Memory Usage Monitor on Linux/SunOS Servers Post: 302480608

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Top Forums Shell Programming and Scripting Memory Usage Monitor on Linux/SunOS Servers Post 302480608 by SkySmart on Wednesday 15th of December 2010 10:40:29 AM

12-15-2010

Registered User

Memory Usage Monitor on Linux/SunOS Servers

ok, so i'm trying to write a shell script (not perl) that monitors memory usage on a server. but i'm confused as to what fields exactly determines that yes, memory is low on a particular server.

it sounds simple enough, but it really isn't. what do I look for in the field below?

Code:

[hostname:527] 
[hostname:527] snmpwalk -v2c -c bla@$AF s54.jabla.net UCD-SNMP-MIB::memory    
UCD-SNMP-MIB::memIndex.0 = INTEGER: 0
UCD-SNMP-MIB::memErrorName.0 = STRING: swap
UCD-SNMP-MIB::memTotalSwap.0 = INTEGER: 2040212 kB
UCD-SNMP-MIB::memAvailSwap.0 = INTEGER: 2036260 kB
UCD-SNMP-MIB::memTotalReal.0 = INTEGER: 8314956 kB
UCD-SNMP-MIB::memAvailReal.0 = INTEGER: 302620 kB
UCD-SNMP-MIB::memTotalFree.0 = INTEGER: 2338880 kB
UCD-SNMP-MIB::memMinimumSwap.0 = INTEGER: 16000 kB
UCD-SNMP-MIB::memShared.0 = INTEGER: 0 kB
UCD-SNMP-MIB::memBuffer.0 = INTEGER: 203980 kB
UCD-SNMP-MIB::memCached.0 = INTEGER: 4031680 kB
UCD-SNMP-MIB::memSwapError.0 = INTEGER: noError(0)
UCD-SNMP-MIB::memSwapErrorMsg.0 = STRING: 
[hostname:528] 
[hostname:528]

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snmpdf

SNMPDF(1)							     Net-SNMP								 SNMPDF(1)

NAME

       snmpdf - display disk space usage on a network entity via SNMP

SYNOPSIS

       snmpdf [COMMON OPTIONS] [-Cu] AGENT

DESCRIPTION

       snmpdf  is  simply  a  networked  verison of the typical df command.  It checks the disk space on the remote machine by examining the HOST-
       RESOURCES-MIB's hrStorageTable or the UCD-SNMP-MIB's dskTable.  By default, the hrStorageTable is preferred as it typically  contains  more
       information.  However, the -Cu argument can be passed to snmpdf to force the usage of the dskTable.

       AGENT  identifies  a  target SNMP agent, which is instrumented to monitor the gievn objects.  At its simplest, the AGENT specification will
       consist of a hostname or an IPv4 address.  In this situation, the command will attempt communication with the agent, using UDP/IPv4 to port
       161 of the given target host. See the snmpcmd(1) manual page for a full list of the possible formats for AGENT.

       See the snmpd.conf(5) manual page on setting up the dskTable using the disk directive in the snmpd.conf file.

OPTIONS

       COMMON OPTIONS
	       Please see snmpcmd(1) for a list of possible values for COMMON OPTIONS as well as their descriptions.

       -Cu     Forces  the command to use dskTable in mib UCD-SNMP-MIB instead of the default to determine the storage information. Generally, the
	       default use of hrStorageTable in mib HOST-RESOURCES-MIB is preferred because it typically contains more information.

EXAMPLES

       % snmpdf -v 2c -c public localhost

       Description	 size (kB)	   Used    Available Used%
       /		   7524587	2186910      5337677   29%
       /proc			 0	      0 	   0	0%
       /etc/mnttab		 0	      0 	   0	0%
       /var/run 	   1223088	     32      1223056	0%
       /tmp		   1289904	  66848      1223056	5%
       /cache		    124330	   2416       121914	1%
       /vol			 0	      0 	   0	0%
       Real Memory	    524288	 447456        76832   85%
       Swap Space	   1420296	 195192      1225104   13%

SEE ALSO

       snmpd.conf(5), snmp.conf(5)

4th Berkeley Distribution					    25 Jul 2003 							 SNMPDF(1)