Operating System KBs

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Revision as of 02:45, 12 July 2006; view current revision
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Overview

The primary aim of the operating system knowledge bases in Sentinel3G is to provide a base level of operations monitoring that is consistent across various UNIX/Linux platforms. Due to differences between the various operating systems we monitor, complete consistency is not always achievable. This document describes the general content of the OS knowledge bases, and the discrepancies between them on different platforms.

Standard Knowledge Base

The standard knowledge base is OS independent, and so is packaged with Sentinel3G on all Operating Systems. It can be upgraded, but not uninstalled.

Sentry	AIX	HPUX	Linux	SCO	Solaris	Tru64	Windows³
Connectivity¹	√	√	√	√	√	√	√
Event_Manager¹	√	√	√	√	√	√	√
Host_Monitor	√	√	√	√	√	√	√
Scheduler²	√	√	√	√	√	√	√

¹ Connectivity and Event_Manager sentries are only started on the Event Host.
² Scheduler sentry is not started by default. Please read the online documentation for details on how to use the Scheduler sentry.
³ Agent only. Full Event Manager and Host Monitory available May 2003.

OS Knowledge Base Versions

OS	Version	Availability Date	Min Sentinel Version
AIX risc	2.1	17th Mar, 2004	4.4
HPUX parisc	2.1	11th May, 2004	4.4
HPUX intel	2.2	6th Jul, 2006	4.4
Linux intel	2.1	12th Mar, 2004	4.4
SCO Open Server	1.1	25th Oct, 2002	4.2
Solaris intel	2.1	14th Jan, 2003	4.4
Solaris sparc	2.2	14th Feb, 2006	4.4
Tru64	1.2	13th Aug, 2002	4.4
Windows NT/2000/XP	1.0	22nd Jan, 2003	4.4

OS Knowledge Bases

CPU Class

Sentry	AIX	HPUX	Linux	SCO	Solaris	Tru64	Windows
CPU_States¹	√	√	√	√	√	√	√
Processors	√	√	√		√
Context_Switches	√	√	√	√		√	√
Interrupts	√	√	√			√	√
Run_Queue	√	√	√	√	√	√	√
System_Calls	√	√		√		√	√

NOTE: Certain operating systems do not provide all the CPU statistics by default, and collecting them may require kernel patches or third party collection tools. Solaris requires packages SUNWaccr and SUNWaccu. Tru64 requires …

¹ All operating systems monitor % System, % User and % Idle CPU time, some OSes provide more information:

OS	More CPU_States Information	Description
AIX, Solaris, Tru64	% Wait IO	The amount of time spent waiting for blocked I/0 to complete.
Linux	% Nice CPU	The percentage of time that the system is in the user state running processes at low (nice) scheduling priority.
HPUX

Disk Class

Sentry	AIX	HPUX	Linux	SCO	Solaris	Tru64	Windows
Disk	√	√		√	√	√	√

Error Log Class

Sentry	AIX	HPUX	Linux	SCO	Solaris	Tru64	Windows
Error_Log	√

Filesystem Class

Sentry	AIX	HPUX	Linux	SCO	Solaris	Tru64	Windows
Filesystem	√¹	√	√	√	√	√	√

¹ AIX provides two sentries for free space monitoring, one sentry specifically for /usr (with less sensitive thresholds) and another for the other filesystems.

Memory Class

Sentry	AIX	HPUX	Linux	SCO	Solaris	Tru64	Windows
Paging_Rate	√	√	√	√	√	√
Physical_Memory			√		√		√
Swap_Rate		√	√		√
Swap_Space	√	√	√	√	√	√	√

NOTE: Certain operating systems do not provide all the memory statistics, as it may not be relevant (eg Swap_Rate on Tru64 and AIX).

