OS metrics in Enhanced Monitoring

Amazon RDS provides metrics in real time for the operating system (OS) that your DB instance runs on. RDS delivers the metrics from Enhanced Monitoring to your Amazon CloudWatch Logs account. The following tables list the OS metrics available using Amazon CloudWatch Logs.

OS metrics for Db2, MariaDB, MySQL, Oracle, and PostgreSQL

Group	Metric	Console name	Description
General	engine	Not applicable	The database engine for the DB instance.
	instanceID	Not applicable	The DB instance identifier.
	instanceResourceID	Not applicable	An immutable identifier for the DB instance that is unique to an AWS Region, also used as the log stream identifier.
	numVCPUs	Not applicable	The number of virtual CPUs for the DB instance.
	timestamp	Not applicable	The time at which the metrics were taken.
	uptime	Not applicable	The amount of time that the DB instance has been active.
	version	Not applicable	The version of the OS metrics' stream JSON format.
cpuUtilization	guest	CPU Guest	The percentage of CPU in use by guest programs.
	idle	CPU Idle	The percentage of CPU that is idle.
	irq	CPU IRQ	The percentage of CPU in use by software interrupts.
	nice	CPU Nice	The percentage of CPU in use by programs running at lowest priority.
	steal	CPU Steal	The percentage of CPU in use by other virtual machines.
	system	CPU System	The percentage of CPU in use by the kernel.
	total	CPU Total	The total percentage of the CPU in use. This value includes the nice value.
	user	CPU User	The percentage of CPU in use by user programs.
	wait	CPU Wait	The percentage of CPU unused while waiting for I/O access.
diskIO	avgQueueLen	Avg Queue Size	The number of requests waiting in the I/O device's queue.
	avgReqSz	Ave Request Size	The average request size, in kilobytes.
	await	Disk I/O Await	The number of milliseconds required to respond to requests, including queue time and service time.
	device	Not applicable	The identifier of the disk device in use.
	readIOsPS	Read IO/s	The number of read operations per second.
	readKb	Read Total	The total number of kilobytes read.
	readKbPS	Read Kb/s	The number of kilobytes read per second.
	readLatency	Read Latency	The elapsed time between the submission of a read I/O request and its completion, in milliseconds. This metric is only available for Amazon Aurora.
	readThroughput	Read Throughput	The amount of network throughput used by requests to the DB cluster, in bytes per second. This metric is only available for Amazon Aurora.
	rrqmPS	Rrqms	The number of merged read requests queued per second.
	tps	TPS	The number of I/O transactions per second.
	util	Disk I/O Util	The percentage of CPU time during which requests were issued.
	writeIOsPS	Write IO/s	The number of write operations per second.
	writeKb	Write Total	The total number of kilobytes written.
	writeKbPS	Write Kb/s	The number of kilobytes written per second.
	writeLatency	Write Latency	The average elapsed time between the submission of a write I/O request and its completion, in milliseconds. This metric is only available for Amazon Aurora.
	writeThroughput	Write Throughput	The amount of network throughput used by responses from the DB cluster, in bytes per second. This metric is only available for Amazon Aurora.
	wrqmPS	Wrqms	The number of merged write requests queued per second.
physicalDeviceIO	avgQueueLen	Physical Devices Avg Queue Size	The number of requests waiting in the I/O device's queue.
	avgReqSz	Physical Devices Ave Request Size	The average request size, in kilobytes.
	await	Physical Devices Disk I/O Await	The number of milliseconds required to respond to requests, including queue time and service time.
	device	Not applicable	The identifier of the disk device in use.
	readIOsPS	Physical Devices Read IO/s	The number of read operations per second.
	readKb	Physical Devices Read Total	The total number of kilobytes read.
	readKbPS	Physical Devices Read Kb/s	The number of kilobytes read per second.
	rrqmPS	Physical Devices Rrqms	The number of merged read requests queued per second.
	tps	Physical Devices TPS	The number of I/O transactions per second.
	util	Physical Devices Disk I/O Util	The percentage of CPU time during which requests were issued.
	writeIOsPS	Physical Devices Write IO/s	The number of write operations per second.
