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What is inactive memory in vmstat?
vmstat is the memory size in active list and inactive list respectively. If the inactive list is large, it indicates that there are many pages that can be recycled when necessary; and if the inactive list is small, it can be recycled There are not many pages.
What does inactive memory mean?
Inactive RAM. This is the amount that has recently been used but is no longer required. It may have been used by a recently quit process, or by an active one that no longer needs it, and is not required for use.
What is vmstat command?
Command. vmstat (virtual memory statistics) is a computer system monitoring tool that collects and displays summary information about operating system memory, processes, interrupts, paging and block I/O. Users of vmstat can specify a sampling interval which permits observing system activity in near-real time.
What do you need to know about vmstat?
vmstat (virtual memory statistics) is a valuable monitoring utility, which also provides information about block IO and CPU activity in addition to memory.
How to display virtual memory statistics in Oracle?
Displaying Virtual Memory Statistics (vmstat) You can use the vmstatcommand to report virtual memory statistics and information about system events such as CPU load, paging, number of context switches, device interrupts, and system calls. The vmstatcommand can also display statistics on swapping,
What do you need to know about virtual memory statistics reporter?
However, if you need the specifics around virtual memory, you want to use vmstat. What is it? Virtual memory statistics reporter, also known as vmstat, is a Linux command-line tool that reports various bits of system information.
How are secs measured in vmstat on Linux?
For each disk, three columns are displayed, these are Reads, Writes, and IO. IO is the rightmost column. Note that the sec column in IO is measured in seconds but the time-based statistics in the read and write columns are measured in milliseconds.