Network Class

Sentry	AIX	HPUX	Linux	SCO	Solaris	Tru64	Windows
Collisions	√		√	√	√	√
Drops	√		√				√
Errors	√			√	√	√	√
Packets_Received	√	√	√¹	√	√¹	√	√
Packets_Sent	√¹	√	√	√	√¹	√	√

¹ Packets sent and received are known only as sent and received on Solaris and Linux.

Printers Class

Sentry	AIX	HPUX	Linux	SCO	Solaris	Tru64	Windows
Printers			√		√¹		√

¹ The Solaris Printer class is "off" by default. This is due to an intermittent issue with the printer agent. The symptoms are excessive cpu usage by the Eventmanager. This only occurs on a very small number of systems.

Processes Class

Sentry	AIX	HPUX	Linux	SCO	Solaris	Tru64	Windows
CPU_Usage	√	√	√	√	√	√	√
MEM_Usage	√	√	√	√	√	√
Processes¹	√	√	√	√	√	√

NOTE: All OS Knowledge Bases support the Process Management Console, provided as an action against Processes sentry class.

¹ On certain OSes the Processes sentry is turned off by default. Certain instances are provided as examples (nmdb, smdb) only, but should be changed to reflect the system on which the KB is installed. Note also that system services (daemons) are normally monitored via the Services sentry, so check in the Services folder before adding processes to be monitored.

Security Class

Sentry	AIX	HPUX	Linux	SCO	Solaris	Tru64	Windows
Bad_SU		√¹

¹ On Linux, the Bad_SU sentry is not started by default, as it needs specific configuration to work correctly. Please read the sentry notes for more information on how to configure this sentry.

Services Class

Sentry	AIX	HPUX	Linux	SCO	Solaris	Tru64	Windows
Services	√¹	√	√²	√	√	√	√

¹ AIX provides a complete service management interface using lssrc, startsrc and stopsrc. This interface has been implemented via actions on the Services sentry on AIX.

² Linux provides a complete service management interface using chkconfig and the startup/shutdown scripts in /etc/init.d (/etc/rc.d/init.d on older systems). This interface has been implemented via actions on the Services sentry on Linux.

System Class

Sentry	AIX	HPUX	Linux	SCO	Solaris	Tru64	Windows
CPU_Information	√	√	√¹	√	√	√	√
Memory_Information	√	√	√	√	√	√	√
Operating_System	√	√	√	√	√	√	√
System_Uptime	√	√	√	√	√	√	√

¹ The Linux OS on the i386 platform provides additional CPU information including the approximate speed and vendor of the processors.

Sentry Details

Overview

Sentry	Class	Agent	Poll Time	States	Logging
CPU_States	CPU	Performance	60s	AIX only	√
Context_Switches	CPU	Performance	60s
Interrupts	CPU	Performance	60s
Run_Queue	CPU	Performance	60s	√	√
System_Calls	CPU	Performance	60s	√
Processors	CPU/Processors	MultiProcessor	60s
Disk	Disk	Disk	120s	√	√
Error_Log	Error_Log	ErrorLog	120s	√
Filesystem	Filesystem	Filesystem	300s	√	√
Paging_Rate	Memory	Performance	60s	AIX only
Physical_Memory	Memory	Performance	60s	Solaris only
Swap_Rate	Memory	Performance	60s
Swap_Space (Linux)	Memory	Performance	60s	√	√
Swap_Space (non-Linux)	Memory	Swap	180s	√	√
Network	Network	Network	120s	√	√
Printers	Printers	Printer	180s	Solaris only
CPU_Usage	Processes	ProcessInfo	75s	√	√
MEM_Usage	Processes	ProcessInfo	75s	√	√
Processes	Processes	ProcessInfo	75s	√
Bad_SU	Security	BadSU	n/a²	√
Services	Services	Service	120s	√
CPU_Information	System	Information	n/a³

¹ Packets sent and received are known only as sent and received on Solaris and Linux.
² The BadSU agent is a LogFile agent, and so does not have a poll time. Any new data is interpreted whenever the logfile being monitored changes.
³ The Information agent is essentially run only once.

