UCD-SNMP-MIB

All MIBs › UCD-SNMP-MIB

Organization: University of California, Davis

Last Updated: 2020-08-21

Category: Net-SNMP and Linux, Routing Protocols

Description: University of California Davis SNMP extensions for Linux/Unix host monitoring: CPU load averages, memory/swap usage, disk utilization, running processes, and extensible script execution.

IPNetwork Monitor uses several OIDs from this MIB in network discovery and polling the applicable devices. Start monitoring UCD-SNMP-MIB with a free 30-day trial of IPNetwork Monitor.

What Is UCD-SNMP-MIB?

UCD-SNMP-MIB is a widely used private MIB module originating from the University of California, Davis SNMP project (the precursor to Net-SNMP), often still called simply the ucd snmp mib by longtime administrators, providing host-monitoring extensions for Unix/Linux systems beyond standard MIB-II. It exposes categories including CPU load averages, memory and swap usage, disk space utilization, running-process monitoring, and an extensible mechanism for executing custom shell scripts and reporting their output/exit codes via SNMP. Its purpose is squarely hardware/software status monitoring: the process table (prTable/prEntry) lets an operator confirm a named process is running and within expected min/max instance counts, prErrorFlag/prErrMessage surface failures (with prErrFixCmd able to trigger an automatic remediation command), and the broader UCD extensions cover load average, memory, and disk thresholds that are classic leading indicators of a Unix/Linux host running into resource exhaustion. It has no formal dependency on other MIBs beyond standard SNMPv2-SMI conventions, since it was designed as a self-contained set of practical host-monitoring extensions layered on top of standard MIB-II. It is ubiquitously deployed on Linux/Unix servers running the Net-SNMP agent (net-snmp/snmpd), making it one of the most common private MIBs encountered in general server monitoring.

IPNetwork Monitor allows you to monitor SNMP objects defined in UCD-SNMP-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

Unix/Linux servers running the Net-SNMP (net-snmp/snmpd) agent

Monitoring Examples

An administrator would configure prTable/prEntry entries (prNames, prMin, prMax) to watch that a critical daemon process stays within its expected running-instance count, and poll prErrorFlag/prErrMessage to detect when that check fails - for example a crashed web server process dropping the running count below prMin, with prErrFixCmd able to automatically attempt a restart. Beyond the process table, the module's well-known load-average, memory, and disk objects (grouped under ucdInternal/ucdExperimental in this listing) are commonly polled to catch a Linux host approaching CPU saturation, swap exhaustion, or a full disk partition before it causes an outage.

What Can Be Monitored

CPU load averages
memory and swap usage
disk space utilization
running process count/status vs. thresholds
custom script execution results/exit codes

Imported Objects

From HCNUM-TC

CounterBasedGauge64

From SNMPv2-SMI

Counter32
Integer32
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE
Opaque
Unsigned32
enterprises

From SNMPv2-TC

DisplayString
TEXTUAL-CONVENTION
TruthValue

How to Use in IPNetwork Monitor

Example using memBuffer OID:

Select a Unix/Linux server running the Net-SNMP (net-snmp/snmpd) agent 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 memBuffer into the Find box to locate it in the OID tree, then select it and click OK. It reports the total amount of real or virtual memory currently allocated for use as memory buffers, in KB. 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 grows well beyond its normal baseline without leveling off, since continuously rising buffer allocation can indicate memory pressure. Click Finish to create the monitor; you can adjust any parameter later.