	writeKb	Physical Devices Write Total	The total number of kilobytes written.
	writeKbPS	Physical Devices Write Kb/s	The number of kilobytes written per second.
	wrqmPS	Physical Devices Wrqms	The number of merged write requests queued per second.
fileSys	maxFiles	Max Inodes	The maximum number of files that can be created for the file system.
	mountPoint	Not applicable	The path to the file system.
	name	Not applicable	The name of the file system.
	total	Total Filesystem	The total number of disk space available for the file system, in kilobytes.
	used	Used Filesystem	The amount of disk space used by files in the file system, in kilobytes.
	usedFilePercent	Used Inodes	The percentage of available files in use.
	usedFiles	Used%	The number of files in the file system.
	usedPercent	Used Filesystem	The percentage of the file-system disk space in use.
loadAverageMinute	fifteen	Load Avg 15 min	The number of processes requesting CPU time over the last 15 minutes.
	five	Load Avg 5 min	The number of processes requesting CPU time over the last 5 minutes.
	one	Load Avg 1 min	The number of processes requesting CPU time over the last minute.
memory	active	Active Memory	The amount of assigned memory, in kilobytes.
	buffers	Buffered Memory	The amount of memory used for buffering I/O requests prior to writing to the storage device, in kilobytes.
	cached	Cached Memory	The amount of memory used for caching file system–based I/O.
	dirty	Dirty Memory	The amount of memory pages in RAM that have been modified but not written to their related data block in storage, in kilobytes.
	free	Free Memory	The amount of unassigned memory, in kilobytes.
	hugePagesFree	Huge Pages Free	The number of free huge pages. Huge pages are a feature of the Linux kernel.
	hugePagesRsvd	Huge Pages Rsvd	The number of committed huge pages.
	hugePagesSize	Huge Pages Size	The size for each huge pages unit, in kilobytes.
	hugePagesSurp	Huge Pages Surp	The number of available surplus huge pages over the total.
	hugePagesTotal	Huge Pages Total	The total number of huge pages.
	inactive	Inactive Memory	The amount of least-frequently used memory pages, in kilobytes.
	mapped	Mapped Memory	The total amount of file-system contents that is memory mapped inside a process address space, in kilobytes.
	pageTables	Page Tables	The amount of memory used by page tables, in kilobytes.
	slab	Slab Memory	The amount of reusable kernel data structures, in kilobytes.
	total	Total Memory	The total amount of memory, in kilobytes.
	writeback	Writeback Memory	The amount of dirty pages in RAM that are still being written to the backing storage, in kilobytes.
network	interface	Not applicable	The identifier for the network interface being used for the DB instance.
	rx	RX	The number of bytes received per second.
	tx	TX	The number of bytes uploaded per second.
processList	cpuUsedPc	CPU %	The percentage of CPU used by the process.
	id	Not applicable	The identifier of the process.
	memoryUsedPc	MEM%	The percentage of memory used by the process.
	name	Not applicable	The name of the process.
	parentID	Not applicable	The process identifier for the parent process of the process.
	rss	RES	The amount of RAM allocated to the process, in kilobytes.
	tgid	Not applicable	The thread group identifier, which is a number representing the process ID to which a thread belongs. This identifier is used to group threads from the same process.
	vss	VIRT	The amount of virtual memory allocated to the process, in kilobytes.
swap	swap	Swap	The amount of swap memory available, in kilobytes.
	swap in	Swaps in	The amount of memory, in kilobytes, swapped in from disk.
	swap out	Swaps out	The amount of memory, in kilobytes, swapped out to disk.
	free	Free Swap	The amount of swap memory free, in kilobytes.
	committed	Committed Swap	The amount of swap memory, in kilobytes, used as cache memory.
tasks	blocked	Tasks Blocked	The number of tasks that are blocked.
	running	Tasks Running	The number of tasks that are running.
	sleeping	Tasks Sleeping	The number of tasks that are sleeping.
	stopped	Tasks Stopped	The number of tasks that are stopped.
	total	Tasks Total	The total number of tasks.
	zombie	Tasks Zombie	The number of child tasks that are inactive with an active parent task.

