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Full Discussion: Bash script affect load average
Top Forums Shell Programming and Scripting Bash script affect load average Post 302817597 by capilla on Thursday 6th of June 2013 05:30:24 AM
Old 06-06-2013
Bash script affect load average
Hello
I have created next scritpt to do the next: chekp if host is alive. When the host down, launch telnet other equip to do checks.
When execute the script the load average of the machines increase. For example:
Before launch script
Code:
top - 11:14:56 up 14 days, 18:06,  3 users,  load average: 2.66, 2.52, 2.26
Tasks: 251 total,   2 running, 234 sleeping,   0 stopped,  15 zombie
Cpu(s):  7.0%us, 10.3%sy, 25.7%ni, 56.9%id,  0.0%wa,  0.0%hi,  0.1%si,  0.0%st
Mem:   3097180k total,  2782136k used,   315044k free,   182920k buffers
Swap:  3903480k total,      624k used,  3902856k free,  2064220k cached

After 10 min launch the script
Code:
top - 11:24:09 up 14 days, 18:15,  3 users,  load average: 3.88, 3.48, 2.85
Tasks: 250 total,   2 running, 230 sleeping,   0 stopped,  18 zombie
Cpu(s): 20.5%us, 25.3%sy,  0.2%ni, 53.8%id,  0.0%wa,  0.1%hi,  0.2%si,  0.0%st
Mem:   3097180k total,  2797204k used,   299976k free,   183912k buffers
Swap:  3903480k total,      624k used,  3902856k free,  2067728k cached

After 3 hours the load average can be 17 or more.
What is the problem with the script? It's the | ? the sleps??
The script:
Code:
#!/bin/bash
HOSTS="198.19.1.174"
COUNT=1
COUNT2=1
COUNT3=0
USER="****"
PASS="****"
#touch result$COUNT3.txt
function bucle(){
while [  $COUNT2 -lt 10 ];
do
  count=$(ping -c $COUNT $HOSTS | grep 'received' | awk -F',' '{ print $2 }' | awk '{ print $1 }')
  if [ $count -eq 0 ]; then
    # 100% failed
    echo "Host : $myHost is down (ping failed) at $(date)"
( echo open 198.19.1.174
sleep 2;
echo ${USER}
sleep 2;
echo ${PASS}
sleep 2;
echo "sh clock"
sleep 2;
echo "ping vrf OOB 198.19.1.175"
sleep 2;
echo "ping vrf OOB 198.19.1.176"
sleep 2;
echo "sh ip arp vrf OOB vlan 1307 | i 198.19.1.175"
sleep 2;
echo "sh ip arp vrf OOB vlan 1307 | i 198.19.1.176"
sleep 2;
echo "sh mac-address-table interface gigabitEthernet 7/29"
sleep 2;
echo "sh mac-address-table interface gigabitEthernet 7/33"
sleep 2;
echo "sh clock"
sleep 2;) |telnet
( echo open 198.18.1.174
sleep 3;
echo ${USER}
sleep 3;
echo ${PASS}
echo "ping vrf OOB 198.19.1.175 source vlan 1207"
sleep 10;
echo "ping vrf OOB 198.19.1.176 source vlan 1207"
sleep 10;) |telnet
COUNT3=COUNT3+1
#echo $COUNT3
fi
done
}

bucle

Thanks!!!!!
 

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LEARN ABOUT OSF1

ruptime

ruptime(1)						      General Commands Manual							ruptime(1)

NAME

       ruptime - Displays the status of each host on a network

SYNOPSIS

       ruptime [-ar] [-l  | -t	| -u]

       ruptime [-ar] [-l  | -t	| -u] [machinename]

       The ruptime command displays the status of each host on a local network that is running the rwhod daemon.

       If machinename is specified, only the status of that machine is displayed.

OPTIONS

       Includes all users.  Without this option, users whose sessions are idle an hour or more are not included.  Sorts the list by the load aver-
       age over 5-, 10-, and 15-minute intervals prior to a server's transmission.  The load averages are multiplied by 10 to represent the  value
       in decimal format.  Reverses the sort order.  Sorts the list by the length of uptime.  Sorts the list by the number of users.

DESCRIPTION

       The  status lines are sorted by hostname unless the -l, -t, or -u option is indicated. The status information is provided in packets broad-
       cast once every 3 minutes by each network host running rwhod. Any activity (such as the power to a host being turned on or off) that  takes
       place  between  broadcasts  is not reflected until the next broadcast. Hosts for which no status information is received for 11 minutes are
       reported as down.

EXAMPLES

       To get a status report on the hosts on the local network, enter: $ ruptime

	      Information  similar  to	the  following	 is   displayed:   host1     up   5:15, 	 4   users,    load   0.09,   0.04,   0.04
	      host2	up   7:45,	    3  users,	load  0.08,  0.07,  0.04  host3     up	 2:28,		0  users,   load  0.01, 0.02, 0.03
	      host4	up   3+01:44,  1 user,	 load 0.01, 0.02, 0.03 host7	 up   7:43,	     1 user,   load 0.06, 0.12, 0.11

	      (Output may be formatted differently on your system.)  To get a status report sorted by load average, enter: $ ruptime -l

	      Information  similar  to	the  following	 is   displayed:   host2     up   7:45, 	 3   users,    load   0.08,   0.07,   0.04
	      host1	up   5:18,	    4  users,	load  0.07,  0.07,  0.04  host7     up	 7:43,		1  user,    load  0.06, 0.12, 0.11
	      host3	up   2:28,	    0 users,  load 0.01, 0.02, 0.03 host4     up   3+01:44,  1 user,   load 0.01, 0.02, 0.03

	      (Output may be formatted differently on your system.)

FILES

       Indicates data files received from remote rwhod daemons.

SEE ALSO

       Commands:  rwho(1), rwhod(8)

																	ruptime(1)
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