#!/bin/sh
#
# bump up the number of file handles
#
# Minimum number of file handles
DEFAULTFH=65536

# Calculate ideal number of file handles
MEM=`cat /proc/meminfo | grep ^MemTotal: | awk '{print $2}'`
NEWFH=$[ $MEM/19 ]

# if ideal is less than default, use the default
if [ $NEWFH -lt $DEFAULTFH ]
then
   NEWFH=$DEFAULTFH
fi

# retrieve the old number of file handles. Set to 1 if no value exists
OLDFH=`grep fs.file-max /etc/sysctl.conf| cut -d"=" -f2| sed s/\ //| tail -n1`
if [ ! "$OLDFH" ]
then
   OLDFH=1
fi

# if number of new file handles is more than the old number of file handles,
# append the new value to /etc/sysctl.conf & load the new values
if [ $NEWFH -gt $OLDFH ]
then
   echo fs.file-max = $NEWFH >> /etc/sysctl.conf
   echo $NEWFH > /proc/sys/fs/file-max
fi