V$OSSTAT

V$OSSTAT displays system utilization statistics from the operating system. One row is returned for each system statistic.

Column	Datatype	Description
`STAT_NAME`	`VARCHAR2(64)`	Name of the statistic (see Table 7-1)
`VALUE`	`NUMBER`	Instantaneous statistic value
`OSSTAT_ID`	`NUMBER`	Statistic ID

Table 7-1 V$OSSTAT Statistics

Statistic Name	Description
NUM_CPUS	Number of CPUs or processors available
IDLE_TIME	Number of hundredths of a second that a processor has been idle, totalled over all processors
BUSY_TIME	Number of hundredths of a second that a processor has been busy executing user or kernel code, totalled over all processors
USER_TIME	Number of hundredths of a second that a processor has been busy executing user code, totalled over all processors
SYS_TIME	Number of hundredths of a second that a processor has been busy executing kernel code, totalled over all processors
IOWAIT_TIME	Number of hundredths of a second that a processor has been waiting for I/O to complete, totalled over all processors
NICE_TIME	Number of hundredths of a second that a processor has been busy executing low-priority user code, totalled over all processors
AVG_IDLE_TIME	Number of hundredths of a second that a processor has been idle, averaged over all processors
AVG_BUSY_TIME	Number of hundredths of a second that a processor has been busy executing user or kernel code, averaged over all processors
AVG_USER_TIME	Number of hundredths of a second that a processor has been busy executing user code, averaged over all processors
AVG_SYS_TIME	Number of hundredths of a second that a processor has been busy executing kernel code, averaged over all processors
AVG_IOWAIT_TIME	Number of hundredths of a second that a processor has been waiting for I/O to complete, averaged over all processors
AVG_NICE_TIME	Number of hundredths of a second that a processor has been busy executing low-priority user code, averaged over all processors
OS_CPU_WAIT_TIME	Total number of hundredths of a second that processes have been in a ready state, waiting to be selected by the operating system scheduler to run
RSRC_MGR_CPU_WAIT_TIME	Total number of hundredths of a second that Oracle processes have been in a ready state, waiting for CPU to be available for their consumer group in the currently active resource plan
VM_PAGE_IN_BYTES	Total number of bytes of data that have been paged in due to virtual memory paging
VM_PAGE_OUT_BYTES	Total number of bytes of data that have been paged out due to virtual memory paging
PHYSICAL_MEMORY_BYTES	Total number of bytes of physical memory
LOAD	Current number of processes that are either running or in the ready state, waiting to be selected by the operating-system scheduler to run. On many platforms, this statistic reflects the average load over the past minute.
NUM_CPU_CORES	Number of CPU cores available (includes subcores of multicore CPUs as well as single-core CPUs)
NUM_CPU_SOCKETS	Number of CPU sockets available (represents an absolute count of CPU chips on the system, regardless of multithreading or multi-core architectures)

Note:

The availability of all statistics except for NUM_CPUS and RSRC_MGR_CPU_WAIT_TIME is subject to the operating system platform on which the Oracle Database is running.