See also: memTotalFree, memTotalSwap

OIDs

OID symbolic	OID numeric	Type	Access	Description
aix	1.3.6.1.4.1.2021.250.15
bsdi	1.3.6.1.4.1.2021.250.11
dragonfly	1.3.6.1.4.1.2021.250.17
I32 dskAvail	1.3.6.1.4.1.2021.9.1.7	Integer32	read-only	Available space on the disk. For large lightly-used disks (>2Tb), this value will latch at INT32_MAX (2147483647).
U32 dskAvailHigh	1.3.6.1.4.1.2021.9.1.14	Unsigned32	read-only	Available space on the disk (kBytes). Together with dskAvailLow composes 64-bit number.
U32 dskAvailLow	1.3.6.1.4.1.2021.9.1.13	Unsigned32	read-only	Available space on the disk (kBytes). Together with dskAvailHigh composes 64-bit number.
STR dskDevice	1.3.6.1.4.1.2021.9.1.3	DisplayString	read-only	Path of the device for the partition
dskEntry	1.3.6.1.4.1.2021.9.1		not-accessible	An entry containing a disk and its statistics.
UCD dskErrorFlag	1.3.6.1.4.1.2021.9.1.100	UCDErrorFlag	read-only	Error flag signaling that the disk or partition is under the minimum required space configured for it.
STR dskErrorMsg	1.3.6.1.4.1.2021.9.1.101	DisplayString	read-only	A text description providing a warning and the space left on the disk.
I32 dskIndex	1.3.6.1.4.1.2021.9.1.1	Integer32	read-only	Integer reference number (row number) for the disk mib.
I32 dskMinimum	1.3.6.1.4.1.2021.9.1.4	Integer32	read-only	Minimum space required on the disk (in kBytes) before the errors are triggered. Either this or dskMinPercent is configured via the agent's snmpd.conf file.
I32 dskMinPercent	1.3.6.1.4.1.2021.9.1.5	Integer32	read-only	Percentage of minimum space required on the disk before the errors are triggered. Either this or dskMinimum is configured via the agent's snmpd.conf file.
STR dskPath	1.3.6.1.4.1.2021.9.1.2	DisplayString	read-only	Path where the disk is mounted.
I32 dskPercent	1.3.6.1.4.1.2021.9.1.9	Integer32	read-only	Percentage of space used on disk
I32 dskPercentNode	1.3.6.1.4.1.2021.9.1.10	Integer32	read-only	Percentage of inodes used on disk
dskTable	1.3.6.1.4.1.2021.9		not-accessible	Disk watching information. Partions to be watched are configured by the snmpd.conf file of the agent.
I32 dskTotal	1.3.6.1.4.1.2021.9.1.6	Integer32	read-only	Total size of the disk/partion (kBytes). For large disks (>2Tb), this value will latch at INT32_MAX (2147483647).
U32 dskTotalHigh	1.3.6.1.4.1.2021.9.1.12	Unsigned32	read-only	Total size of the disk/partion (kBytes). Together with dskTotalLow composes 64-bit number.
U32 dskTotalLow	1.3.6.1.4.1.2021.9.1.11	Unsigned32	read-only	Total size of the disk/partion (kBytes). Together with dskTotalHigh composes 64-bit number.
I32 dskUsed	1.3.6.1.4.1.2021.9.1.8	Integer32	read-only	Used space on the disk. For large heavily-used disks (>2Tb), this value will latch at INT32_MAX (2147483647).
U32 dskUsedHigh	1.3.6.1.4.1.2021.9.1.16	Unsigned32	read-only	Used space on the disk (kBytes). Together with dskUsedLow composes 64-bit number.
U32 dskUsedLow	1.3.6.1.4.1.2021.9.1.15	Unsigned32	read-only	Used space on the disk (kBytes). Together with dskUsedHigh composes 64-bit number.
STR extCommand	1.3.6.1.4.1.2021.8.1.3	DisplayString	read-only	The command line to be executed.
extEntry	1.3.6.1.4.1.2021.8.1		not-accessible	An entry containing an extensible script/program and its output.
UCD extErrFix	1.3.6.1.4.1.2021.8.1.102	UCDErrorFix	read-write	Setting this to one will try to fix the problem if the agent has been configured with a script to call to attempt to fix problems automatically using remote snmp operations.
STR extErrFixCmd	1.3.6.1.4.1.2021.8.1.103	DisplayString	read-only	The command that gets run when the extErrFix column is set to 1.
I32 extIndex	1.3.6.1.4.1.2021.8.1.1	Integer32	read-only	Reference Index for extensible scripts. Simply an integer row number.
STR extNames	1.3.6.1.4.1.2021.8.1.2	DisplayString	read-only	A Short, one name description of the extensible command.
STR extOutput	1.3.6.1.4.1.2021.8.1.101	DisplayString	read-only	The first line of output of the executed command.
I32 extResult	1.3.6.1.4.1.2021.8.1.100	Integer32	read-only	The result code (exit status) from the executed command.
