mem

Documentation

Overview

SPDX-License-Identifier: BSD-3-Clause

Index

• type ExLinux
  • func NewExLinux() *ExLinux
  • func (ex *ExLinux) VirtualMemory() (*ExVirtualMemory, error)
  • func (ex *ExLinux) VirtualMemoryWithContext(ctx context.Context) (*ExVirtualMemory, error)
• type ExVirtualMemory
  • func (v ExVirtualMemory) String() string
• type SwapDevice
  • func SwapDevices() ([]*SwapDevice, error)
  • func SwapDevicesWithContext(ctx context.Context) ([]*SwapDevice, error)
  • func (m SwapDevice) String() string
• type SwapMemoryStat
  • func SwapMemory() (*SwapMemoryStat, error)
  • func SwapMemoryWithContext(ctx context.Context) (*SwapMemoryStat, error)
  • func (m SwapMemoryStat) String() string
• type VirtualMemoryStat
  • func VirtualMemory() (*VirtualMemoryStat, error)
  • func VirtualMemoryWithContext(ctx context.Context) (*VirtualMemoryStat, error)
  • func (m VirtualMemoryStat) String() string

Types

type ExLinux

type ExLinux struct{}

func NewExLinux

func NewExLinux() *ExLinux

func (*ExLinux) VirtualMemory

func (ex *ExLinux) VirtualMemory() (*ExVirtualMemory, error)

func (*ExLinux) VirtualMemoryWithContext

func (ex *ExLinux) VirtualMemoryWithContext(ctx context.Context) (*ExVirtualMemory, error)

type ExVirtualMemory

type ExVirtualMemory struct {
	ActiveFile   uint64 `json:"activefile"`
	InactiveFile uint64 `json:"inactivefile"`
	ActiveAnon   uint64 `json:"activeanon"`
	InactiveAnon uint64 `json:"inactiveanon"`
	Unevictable  uint64 `json:"unevictable"`
}

func (ExVirtualMemory) String

func (v ExVirtualMemory) String() string

type SwapDevice

type SwapDevice struct {
	Name      string `json:"name"`
	UsedBytes uint64 `json:"usedBytes"`
	FreeBytes uint64 `json:"freeBytes"`
}

func SwapDevices

func SwapDevices() ([]*SwapDevice, error)

func SwapDevicesWithContext

func SwapDevicesWithContext(ctx context.Context) ([]*SwapDevice, error)

func (SwapDevice) String

func (m SwapDevice) String() string

type SwapMemoryStat

type SwapMemoryStat struct {
	Total       uint64  `json:"total"`
	Used        uint64  `json:"used"`
	Free        uint64  `json:"free"`
	UsedPercent float64 `json:"usedPercent"`
	Sin         uint64  `json:"sin"`
	Sout        uint64  `json:"sout"`
	PgIn        uint64  `json:"pgIn"`
	PgOut       uint64  `json:"pgOut"`
	PgFault     uint64  `json:"pgFault"`

	// Linux specific numbers
	// https://www.kernel.org/doc/Documentation/cgroup-v2.txt
	PgMajFault uint64 `json:"pgMajFault"`
}

func SwapMemory

func SwapMemory() (*SwapMemoryStat, error)

func SwapMemoryWithContext

func SwapMemoryWithContext(ctx context.Context) (*SwapMemoryStat, error)

func (SwapMemoryStat) String

func (m SwapMemoryStat) String() string

type VirtualMemoryStat

type VirtualMemoryStat struct {
	// Total amount of RAM on this system
	Total uint64 `json:"total"`

	// RAM available for programs to allocate
	//
	// This value is computed from the kernel specific values.
	Available uint64 `json:"available"`

	// RAM used by programs
	//
	// This value is computed from the kernel specific values.
	Used uint64 `json:"used"`

	// Percentage of RAM used by programs
	//
	// This value is computed from the kernel specific values.
	UsedPercent float64 `json:"usedPercent"`

	// This is the kernel's notion of free memory; RAM chips whose bits nobody
	// cares about the value of right now. For a human consumable number,
	// Available is what you really want.
	Free uint64 `json:"free"`

	// OS X / BSD specific numbers:
	// http://www.macyourself.com/2010/02/17/what-is-free-wired-active-and-inactive-system-memory-ram/
	Active   uint64 `json:"active"`
	Inactive uint64 `json:"inactive"`
	Wired    uint64 `json:"wired"`

	// FreeBSD specific numbers:
	// https://reviews.freebsd.org/D8467
	Laundry uint64 `json:"laundry"`

	// Linux specific numbers
	// https://www.centos.org/docs/5/html/5.1/Deployment_Guide/s2-proc-meminfo.html
	// https://www.kernel.org/doc/Documentation/filesystems/proc.txt
	// https://www.kernel.org/doc/Documentation/vm/overcommit-accounting
	// https://www.kernel.org/doc/Documentation/vm/transhuge.txt
	Buffers        uint64 `json:"buffers"`
	Cached         uint64 `json:"cached"`
	WriteBack      uint64 `json:"writeBack"`
	Dirty          uint64 `json:"dirty"`
	WriteBackTmp   uint64 `json:"writeBackTmp"`
	Shared         uint64 `json:"shared"`
	Slab           uint64 `json:"slab"`
	Sreclaimable   uint64 `json:"sreclaimable"`
	Sunreclaim     uint64 `json:"sunreclaim"`
	PageTables     uint64 `json:"pageTables"`
	SwapCached     uint64 `json:"swapCached"`
	CommitLimit    uint64 `json:"commitLimit"`
	CommittedAS    uint64 `json:"committedAS"`
	HighTotal      uint64 `json:"highTotal"`
	HighFree       uint64 `json:"highFree"`
	LowTotal       uint64 `json:"lowTotal"`
	LowFree        uint64 `json:"lowFree"`
	SwapTotal      uint64 `json:"swapTotal"`
	SwapFree       uint64 `json:"swapFree"`
	Mapped         uint64 `json:"mapped"`
	VmallocTotal   uint64 `json:"vmallocTotal"`
	VmallocUsed    uint64 `json:"vmallocUsed"`
	VmallocChunk   uint64 `json:"vmallocChunk"`
	HugePagesTotal uint64 `json:"hugePagesTotal"`
	HugePagesFree  uint64 `json:"hugePagesFree"`
	HugePagesRsvd  uint64 `json:"hugePagesRsvd"`
	HugePagesSurp  uint64 `json:"hugePagesSurp"`
	HugePageSize   uint64 `json:"hugePageSize"`
	AnonHugePages  uint64 `json:"anonHugePages"`
}

Memory usage statistics. Total, Available and Used contain numbers of bytes for human consumption.

The other fields in this struct contain kernel specific values.

func VirtualMemory

func VirtualMemory() (*VirtualMemoryStat, error)

func VirtualMemoryWithContext

func VirtualMemoryWithContext(ctx context.Context) (*VirtualMemoryStat, error)

func (VirtualMemoryStat) String

func (m VirtualMemoryStat) String() string