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Operating Systems Linux Red Hat HELP - Resource/Performance Monitoring Script - Red Hat Enterprise Linux Server Post 302506140 by newbie_01 on Friday 18th of March 2011 04:10:27 PM
Old 03-18-2011
HELP - Resource/Performance Monitoring Script - Red Hat Enterprise Linux Server

Hi all,

-------------------------
Linux OS Version/Release:
-------------------------

Red Hat Enterprise Linux Server release 5.5 (Tikanga)
Linux <hostname> 2.6.18-194.8.1.el5 #1 SMP Wed Jun 23 10:52:51 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux

I have a server that hosts 30+ Oracle databases. Each database has its own set of scripts that shuts down the database and start the database. Things has been working "smoothly" in the last couple of months until this week.

My log in most cases shows errors like the ones below:

cannot fork [Resource temporarily unavailable]
Connection reset by peer

I am 100% sure that the scripts are not at fault since it has been working with no errors for months. I want to monitor the server for what resource or configurations I have to tweak to get around this problem if possible, am I exceeding my ulimit settings running out of process, out of memory/swap space etc?

I wish I could stay up 24x7 to monitor to monitor the server but I can't. Can anyone please advise if there is any monitoring script available somewhere that I can put in cron to temporarily monitor the server for resource issues, for example memory used/left, swap space used/left, ulimit-num-process used/left, nofiles used/left etc.

Any help/advise/suggestion will be much appreciated. Thanks in advance.
 

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MONITOR(8)						      System Manager's Manual							MONITOR(8)

NAME
monitor - Directory Server script for monitoring database performance SYNOPSIS
monitor [ -Z serverID ] [ -D rootdn ] [ -w password ] [ -b basedn ] [-P protocol] [-h] DESCRIPTION
Retrieves performance monitoring information. To run this script, the server must be running. OPTIONS
A summary of options is included below: -Z Server Identifier The server ID of the Directory Server instance. If there is only one instance on the system, this option can be skipped. -D Root DN The Directory Manager DN, or root DN. If not specified, the script will search the server instance configuration for the value. -w password The rootdn password. -b basedn The DN of a backend from cn=config. -P Protocol The connection protocol to connect to the Directory Server. Protocols are STARTTLS, LDAPS, LDAPI, and LDAP. If this option is skipped, the most secure protocol that is available is used. For LDAPI, AUTOBIND is also available for the root user. -h Display the usage. EXAMPLE
monitor -P STARTTLS Note: security must be enabled to use protocol STARTTLS. If STARTTLS is not available it will default to next strongest/available protocol automatically. monitor -Z instance2 -D 'cn=directory manager' -w password -b 'cn=monitor,cn=userRoot,cn=ldbm database,cn=plugins,cn=config' Note: You only need to bind as the root DN if you want to look at a backend monitor. DIAGNOSTICS
Exit status is zero if no errors occur. Errors result in a non-zero exit status and a diagnostic message being written to standard error. AUTHOR
monitor was written by the 389 Project. REPORTING BUGS
Report bugs to http://bugzilla.redhat.com. COPYRIGHT
Copyright (C) 2013 Red Hat, Inc. Mar 5, 2013 MONITOR(8)
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