extTable	1.3.6.1.4.1.2021.8		not-accessible	A table of extensible commands returning output and result codes. These commands are configured via the agent's snmpd.conf file.
fileEntry	1.3.6.1.4.1.2021.15.1		not-accessible	Entry of file
UCD fileErrorFlag	1.3.6.1.4.1.2021.15.1.100	UCDErrorFlag	read-only	Limit exceeded flag
STR fileErrorMsg	1.3.6.1.4.1.2021.15.1.101	DisplayString	read-only	Filesize error message
I32 fileIndex	1.3.6.1.4.1.2021.15.1.1	Integer32	read-only	Index of file
I32 fileMax	1.3.6.1.4.1.2021.15.1.4	Integer32	read-only	Limit of filesize (kB)
STR fileName	1.3.6.1.4.1.2021.15.1.2	DisplayString	read-only	Filename
I32 fileSize	1.3.6.1.4.1.2021.15.1.3	Integer32	read-only	Size of file (kB)
fileTable	1.3.6.1.4.1.2021.15		not-accessible	Table of monitored files.
freebsd	1.3.6.1.4.1.2021.250.8
hpux10	1.3.6.1.4.1.2021.250.6
hpux11	1.3.6.1.4.1.2021.250.14
hpux9	1.3.6.1.4.1.2021.250.1
irix	1.3.6.1.4.1.2021.250.9
STR laConfig	1.3.6.1.4.1.2021.10.1.4	DisplayString	read-write	The watch point for load-averages to signal an error. If the load averages rises above this value, the laErrorFlag below is set.
laEntry	1.3.6.1.4.1.2021.10.1		not-accessible	An entry containing a load average and its values.
STR laErrMessage	1.3.6.1.4.1.2021.10.1.101	DisplayString	read-only	An error message describing the load-average and its surpased watch-point value.
UCD laErrorFlag	1.3.6.1.4.1.2021.10.1.100	UCDErrorFlag	read-only	A Error flag to indicate the load-average has crossed its threshold value defined in the snmpd.conf file. It is set to 1 if the threshold is crossed, 0 otherwise.
I32 laIndex	1.3.6.1.4.1.2021.10.1.1	Integer32	read-only	reference index/row number for each observed loadave.
STR laLoad	1.3.6.1.4.1.2021.10.1.3	DisplayString	read-only	The 1,5 and 15 minute load averages (one per row).
FLO laLoadFloat	1.3.6.1.4.1.2021.10.1.6	Float	read-only	The 1,5 and 15 minute load averages as an opaquely wrapped floating point number.
I32 laLoadInt	1.3.6.1.4.1.2021.10.1.5	Integer32	read-only	The 1,5 and 15 minute load averages as an integer. This is computed by taking the floating point loadaverage value and multiplying by 100, then converting the value to an integer.
STR laNames	1.3.6.1.4.1.2021.10.1.2	DisplayString	read-only	The list of loadave names we're watching.
laTable	1.3.6.1.4.1.2021.10		not-accessible	Load average information.
linux	1.3.6.1.4.1.2021.250.10
logMatch	1.3.6.1.4.1.2021.16
I32 logMatchCount	1.3.6.1.4.1.2021.16.2.1.10	Integer32	read-only	Description.
C32 logMatchCounter	1.3.6.1.4.1.2021.16.2.1.9	Counter32	read-only	Regex match counter. This counter will be reset with each read
I32 logMatchCurrentCount	1.3.6.1.4.1.2021.16.2.1.8	Integer32	read-only	Description.
C32 logMatchCurrentCounter	1.3.6.1.4.1.2021.16.2.1.7	Counter32	read-only	Regex match counter. This counter will be reset with each logfile rotation.
I32 logMatchCycle	1.3.6.1.4.1.2021.16.2.1.11	Integer32	read-only	time between updates (if not queried) in seconds
logMatchEntry	1.3.6.1.4.1.2021.16.2.1		not-accessible	Entry of file
UCD logMatchErrorFlag	1.3.6.1.4.1.2021.16.2.1.100	UCDErrorFlag	read-only	errorflag: is this line configured correctly?
STR logMatchFilename	1.3.6.1.4.1.2021.16.2.1.3	DisplayString	read-only	filename to be logmatched
I32 logMatchGlobalCount	1.3.6.1.4.1.2021.16.2.1.6	Integer32	read-only	Description.
C32 logMatchGlobalCounter	1.3.6.1.4.1.2021.16.2.1.5	Counter32	read-only	global count of matches
I32 logMatchIndex	1.3.6.1.4.1.2021.16.2.1.1	Integer32	read-only	Index of logmatch
I32 logMatchMaxEntries	1.3.6.1.4.1.2021.16.1	Integer32	read-only	The maximum number of logmatch entries this snmpd daemon can support.
STR logMatchName	1.3.6.1.4.1.2021.16.2.1.2	DisplayString	read-only	logmatch instance name
STR logMatchRegEx	1.3.6.1.4.1.2021.16.2.1.4	DisplayString	read-only	regular expression
STR logMatchRegExCompilation	1.3.6.1.4.1.2021.16.2.1.101	DisplayString	read-only	message of regex precompilation
logMatchTable	1.3.6.1.4.1.2021.16.2		not-accessible	Table of monitored files.
macosx	1.3.6.1.4.1.2021.250.16
