neerajnagi/control group

## control group
###install
```
yum install -y libcgroup
chkconfig cgconfig on
/etc/init.d/cgconfig start
cgcreate -g memory:/bigcouch
echo $(( 2500 * 1024 * 1024 )) > /cgroup/memory/bigcouch/memory.limit_in_bytes
```

###sample upstart using cgconfig
```
start on runlevel [23]
stop on shutdown
# Respawn in case of a crash, with default parameters
respawn

# set working directory

# required for erlang
 env HOME="/usr/lib64/erlang/bin"
 export HOME

env DIRECTORY=/opt/bigcouch/bin
env LOG_FILE=/var/log/bigcouch.log
script
   # modify PATH to hit local couchdb's working directory first
  cd $DIRECTORY
  touch $LOG_FILE
  # recommended approach in case of su/sudo usage so that service does not fork
  exec /bin/bash -c "cgexec -g memory:bigcouch ./bigcouch   >> $LOG_FILE 2>&1"

end script

post-start script
end script

```
	###install
	```
	yum install -y libcgroup
	chkconfig cgconfig on
	/etc/init.d/cgconfig start
	cgcreate -g memory:/bigcouch
	echo $(( 2500 * 1024 * 1024 )) > /cgroup/memory/bigcouch/memory.limit_in_bytes
	```

	###sample upstart using cgconfig
	```
	start on runlevel [23]
	stop on shutdown
	# Respawn in case of a crash, with default parameters
	respawn

	# set working directory

	# required for erlang
	env HOME="/usr/lib64/erlang/bin"
	export HOME

	env DIRECTORY=/opt/bigcouch/bin
	env LOG_FILE=/var/log/bigcouch.log
	script
	# modify PATH to hit local couchdb's working directory first
	cd $DIRECTORY
	touch $LOG_FILE
	# recommended approach in case of su/sudo usage so that service does not fork
	exec /bin/bash -c "cgexec -g memory:bigcouch ./bigcouch >> $LOG_FILE 2>&1"

	end script

	post-start script
	end script

	```