HEALTH-MONITOR-SUNMANAGEMENTCENTER-MIB

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Organization: Sun Microsystems Inc.

Last Updated: 2000-09-18

Category: Hardware and Environment

Description: Provides health monitoring objects for Sun Management Center, tracking component status and resource utilization on Sun servers.

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What Is HEALTH-MONITOR-SUNMANAGEMENTCENTER-MIB?

HEALTH-MONITOR-SUNMANAGEMENTCENTER-MIB is a Sun Microsystems (Sun Management Center) MIB that exposes the output of the Health Monitor subsystem, which evaluates overall machine wellbeing using rule-based checks against system resources. It covers categories including virtual memory/swap usage, kernel synchronization contention, CPU inventory, and RPC (remote procedure call) subsystem statistics, giving a broad software/OS-level health picture of a Sun server. This is very much a hardware and software status monitoring MIB: it directly reports available/reserved/allocated/used swap space (memory pressure), hmSpinsOnMutexes (kernel lock contention indicating CPU/software stress), hmTotNumOfCPUs (hardware inventory), and RPC call/error/timeout/retransmission counters that reveal degraded NFS or RPC-based service health. It builds on Sun's own sunsymon enterprise MIB tree and is meant to be used alongside other Sun Management Center MIBs covering disks and network interfaces referenced in its description. It is deployed in Solaris/SPARC or Sun x86 server environments managed by Sun Management Center (SunMC) for proactive hardware and OS health monitoring. Engineers can download the HEALTH-MONITOR-SUNMANAGEMENTCENTER-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in HEALTH-MONITOR-SUNMANAGEMENTCENTER-MIB. Use the built-in SNMP Monitoring Browser to explore available variables, view their current values and descriptions, and select the objects you want to monitor. You can then create SNMP monitors, configure thresholds, and receive alerts when monitored values change.

Supported Devices

Sun/Solaris servers (SPARC and x86) managed by Sun Management Center

Monitoring Examples

An administrator would poll hmAvailableSwapSpace, hmReservedSwapSpace, hmAllocatedSwapSpace, and hmUsedSwapSpace to detect a server approaching swap exhaustion, a classic precursor to application failures on Solaris hosts. Simultaneously watching hmTotRPCCalls, hmTotBadRPCReplies, hmTotRPCCallsTimedOut, and hmTotRPCRetransmissions would reveal NFS/RPC service degradation, such as a flaky NFS server causing client-side timeouts. A spike in hmSpinsOnMutexes alongside hmTotNumOfCPUs helps correlate kernel lock contention with the number of available CPUs when diagnosing a performance slowdown.

What Can Be Monitored

swap space available/used/reserved/allocated
kernel mutex contention
CPU count
RPC call volume and errors
RPC timeouts and retransmissions
authentication refresh count

Imported Objects

From SNMPv2-CONF

OBJECT-GROUP

From SNMPv2-SMI

Integer32
MODULE-IDENTITY
OBJECT-TYPE
Unsigned32
enterprises

From SNMPv2-TC

DisplayString

How to Use in IPNetwork Monitor

Example using hmAvailableSwapSpace OID:

Select a Sun/Solaris server (SPARC/x86) managed by Sun Management Center (Health Monitor) as the target host to create a monitor — the SNMP service should be up and running on it. Click New Monitor, then check SNMP Custom on the Favorites tab, click Next, and confirm the host. On the next page, click Select... to open the built-in SNMP MIB Browser and type hmAvailableSwapSpace into the Find box to locate it in the OID tree, then select it and click OK. The total swap space (in 1024 byte blocks) that is currently available for reservation and allocation. On the monitor's Main parameters page you can set the target's SNMP port (default 161), credentials, polling interval, and other settings — see the SNMP Monitor help for details. On the State conditions and Alerting tabs, configure when the monitor should change state and trigger an alert; since this is an Integer32-type OID, Value bounds is the most useful condition here — trigger an alert if the value drifts significantly from its normal baseline, since an unexpected change often points to a real underlying issue. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
sun	1.3.6.1.4.1.42
prod	1.3.6.1.4.1.42.2
sunsymon	1.3.6.1.4.1.42.2.12
agent	1.3.6.1.4.1.42.2.12.2
modules	1.3.6.1.4.1.42.2.12.2.2
healthMonitor	1.3.6.1.4.1.42.2.12.2.2.11			Health Monitor allows to monitor the overall state of the machine, including the state of the disk, networks, RAM, and so on. This module uses a set of performance rules to determine valid component states.
hmSwap	1.3.6.1.4.1.42.2.12.2.2.11.1
hmSwapSpaceGroup	1.3.6.1.4.1.42.2.12.2.2.11.1.1			Swap space related statistics.
I32 hmAvailableSwapSpaceEx	1.3.6.1.4.1.42.2.12.2.2.11.1.1.1	Integer32	read-only	The total swap space (in 1024 byte blocks) that is currently available for reservation and allocation.
I32 hmReservedSwapSpace	1.3.6.1.4.1.42.2.12.2.2.11.1.1.2	Integer32	read-only	The total amount of swap space (in 1024 byte blocks) that is not currently allocated, but is claimed by memory mappings for possible future use.
I32 hmAllocatedSwapSpace	1.3.6.1.4.1.42.2.12.2.2.11.1.1.3	Integer32	read-only	The total amount of swap space (in 1024 byte blocks) currently allocated for use.
I32 hmUsedSwapSpace	1.3.6.1.4.1.42.2.12.2.2.11.1.1.4	Integer32	read-only	The total amount of swap space (in 1024 byte blocks) that is either allocated or reserved.
hmKernelcontention	1.3.6.1.4.1.42.2.12.2.2.11.2
hmMutexGroup	1.3.6.1.4.1.42.2.12.2.2.11.2.1			Mutex related statistics.
I32 hmSpinsOnMutexes	1.3.6.1.4.1.42.2.12.2.2.11.2.1.1	Integer32	read-only	Sum of spins on mutexes (lock not acquired on first try) for all CPUs.
I32 hmTotNumOfCPUs	1.3.6.1.4.1.42.2.12.2.2.11.2.1.2	Integer32	read-only	Total number of CPUs.
hmNFS	1.3.6.1.4.1.42.2.12.2.2.11.3
hmNFSClientRPCGroup	1.3.6.1.4.1.42.2.12.2.2.11.3.1			Client RPC call-related statistics.
STR hmTotRPCCalls	1.3.6.1.4.1.42.2.12.2.2.11.3.1.1	DisplayString	read-only	Total number of RPC calls received.
I32 hmTotBadRPCCalls	1.3.6.1.4.1.42.2.12.2.2.11.3.1.2	Integer32	read-only	Total number of calls rejected by the RPC layer.
I32 hmTotRPCRetransmissions	1.3.6.1.4.1.42.2.12.2.2.11.3.1.3	Integer32	read-only	Total number of calls retransmitted due to a timeout.
I32 hmTotBadRPCReplies	1.3.6.1.4.1.42.2.12.2.2.11.3.1.4	Integer32	read-only	Number of replies from server that do not correspond to any outside call.
I32 hmTotRPCCallsTimedOut	1.3.6.1.4.1.42.2.12.2.2.11.3.1.5	Integer32	read-only	Number of calls timed out while waiting for a reply from server.
I32 hmTotNumOfAuthRefresh	1.3.6.1.4.1.42.2.12.2.2.11.3.1.6	Integer32	read-only	Number of times authentication information was refreshed.
I32 hmTotFailedCallsBV	1.3.6.1.4.1.42.2.12.2.2.11.3.1.7	Integer32	read-only	Number of calls failed due to a bad verifier in response.
I32 hmTimers	1.3.6.1.4.1.42.2.12.2.2.11.3.1.8	Integer32	read-only	Number of times calculated time-out exceeds minimum specified timeout value for a call.
I32 hmTotMemAllocFails	1.3.6.1.4.1.42.2.12.2.2.11.3.1.9	Integer32	read-only	Number of failures to allocate memory.
I32 hmTotSendFails	1.3.6.1.4.1.42.2.12.2.2.11.3.1.10	Integer32	read-only	Number of failures where client is not able to send the packets for any reason.