I32 memAvailReal	1.3.6.1.4.1.2021.4.6	Integer32	read-only	The amount of real/physical memory currently unused or available.
I32 memAvailRealTXT	1.3.6.1.4.1.2021.4.10	Integer32	read-only	The amount of real/physical memory currently being used by text pages on this host. This object will not be implemented on hosts where the underlying operating system does not distinguish text pages from other uses of physical memory. Note that (despite the name), this value reports the amount used, rather than the amount free or available for use. For clarity, this object is being deprecated in favour of 'memUsedRealTXT(17).
NUM memAvailRealX	1.3.6.1.4.1.2021.4.21	CounterBasedGauge64	read-only	The amount of real/physical memory currently unused or available.
I32 memAvailSwap	1.3.6.1.4.1.2021.4.4	Integer32	read-only	The amount of swap space currently unused or available.
I32 memAvailSwapTXT	1.3.6.1.4.1.2021.4.8	Integer32	read-only	The amount of swap space or virtual memory currently being used by text pages on this host. This object will not be implemented on hosts where the underlying operating system does not distinguish text pages from other uses of swap space or virtual memory. Note that (despite the name), this value reports the amount used, rather than the amount free or available for use. For clarity, this object is being deprecated in favour of 'memUsedSwapTXT(16).
NUM memAvailSwapX	1.3.6.1.4.1.2021.4.19	CounterBasedGauge64	read-only	The amount of swap space currently unused or available.
I32 memBufferEx	1.3.6.1.4.1.2021.4.14	Integer32	read-only	The total amount of real or virtual memory currently allocated for use as memory buffers. This object will not be implemented on hosts where the underlying operating system does not explicitly identify memory as specifically reserved for this purpose.
NUM memBufferX	1.3.6.1.4.1.2021.4.25	CounterBasedGauge64	read-only	The total amount of real or virtual memory currently allocated for use as memory buffers. This object will not be implemented on hosts where the underlying operating system does not explicitly identify memory as specifically reserved for this purpose.
I32 memCached	1.3.6.1.4.1.2021.4.15	Integer32	read-only	The total amount of real or virtual memory currently allocated for use as cached memory. This object will not be implemented on hosts where the underlying operating system does not explicitly identify memory as specifically reserved for this purpose.
NUM memCachedX	1.3.6.1.4.1.2021.4.26	CounterBasedGauge64	read-only	The total amount of real or virtual memory currently allocated for use as cached memory. This object will not be implemented on hosts where the underlying operating system does not explicitly identify memory as specifically reserved for this purpose.
STR memErrorName	1.3.6.1.4.1.2021.4.2	DisplayString	read-only	Bogus Name. This should always return the string 'swap'.
I32 memIndex	1.3.6.1.4.1.2021.4.1	Integer32	read-only	Bogus Index. This should always return the integer 0.
I32 memMinimumSwap	1.3.6.1.4.1.2021.4.12	Integer32	read-only	The minimum amount of swap space expected to be kept free or available during normal operation of this host. If this value (as reported by 'memAvailSwap(4)') falls below the specified level, then 'memSwapError(100)' will be set to 1 and an error message made available via 'memSwapErrorMsg(101)'.
NUM memMinimumSwapX	1.3.6.1.4.1.2021.4.23	CounterBasedGauge64	read-only	The minimum amount of swap space expected to be kept free or available during normal operation of this host. If this value (as reported by 'memAvailSwap(4)') falls below the specified level, then 'memSwapError(100)' will be set to 1 and an error message made available via 'memSwapErrorMsg(101)'.
memory	1.3.6.1.4.1.2021.4
I32 memShared	1.3.6.1.4.1.2021.4.13	Integer32	read-only	The total amount of real or virtual memory currently allocated for use as shared memory. This object will not be implemented on hosts where the underlying operating system does not explicitly identify memory as specifically reserved for this purpose.
