

###############################################
#
# What is /dev/shm
# http://blog.oracle48.nl/oracle-11g-amm-memory_target-memory_max_target-and-dev_shm/
#
###############################################
for k in y
do
MV=0
echo -e "\n"
# for x in `ps -ef | grep smon | grep -Ev 'ASM|grep|bin' | cut -f3 -d "_"`
for x in `ps -ef | grep smon | grep -Ev 'grep|bin' | cut -f3 -d "_"`
do
MC=0
for i in `ls -al /dev/shm | grep ${x} | awk '{print $5}'`
do
MC=`expr ${MC} + ${i}`
done
echo "Checking memory for: ${x} - ${MC}"
A=`echo "scale=2;"\`echo ${MC}\`/1048576/1024 | bc -l`
echo -e "\t${A}G"
MV=`expr ${MC} + ${MV}`
done
echo "Total usage: "
B=`echo "scale=2;"\`echo ${MV}\`/1048576/1024 | bc -l`
echo -e "\t${B}G"
# echo "Total usage: ${MV}"
df -h /dev/shm
echo -e "\n"
done