hmCPU	1.3.6.1.4.1.42.2.12.2.2.11.4
hmCPUProcInStatesGroup	1.3.6.1.4.1.42.2.12.2.2.11.4.1			Statistics related to the number of processes in different states.
I32 hmTotProcInRunQueue	1.3.6.1.4.1.42.2.12.2.2.11.4.1.1	Integer32	read-only	Number of processes in the run queue.
I32 hmTotProcBlocked	1.3.6.1.4.1.42.2.12.2.2.11.4.1.2	Integer32	read-only	Number of processes blocked for resources.
I32 hmTotProcReadyInSwap	1.3.6.1.4.1.42.2.12.2.2.11.4.1.3	Integer32	read-only	Number of processes runnable but swapped.
hmDiskGroup	1.3.6.1.4.1.42.2.12.2.2.11.5			Disk related statistics.
hmDiskTable	1.3.6.1.4.1.42.2.12.2.2.11.5.1		not-accessible	Table of information for all the disks installed on the system.
hmDiskEntry	1.3.6.1.4.1.42.2.12.2.2.11.5.1.1		not-accessible	Monitoring information for one disk on the system.
STR hmDiskName	1.3.6.1.4.1.42.2.12.2.2.11.5.1.1.1	DisplayString	read-only	Name of the disk.
STR hmDiskAliasName	1.3.6.1.4.1.42.2.12.2.2.11.5.1.1.2	DisplayString	read-only	Name of the disk alias (for example, c0t0d0).
STR hmAvgWaitTransactions	1.3.6.1.4.1.42.2.12.2.2.11.5.1.1.3	DisplayString	read-only	Average number of transactions waiting for service.
STR hmDiskBusyPcnt	1.3.6.1.4.1.42.2.12.2.2.11.5.1.1.4	DisplayString	read-only	Percent of time the disk is busy.
STR hmAvgDiskSvcTime	1.3.6.1.4.1.42.2.12.2.2.11.5.1.1.5	DisplayString	read-only	Average service time.
hmRAM	1.3.6.1.4.1.42.2.12.2.2.11.6
hmRamMemoryPagingGroup	1.3.6.1.4.1.42.2.12.2.2.11.6.1			Memory paging-related statistics.
I32 hmHandspread	1.3.6.1.4.1.42.2.12.2.2.11.6.1.1	Integer32	read-only	The distance (in pages) between front and back pageout daemon hands. The pageout daemon manages two hands on the clock. The front hand moves through memory, clearing the reference bit, and stealing pages from processes that exceed the value maxrss. The back hand travels behind the front hand, freeing pages that have not been referenced since the front hand passed. If the pages have been modified, they are pushed to the swap space before being freed. After pageout examines a page of memory, the amount of time that is needed to reclaim the page increases as the distance increases between the two hands, and decreases as the scan rate rises.
I32 hmPageScanRate	1.3.6.1.4.1.42.2.12.2.2.11.6.1.2	Integer32	read-only	Number of pages scanned per second.
hmKMEM	1.3.6.1.4.1.42.2.12.2.2.11.7
hmKmemStatisticsGroup	1.3.6.1.4.1.42.2.12.2.2.11.7.1			Kernel-memory-related statistics.
I32 hmKmemErrors	1.3.6.1.4.1.42.2.12.2.2.11.7.1.1	Integer32	read-only	Total number of error occured related to kernel memory. These errors may be.. KMERR_MODIFIED: buffer modified after being fread KMERR_READZONE: readzone violation, write past end of buffer KMERR_BADADDR: invalid free KMERR_DUPFREE: duplicate free KMERR_BADBUFTAG: boundary tag corrupted etc.
I32 hmKmemFreeMem	1.3.6.1.4.1.42.2.12.2.2.11.7.1.2	Integer32	read-only	Total amount of free kernel memory in MB.
hmDNLC	1.3.6.1.4.1.42.2.12.2.2.11.8
hmDNLCStatGroup	1.3.6.1.4.1.42.2.12.2.2.11.8.1			DNLC related statistics.
U32 hmDNLCHits	1.3.6.1.4.1.42.2.12.2.2.11.8.1.1	Unsigned32	read-only	The number of times a name is looked up and is found in DNLC (Directory Name Lookup Cache).
U32 hmDNLCMisses	1.3.6.1.4.1.42.2.12.2.2.11.8.1.2	Unsigned32	read-only	The number of times a name is looked up and is not found in DNLC (Directory Name Lookup Cache).
U32 hmDNLCHitRate	1.3.6.1.4.1.42.2.12.2.2.11.8.1.3	Unsigned32	read-only	The number of DNLC hits as a proportion of all DNLC lookups.
U32 hmDNLCRefRate	1.3.6.1.4.1.42.2.12.2.2.11.8.1.4	Unsigned32	read-only	The number of times per second, the DNLC is looked up.

RFC description

Sun Management Center health monitor MIB for system state monitoring including disk, memory, CPU, NFS and kernel contention.

Start monitoring Sun/Solaris server (SPARC/x86) managed by Sun Management Center (Health Monitor) with a free 30-day trial of IPNetwork Monitor. Import MIBs, browse SNMP OIDs, create custom SNMP monitors, configure alerts, and monitor any SNMP-enabled network device from a single console.

Download HEALTH-MONITOR-SUNMANAGEMENTCENTER-MIB