NUM memSharedX	1.3.6.1.4.1.2021.4.24	CounterBasedGauge64	read-only	The total amount of real or virtual memory currently allocated for use as shared memory. This object will not be implemented on hosts where the underlying operating system does not explicitly identify memory as specifically reserved for this purpose.
UCD memSwapError	1.3.6.1.4.1.2021.4.100	UCDErrorFlag	read-only	Indicates whether the amount of available swap space (as reported by 'memAvailSwap(4)'), is less than the desired minimum (specified by 'memMinimumSwap(12)').
STR memSwapErrorMsg	1.3.6.1.4.1.2021.4.101	DisplayString	read-only	Describes whether the amount of available swap space (as reported by 'memAvailSwap(4)'), is less than the desired minimum (specified by 'memMinimumSwap(12)').
NUM memSysAvail	1.3.6.1.4.1.2021.4.27	CounterBasedGauge64	read-only	The total amount of available memory, which is an estimate of how much memory is available for starting new applications, without swapping. This object will not be implemented on hosts where the underlying operating system does not explicitly identify memory as specifically reserved for this purpose.
I32 memTotalFreeEx	1.3.6.1.4.1.2021.4.11	Integer32	read-only	The total amount of memory free or available for use on this host. This value typically covers both real memory and swap space or virtual memory.
NUM memTotalFreeX	1.3.6.1.4.1.2021.4.22	CounterBasedGauge64	read-only	The total amount of memory free or available for use on this host. This value typically covers both real memory and swap space or virtual memory.
I32 memTotalReal	1.3.6.1.4.1.2021.4.5	Integer32	read-only	The total amount of real/physical memory installed on this host.
I32 memTotalRealTXT	1.3.6.1.4.1.2021.4.9	Integer32	read-only	The total amount of real/physical memory allocated for text pages on this host. This object will not be implemented on hosts where the underlying operating system does not distinguish text pages from other uses of physical memory.
NUM memTotalRealX	1.3.6.1.4.1.2021.4.20	CounterBasedGauge64	read-only	The total amount of real/physical memory installed on this host.
I32 memTotalSwapEx	1.3.6.1.4.1.2021.4.3	Integer32	read-only	The total amount of swap space configured for this host.
I32 memTotalSwapTXT	1.3.6.1.4.1.2021.4.7	Integer32	read-only	The total amount of swap space or virtual memory allocated for text pages on this host. This object will not be implemented on hosts where the underlying operating system does not distinguish text pages from other uses of swap space or virtual memory.
NUM memTotalSwapX	1.3.6.1.4.1.2021.4.18	CounterBasedGauge64	read-only	The total amount of swap space configured for this host.
I32 memUsedRealTXT	1.3.6.1.4.1.2021.4.17	Integer32	read-only	The amount of real/physical memory currently being used by text pages on this host. This object will not be implemented on hosts where the underlying operating system does not distinguish text pages from other uses of physical memory.
I32 memUsedSwapTXT	1.3.6.1.4.1.2021.4.16	Integer32	read-only	The amount of swap space or virtual memory currently being used by text pages on this host. This object will not be implemented on hosts where the underlying operating system does not distinguish text pages from other uses of swap space or virtual memory.
mrEntry	1.3.6.1.4.1.2021.102.1		not-accessible	An entry containing a registered mib oid.
OID mrIndex	1.3.6.1.4.1.2021.102.1.1	OBJECT IDENTIFIER	read-only	The registry slot of a mibmodule.
STR mrModuleName	1.3.6.1.4.1.2021.102.1.2	DisplayString	read-only	The module name that registered this OID.
mrTable	1.3.6.1.4.1.2021.102		not-accessible	A table displaying all the oid's registered by mib modules in the agent. Since the agent is modular in nature, this lists each module's OID it is responsible for and the name of the module
netbsd1	1.3.6.1.4.1.2021.250.7
openbsd	1.3.6.1.4.1.2021.250.12
osf	1.3.6.1.4.1.2021.250.4
I32 prCount	1.3.6.1.4.1.2021.2.1.5	Integer32	read-only	The number of current processes running with the name in question.
prEntry	1.3.6.1.4.1.2021.2.1		not-accessible	An entry containing a process and its statistics.
