check and restart process if server memory utilization is too high. this is designed to be a quick fix until the larger problem is diagnosed

memory_allocation.sh

#!/bin/sh
percent_allowed=85

memory_too_high(){
    MAXMEM=$(free -m | grep -oP '\d+' | head -n 1) #total available memory
    USEDMEM=$(free -m | awk 'NR==2{printf "%s", $3,$2,$3*100/$2 }') # memory used
    
    PERCENTAGE=$(echo "scale=8;  ($USEDMEM  / $MAXMEM) * 100" | bc) # get percentage
    
    P_INT=${PERCENTAGE%.*} # convert from float to int
    
    echo memory allocation: $P_INT'%'
    
    result=$(( P_INT < percent_allowed)) # 1 if memory is too high 
    return $result
}

if memory_too_high ;
then
        echo "memory allocation is too high... killing all node processes"
        killall node;
        sleep 1s
        /usr/local/bin/pm2 status
        sleep 1s
        /usr/local/bin/pm2 start path/to/script
else
        echo "no issues"
fi
~