Health Monitor Module Version 2.0 (Sun Management Center 3.6.1 User's Guide)

Sun Management Center 3.6.1 User's Guide

Health Monitor Module Version 2.0

The Health Monitor module monitors the health of your host. When alarm conditions occur, this module offers suggestions, if necessary, on how to improve the performance of the system.

For example, this module monitors the swap space that is available, reserved, allocated, and used. Sample alarm messages, from lowest to highest severity, include:

No Worries: sufficient swap space available
There is lots of unused swap space
Not much swap left: perhaps add some more
Swap space shortage: add some more now
Dangerous swap space shortage: add more immediately

This section describes properties of the following Health Monitor module managed objects:

Swap Table
Kernel Contention Table
NFS Table
CPU Table
Disk Table
RAM Table
Kernel Memory Table
Directory Cache Table

The Health Monitor module tracks the system properties for the above as described in the following table.

Table C–128 Health Monitor Properties


Property	Description
Swap	Details the swap space
Kernel Contention	Monitors the kernel contention (mutex) properties
NFS	Provides NFS client information
CPU	Provides information on the power of the CPU
Disk	Presents the disc I/O information
RAM	Random access memory (RAM) information
Kernel Memory	Information on kernel memory
Directory Cache	Cache of the directory

Swap Table

The following table provides a brief description of the properties for Swap.

Table C–129 Swap Properties


Property	Description
Swap Available KB	Swap space value available
Swap Reserved KB	Swap space value reserved
Swap Allocated KB	Swap space value allocated
Swap Used KB	Swap space value used
Swap Rule	Rule for swap

Kernel Contention Table

The following table provides a brief description of the properties for Kernel Contention (mutex).

Table C–130 Kernel Contention Properties


Property	Description
Spins On Mutexes	Spins on mutexes (lock not acquired on first try) - Sum for all CPUs
Number Of CPUs	Number of CPUs
Spins On Mutexes Rule	Spins on mutexes (lock not acquired on first try) - Sum for all CPUs

NFS Table

The following table provides a brief description of the properties for NFS client information.

Table C–131 NFS Client Information Properties


Property	Description
Calls	Total number of RPC calls received
Badcalls	Total number of calls rejected by the RPC layer
Retrans	Call retransmitted due to a timeout
Badxids	Reply from server not corresponding to any outside call
Timeouts	Call timed-out while waiting for a reply from server
Newcreds	Number of times authentication information was refreshed
Badverfs	Calls failed due to a bad verifier in response
Timers	Number of times that calculated timeouts exceed the minimum specified timeout value for a call.
Nomem	Failure to allocate memory
Can't Send	Failure to send NFS/RPC rule
NFS/RPC Rule	Value of the NFS/RPC rule

CPU Table

The following table provides a brief description of the properties for the central processing unit (CPU).

Table C–132 CPU Properties


Property	Description
Processes In Run Queue	Number of processes in run queue
Processes Waiting	Number of processes blocked for resources
Processes Swapped	Number of processes that can be run but swapped
CPU Power Rule	CPU power rule

Disk Table

The following table provides a brief description of the properties for disk.

Table C–133 Disk Properties


Property	Description
Disk Name	Name of the disk
Disk Alias	Name of the disk, such as `c0t0d0`
Percent Disk Wait	Average number of transactions waiting for service
Percent Disk Busy	Percent of time disk is busy
Service Time (ms)	Average service time in milliseconds
Disk Rule	Disk rule

RAM Table

The following table provides a brief description of the properties for random access memory (RAM).

Table C–134 RAM Properties


Property	Description
Handspread	Value of hand spread (one of kernel parameters) pages
Scan rate	Page scan rate
Real Memory rule	Real memory rule

Kernel Memory Table

The following table provides a brief description of the properties for Kernel Memory.

Table C–135 Kernel Memory Properties


Property	Description
Total Kernel Allocation Fails	Value of kernel allocation failure
Physical Memory Free	Value of free physical memory
Kernel Memory Rule	Value of kernel memory rule

Directory Cache Table

The following table provides a brief description of the properties for Directory Cache.

Table C–136 Name Cache Statistics Properties


Property	Description
Cache Hits	Number of times a previously accessed page is found
Cache Misses	Number of times a previously accessed page is missed
DNLC Rule	Directory name lookup cache rule