UCD prErrFix	1.3.6.1.4.1.2021.2.1.102	UCDErrorFix	read-write	Setting this to one will try to fix the problem if the agent has been configured with a script to call to attempt to fix problems automatically using remote snmp operations.
STR prErrFixCmd	1.3.6.1.4.1.2021.2.1.103	DisplayString	read-only	The command that gets run when the prErrFix column is set to 1.
STR prErrMessage	1.3.6.1.4.1.2021.2.1.101	DisplayString	read-only	An error message describing the problem (if one exists).
UCD prErrorFlag	1.3.6.1.4.1.2021.2.1.100	UCDErrorFlag	read-only	A Error flag to indicate trouble with a process. It goes to 1 if there is an error, 0 if no error.
I32 prIndex	1.3.6.1.4.1.2021.2.1.1	Integer32	read-only	Reference Index for each observed process.
I32 prMax	1.3.6.1.4.1.2021.2.1.4	Integer32	read-only	The maximum number of processes that should be running. An error flag is generated if the number of running processes is > the maximum.
I32 prMin	1.3.6.1.4.1.2021.2.1.3	Integer32	read-only	The minimum number of processes that should be running. An error flag is generated if the number of running processes is < the minimum.
STR prNames	1.3.6.1.4.1.2021.2.1.2	DisplayString	read-only	The process name we're counting/checking on.
prTable	1.3.6.1.4.1.2021.2		not-accessible	A table containing information on running programs/daemons configured for monitoring in the snmpd.conf file of the agent. Processes violating the number of running processes required by the agent's configuration file are flagged with numerical and textual errors.
STR snmperrErrMessage	1.3.6.1.4.1.2021.101.101	DisplayString	read-only	An error message describing the problem (if one exists).
UCD snmperrErrorFlag	1.3.6.1.4.1.2021.101.100	UCDErrorFlag	read-only	A Error flag to indicate trouble with the agent. It goes to 1 if there is an error, 0 if no error.
I32 snmperrIndex	1.3.6.1.4.1.2021.101.1	Integer32	read-only	Bogus Index for snmperrs (always 0).
STR snmperrNames	1.3.6.1.4.1.2021.101.2	DisplayString	read-only	snmp
snmperrs	1.3.6.1.4.1.2021.101
solaris	1.3.6.1.4.1.2021.250.3
I32 ssCpuIdle	1.3.6.1.4.1.2021.11.11	Integer32	read-only	The percentage of processor time spent idle, calculated over the last minute. This object has been deprecated in favour of 'ssCpuRawIdle(53)', which can be used to calculate the same metric, but over any desired time period.
I32 ssCpuNumCpus	1.3.6.1.4.1.2021.11.67	Integer32	read-only	The number of processors, as counted by the agent. This object's value may be useful in the management of certain operating systems where notions such as load average do not take into account the number of processors in the system. For other objects in the systemStats group whose descriptions refer to 'N processors', this object's value is N.
C32 ssCpuRawGuest	1.3.6.1.4.1.2021.11.65	Counter32	read-only	The number of 'ticks' (typically 1/100s) spent by the CPU to run a virtual CPU (guest). This object will not be implemented on hosts where the underlying operating system does not measure this particular CPU metric. On a multi-processor system, the 'ssCpuRaw' counters are cumulative over all CPUs, so their sum will typically be N100 (for N processors).
C32 ssCpuRawGuestNice	1.3.6.1.4.1.2021.11.66	Counter32	read-only	The number of 'ticks' (typically 1/100s) spent by the CPU to run a niced virtual CPU (guest). This object will not be implemented on hosts where the underlying operating system does not measure this particular CPU metric. On a multi-processor system, the 'ssCpuRaw' counters are cumulative over all CPUs, so their sum will typically be N100 (for N processors).
C32 ssCpuRawIdle	1.3.6.1.4.1.2021.11.53	Counter32	read-only	The number of 'ticks' (typically 1/100s) spent idle. On a multi-processor system, the 'ssCpuRaw' counters are cumulative over all CPUs, so their sum will typically be N100 (for N processors).
C32 ssCpuRawInterrupt	1.3.6.1.4.1.2021.11.56	Counter32	read-only	The number of 'ticks' (typically 1/100s) spent processing hardware interrupts. This object will not be implemented on hosts where the underlying operating system does not measure this particular CPU metric. On a multi-processor system, the 'ssCpuRaw' counters are cumulative over all CPUs, so their sum will typically be N100 (for N processors).