OS metrics for Microsoft SQL Server

Group	Metric	Console name	Description
General	engine	Not applicable	The database engine for the DB instance.
	instanceID	Not applicable	The DB instance identifier.
	instanceResourceID	Not applicable	An immutable identifier for the DB instance that is unique to an AWS Region, also used as the log stream identifier.
	numVCPUs	Not applicable	The number of virtual CPUs for the DB instance.
	timestamp	Not applicable	The time at which the metrics were taken.
	uptime	Not applicable	The amount of time that the DB instance has been active.
	version	Not applicable	The version of the OS metrics' stream JSON format.
cpuUtilization	idle	CPU Idle	The percentage of CPU that is idle.
	kern	CPU Kernel	The percentage of CPU in use by the kernel.
	user	CPU User	The percentage of CPU in use by user programs.
disks	name	Not applicable	The identifier for the disk.
	totalKb	Total Disk Space	The total space of the disk, in kilobytes.
	usedKb	Used Disk Space	The amount of space used on the disk, in kilobytes.
	usedPc	Used Disk Space %	The percentage of space used on the disk.
	availKb	Available Disk Space	The space available on the disk, in kilobytes.
	availPc	Available Disk Space %	The percentage of space available on the disk.
	rdCountPS	Reads/s	The number of read operations per second
	rdBytesPS	Read Kb/s	The number of bytes read per second.
	wrCountPS	Write IO/s	The number of write operations per second.
	wrBytesPS	Write Kb/s	The amount of bytes written per second.
memory	commitTotKb	Commit Total	The amount of pagefile-backed virtual address space in use, that is, the current commit charge. This value is composed of main memory (RAM) and disk (pagefiles).
	commitLimitKb	Maximum Commit	The maximum possible value for the commitTotKb metric. This value is the sum of the current pagefile size plus the physical memory available for pageable contents, excluding RAM that is assigned to nonpageable areas.
	commitPeakKb	Commit Peak	The largest value of the commitTotKb metric since the operating system was last started.
	kernTotKb	Total Kernel Memory	The sum of the memory in the paged and nonpaged kernel pools, in kilobytes.
	kernPagedKb	Paged Kernel Memory	The amount of memory in the paged kernel pool, in kilobytes.
	kernNonpagedKb	Nonpaged Kerenel Memory	The amount of memory in the nonpaged kernel pool, in kilobytes.
	pageSize	Page Size	The size of a page, in bytes.
	physTotKb	Total Memory	The amount of physical memory, in kilobytes.
	physAvailKb	Available Memory	The amount of available physical memory, in kilobytes.
	sqlServerTotKb	SQL Server Total Memory	The amount of memory committed to SQL Server, in kilobytes.
	sysCacheKb	System Cache	The amount of system cache memory, in kilobytes.
network	interface	Not applicable	The identifier for the network interface being used for the DB instance.
	rdBytesPS	Network Read Kb/s	The number of bytes received per second.
	wrBytesPS	Network Write Kb/s	The number of bytes sent per second.
processList	cpuUsedPc	Used %	The percentage of CPU used by the process.
	memUsedPc	MEM%	The percentage of total memory used by the process.
	name	Not applicable	The name of the process.
	pid	Not applicable	The identifier of the process. This value is not present for processes that are owned by Amazon RDS.
	ppid	Not applicable	The process identifier for the parent of this process. This value is only present for child processes.
	tid	Not applicable	The thread identifier. This value is only present for threads. The owning process can be identified by using the pid value.
	workingSetKb	Not applicable	The amount of memory in the private working set plus the amount of memory that is in use by the process and can be shared with other processes, in kilobytes.
	workingSetPrivKb	Not applicable	The amount of memory that is in use by a process, but can't be shared with other processes, in kilobytes.
	workingSetShareableKb	Not applicable	The amount of memory that is in use by a process and can be shared with other processes, in kilobytes.
	virtKb	Not applicable	The amount of virtual address space the process is using, in kilobytes. Use of virtual address space doesn't necessarily imply corresponding use of either disk or main memory pages.
system	handles	Handles	The number of handles that the system is using.
	processes	Processes	The number of processes running on the system.
	threads	Threads	The number of threads running on the system.