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# setparam() { val=`cat /proc/sys/${1//.//}`; if [ "$1" = "kernel.sem" ] || [ "$2" -gt "$val" ]; then val="$2"; fi; echo "$1 = $val" >> /etc/sysctl.d/oracle.conf; }
echo -n "Memory per DB [GB]: " && read DB_MEM && \
echo -n "DB count: " && read DB_COUNT && \
setparam "kernel.shmall" `echo "$(free -b|grep Mem|awk '{print$2}')/$(getconf PAGE_SIZE)"|bc` && \
setparam "kernel.shmmax" `echo "$DB_COUNT*$DB_MEM*1024*1024*1024*3/2"|bc` && \
setparam "kernel.shmmni" 4096 && \
setparam "kernel.sem" "250 32000 100 128" && \
setparam "fs.file-max" 6815744 && \
setparam "fs.aio-max-nr" 2621441048576 && \
setparam "net.core.rmem_default" 262144 && \
setparam "net.core.wmem_default" 4194304 && \
setparam "net.core.rmem_max" 1048576 && \
setparam "net.core.wmem_max" 1048576 && \
sysctl -p /etc/sysctl.d/oracle.conf
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