C32 ssCpuRawKernel	1.3.6.1.4.1.2021.11.55	Counter32	read-only	The number of 'ticks' (typically 1/100s) spent processing kernel-level code. This object will not be implemented on hosts where the underlying operating system does not measure this particular CPU metric. This time may also be included within the 'ssCpuRawSystem(52)' counter. On a multi-processor system, the 'ssCpuRaw' counters are cumulative over all CPUs, so their sum will typically be N100 (for N processors).
C32 ssCpuRawNice	1.3.6.1.4.1.2021.11.51	Counter32	read-only	The number of 'ticks' (typically 1/100s) spent processing reduced-priority code. This object will not be implemented on hosts where the underlying operating system does not measure this particular CPU metric. On a multi-processor system, the 'ssCpuRaw' counters are cumulative over all CPUs, so their sum will typically be N100 (for N processors).
C32 ssCpuRawSoftIRQ	1.3.6.1.4.1.2021.11.61	Counter32	read-only	The number of 'ticks' (typically 1/100s) spent processing software interrupts. This object will not be implemented on hosts where the underlying operating system does not measure this particular CPU metric. On a multi-processor system, the 'ssCpuRaw' counters are cumulative over all CPUs, so their sum will typically be N100 (for N processors).
C32 ssCpuRawSteal	1.3.6.1.4.1.2021.11.64	Counter32	read-only	The number of 'ticks' (typically 1/100s) spent by the hypervisor code to run other VMs even though the CPU in the current VM had something runnable. This object will not be implemented on hosts where the underlying operating system does not measure this particular CPU metric. On a multi-processor system, the 'ssCpuRaw' counters are cumulative over all CPUs, so their sum will typically be N100 (for N processors).
C32 ssCpuRawSystem	1.3.6.1.4.1.2021.11.52	Counter32	read-only	The number of 'ticks' (typically 1/100s) spent processing system-level code. On a multi-processor system, the 'ssCpuRaw' counters are cumulative over all CPUs, so their sum will typically be N100 (for N processors). This object may sometimes be implemented as the combination of the 'ssCpuRawWait(54)' and 'ssCpuRawKernel(55)' counters, so care must be taken when summing the overall raw counters.
C32 ssCpuRawUser	1.3.6.1.4.1.2021.11.50	Counter32	read-only	The number of 'ticks' (typically 1/100s) spent processing user-level code. On a multi-processor system, the 'ssCpuRaw' counters are cumulative over all CPUs, so their sum will typically be N100 (for N processors).
C32 ssCpuRawWait	1.3.6.1.4.1.2021.11.54	Counter32	read-only	The number of 'ticks' (typically 1/100s) spent waiting for IO. This object will not be implemented on hosts where the underlying operating system does not measure this particular CPU metric. This time may also be included within the 'ssCpuRawSystem(52)' counter. On a multi-processor system, the 'ssCpuRaw' counters are cumulative over all CPUs, so their sum will typically be N100 (for N processors).
I32 ssCpuSystem	1.3.6.1.4.1.2021.11.10	Integer32	read-only	The percentage of CPU time spent processing system-level code, calculated over the last minute. This object has been deprecated in favour of 'ssCpuRawSystem(52)', which can be used to calculate the same metric, but over any desired time period.
I32 ssCpuUser	1.3.6.1.4.1.2021.11.9	Integer32	read-only	The percentage of CPU time spent processing user-level code, calculated over the last minute. This object has been deprecated in favour of 'ssCpuRawUser(50)', which can be used to calculate the same metric, but over any desired time period.
STR ssErrorName	1.3.6.1.4.1.2021.11.2	DisplayString	read-only	Bogus Name. This should always return the string 'systemStats'.
I32 ssIndex	1.3.6.1.4.1.2021.11.1	Integer32	read-only	Bogus Index. This should always return the integer 1.
C32 ssIORawReceived	1.3.6.1.4.1.2021.11.58	Counter32	read-only	Number of blocks received from a block device