Sentry State Details

CPU States Sentry

Availability: AIX¹, HPUX, Linux, SCO, Solaris, Tru64, Windows

Constants

Constant	Descrition	Value
CPU_BUSY	User + System percentage indicating the CPU is busy	90
CPU_OVERLOADED	User + System percentage indicating the CPU is overloaded	95

States (AIX only)

State	Severity	Condition	Escalation
OVERLOAD_CPU	warning	$cpu_user + $cpu_system > $CPU_OVERLOADED	severe after 120s
BUSY_CPU	normal	$cpu_user + $cpu_system > $CPU_BUSY	warning after 120s
NOT_BUSY	normal

¹ The CPU States sentry only has states defined for AIX.

Run Queue Sentry

Availability: AIX, HPUX, Linux, SCO, Solaris, Tru64, Windows

Constants

Constant	Descrition	Value
RUNQ_IDLE	Empty run queue	0
RUNQ_WARN	Warning run queue length	2
RUNQ_PROB	Long run queue length	5

States (HPUX, Linux, SCO, Solaris, Tru64, Windows)

State	Severity	Condition
OVERLOAD	alarm	$run_queue > $RUNQ_PROB
BUSY	warning	$run_queue > $RUNQ_WARN
NORMAL	normal

States (AIX only)

State	Severity	Condition	Escalation
OVERLOAD	warning	$run_queue > $RUNQ_PROB	severe after 120s
BUSY	normal	$run_queue > $RUNQ_WARN	warning after 120s
NORMAL	normal

System Calls Sentry

Availability: AIX, HPUX, SCO, Tru64, Windows

Constants

Constant	Descrition	Value
CPU_SYSCALLS	Too many system calls per second	10000

States

State	Severity	Condition	Escalation
BUSY	normal	$sys_per_sec > $CPU_SYSCALLS	alarm after 120s
NORMAL	normal

Disk Sentry

Availability: AIX¹, HPUX, SCO, Solaris, Tru64, Windows

Constants (Solaris, Tru64)

Constant	Descrition	Value
DSK_BUSY_WARN	% busy indicating disk is busy	5
DSK_BUSY_PROB	% busy indicating disk is very busy	20
DSK_SVCT_WARN	Indicates a long service time (ms)	30
DSK_SVCT_PROB	Indicates a very long service time (ms)	50

States (Solaris, Tru64)

State	Severity	Condition
DSK_VERYBUSY	alarm	$percent_busy >= $DSK_BUSY_PROB && $service_time >= $DSK_SVCT_PROB
DSK_BUSY	warning	$percent_busy >= $DSK_BUSY_WARN && $service_time >= $DSK_SVCT_WARN
DSK_NORMAL	normal

Constants (AIX, Windows)

Constant	Descrition	Value
DSK_BUSY_WARN	% busy indicating disk is busy	40
DSK_BUSY_PROB	% busy indicating disk is very busy	60

States (AIX only)

State	Severity	Condition	Escalation
DSK_VERYBUSY	warning	$percent_busy > $DSK_BUSY_PROB	severe after 120s
DSK_BUSY	normal	$percent_busy > $DSK_BUSY_WARN	warning after 120s
DSK_NORMAL	normal

¹ Unfortunately the service time statistic is not available on AIX. The service time is a better indicator of disk IO performance. Even if a disk is 100% busy, there is no real problem unless the service time for the disk is also getting high.

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Operating System KBs

From Documentation

Contents

Overview

Standard Knowledge Base

OS Knowledge Base Versions

OS Knowledge Bases

CPU Class

Disk Class

Error Log Class

Filesystem Class

Memory Class

Network Class

Printers Class

Processes Class

Security Class

Services Class

System Class

Sentry Details

Overview

Sentry State Details

CPU States Sentry

Run Queue Sentry

System Calls Sentry

Disk Sentry