C32 ssIORawSent	1.3.6.1.4.1.2021.11.57	Counter32	read-only	Number of blocks sent to a block device
I32 ssIOReceive	1.3.6.1.4.1.2021.11.6	Integer32	read-only	The average amount of data read from disk or other block device, calculated over the last minute. This object has been deprecated in favour of 'ssIORawReceived(58)', which can be used to calculate the same metric, but over any desired time period.
I32 ssIOSent	1.3.6.1.4.1.2021.11.5	Integer32	read-only	The average amount of data written to disk or other block device, calculated over the last minute. This object has been deprecated in favour of 'ssIORawSent(57)', which can be used to calculate the same metric, but over any desired time period.
C32 ssRawContexts	1.3.6.1.4.1.2021.11.60	Counter32	read-only	Number of context switches
C32 ssRawInterrupts	1.3.6.1.4.1.2021.11.59	Counter32	read-only	Number of interrupts processed
C32 ssRawSwapIn	1.3.6.1.4.1.2021.11.62	Counter32	read-only	Number of blocks swapped in
C32 ssRawSwapOut	1.3.6.1.4.1.2021.11.63	Counter32	read-only	Number of blocks swapped out
I32 ssSwapIn	1.3.6.1.4.1.2021.11.3	Integer32	read-only	The average amount of memory swapped in from disk, calculated over the last minute.
I32 ssSwapOut	1.3.6.1.4.1.2021.11.4	Integer32	read-only	The average amount of memory swapped out to disk, calculated over the last minute.
I32 ssSysContext	1.3.6.1.4.1.2021.11.8	Integer32	read-only	The average rate of context switches, calculated over the last minute. This object has been deprecated in favour of 'ssRawContext(60)', which can be used to calculate the same metric, but over any desired time period.
I32 ssSysInterrupts	1.3.6.1.4.1.2021.11.7	Integer32	read-only	The average rate of interrupts processed (including the clock) calculated over the last minute. This object has been deprecated in favour of 'ssRawInterrupts(59)', which can be used to calculate the same metric, but over any desired time period.
sunos4	1.3.6.1.4.1.2021.250.2
systemStats	1.3.6.1.4.1.2021.11
ucdavis	1.3.6.1.4.1.2021			This file defines the private UCD SNMP MIB extensions.
ucdExperimental	1.3.6.1.4.1.2021.13
ucdInternal	1.3.6.1.4.1.2021.12
NTF ucdShutdown	1.3.6.1.4.1.2021.251.2			This trap is sent when the agent terminates
ucdSnmpAgent	1.3.6.1.4.1.2021.250
NTF ucdStart	1.3.6.1.4.1.2021.251.1			This trap could in principle be sent when the agent start
ucdTraps	1.3.6.1.4.1.2021.251
ultrix	1.3.6.1.4.1.2021.250.5
unknown	1.3.6.1.4.1.2021.250.255
version	1.3.6.1.4.1.2021.100
STR versionCDate	1.3.6.1.4.1.2021.100.4	DisplayString	read-only	Date string from ctime()
I32 versionClearCache	1.3.6.1.4.1.2021.100.10	Integer32	read-write	Set to 1 to clear the exec cache, if enabled
STR versionConfigureOptions	1.3.6.1.4.1.2021.100.6	DisplayString	read-only	Options passed to the configure script when this agent was built.
STR versionDate	1.3.6.1.4.1.2021.100.3	DisplayString	read-only	Date string from RCS keyword
I32 versionDoDebugging	1.3.6.1.4.1.2021.100.20	Integer32	read-write	Set to 1 to turn debugging statements on in the agent or 0 to turn it off.
STR versionIdent	1.3.6.1.4.1.2021.100.5	DisplayString	read-only	Id string from RCS keyword
I32 versionIndex	1.3.6.1.4.1.2021.100.1	Integer32	read-only	Index to mib (always 0)
I32 versionRestartAgent	1.3.6.1.4.1.2021.100.12	Integer32	read-write	Set to 1 to restart the agent.
I32 versionSavePersistentData	1.3.6.1.4.1.2021.100.13	Integer32	read-write	Set to 1 to force the agent to save it's persistent data immediately.
STR versionTag	1.3.6.1.4.1.2021.100.2	DisplayString	read-only	CVS tag keyword
I32 versionUpdateConfig	1.3.6.1.4.1.2021.100.11	Integer32	read-write	Set to 1 to read-read the config file(s).
win32	1.3.6.1.4.1.2021.250.13

RFC description

University of California Davis private SNMP MIB extensions maintained by net-snmp project, including process, disk, and load monitoring (OID 1.3.6.1.4.1.2021).

Start monitoring Unix/Linux servers running the Net-SNMP (net-snmp/snmpd) agent (CPU/memory/disk/process-table status) 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 UCD-SNMP-MIB