8 proc.mem 监控项中memtype参数类型的注意事项

概述

Linux, AIX, FreeBSD 和 Solaris 都支持memtype参数。

‘memtype’ 参数的三个常用值 pmem, rss 和 vsize在所有系统中都适用。另外, 在一些系统中只支持该系统下的 ‘memtype’ 值。

AIX

请参见表中AIX上的“memtype”参数所支持的值.

支持的参数值描述	Source	n procentry64 structure Tries t	be compatible with
vsize (( - default value))	虚拟内存大小 pis	ze
pmem	实际内存的百分比 pi_prm	ps -o p	em
rss	驻留集大小 pi	rss + pi_drss ps -	rssize
size	进程大小(代码+数据) pi_dvm	“ps gvw	SIZE column
dsize	数据大小 pi	dsize
tsize	文本(代码)的大小 pi_ts	ze “ps gv	“ TSIZ column
sdsize	来自共享库的数据大小 pi_sdsiz
drss	数据驻留集大小 pi_dr	s
trss	文本驻留集大小 pi_tr	s

FreeBSD

请参见表中FreeBSD上的“memtype”参数支持的值。

Supported value	Description	Source in kinfoproc structure	Tries to be compatible with
vsize	虚拟内存大小 kp_e	roc.e_vm.vm_map.size or ki_size ps -o	vsz
pmem	实际内存的百分比 calcula	ed from rss ps -o p	em
rss	驻留集大小 kp	proc.e_vm.vm_rssize or ki_rssize ps -	rss
size (( - default value))	进程(代码+数据+堆栈)大小 tsize + d	ize + ssize
tsize	文本(代码)的大小 kp_ep	oc.e_vm.vm_tsize or ki_tsize ps -o	siz
dsize	数据大小 kp	eproc.e_vm.vm_dsize or ki_dsize ps	o dsiz
ssize	堆栈大小 kp	eproc.e_vm.vm_ssize or ki_ssize ps	o ssiz

Linux

请参见表中Linux上的“memtype”参数支持的值。

Supported value	Description	Source in /proc/<pid>/status file
vsize (( - default value))	虚拟内存大小 VmSiz
pmem	实际内存的百分比 (VmRSS/	otal_memory) * 100
rss	驻留集大小 VmRS
data	数据段的大小 VmDat
exe	代码段的大小 VmExe
hwm	驻留集峰值大小 VmHWM
lck	锁定内存大小 VmLck
lib	共享库的大小 VmLib
peak	虚拟内存峰值大小 VmPeak
pin	固定的页面大小 VmPin
pte	页表条目的大小 VmPTE
size	进程码+数据+栈段大小 VmExe +	mData + VmStk
stk	堆栈段大小 VmSt
swap	使用的交换空间大小 VmSwap

Linux上注意事项:

一些旧版本Linux 内核并不是支持所有’memtype’ 值的。例如, Linux 内核版本2.4就不支持 hwm, pin, peak, pte 和 swap 等值。
我们发现 Zabbix agent 主动检查进程参数proc.mem[...,...,...,...,data] 显示的值比agent 的 /proc/<pid>/status 文件中 VmData行的值大大 4 kB。在agent自我监控管理时，agent的数据碎片增长率4 kB ，然后又返回到先前的值。

Solaris

请参见表中的Solaris上的“memtype”参数所支持的值。

支持的参数值描述	Source	n psinfo structure 兼容
vsize (( - default value))	Size of process image	prsize	ps -o vsz
pmem	实际内存的百分比 pr_pct	em ps -o p	em
rss	驻留集大小 pr可能会被低估 - 参看 “man ps”中rss描述.	ssize ps -	rss

8 Notes on memtype parameter in proc.mem items

Overview

The memtype parameter is supported on Linux, AIX, FreeBSD, and Solaris platforms.

Three common values of ‘memtype’ are supported on all of these platforms: pmem, rss and vsize. Additionally, platform-specific ‘memtype’ values are supported on some platforms.

AIX

See values supported for ‘memtype’ parameter on AIX in the table.

Supported value	Description	Source in procentry64 structure	Tries to be compatible with
vsize (( - default value))	Virtual memory size	pi_size
pmem	Percentage of real memory	pi_prm	ps -o pmem
rss	Resident set size	pi_trss + pi_drss	ps -o rssize
size	Size of process (code + data)	pi_dvm	“ps gvw” SIZE column
dsize	Data size	pi_dsize
tsize	Text (code) size	pi_tsize	“ps gvw” TSIZ column
sdsize	Data size from shared library	pi_sdsize
drss	Data resident set size	pi_drss
trss	Text resident set size	pi_trss

FreeBSD

See values supported for ‘memtype’ parameter on FreeBSD in the table.

Supported value	Description	Source in kinfo_proc structure	Tries to be compatible with
vsize	Virtual memory size	kp_eproc.e_vm.vm_map.size or ki_size	ps -o vsz
pmem	Percentage of real memory	calculated from rss	ps -o pmem
rss	Resident set size	kp_eproc.e_vm.vm_rssize or ki_rssize	ps -o rss
size (( - default value))	Size of process (code + data + stack)	tsize + dsize + ssize
tsize	Text (code) size	kp_eproc.e_vm.vm_tsize or ki_tsize	ps -o tsiz
dsize	Data size	kp_eproc.e_vm.vm_dsize or ki_dsize	ps -o dsiz
ssize	Stack size	kp_eproc.e_vm.vm_ssize or ki_ssize	ps -o ssiz

Linux

See values supported for ‘memtype’ parameter on Linux in the table.

Supported value	Description	Source in /proc/<pid>/status file
vsize (( - default value))	Virtual memory size	VmSize
pmem	Percentage of real memory	(VmRSS/total_memory) * 100
rss	Resident set size	VmRSS
data	Size of data segment	VmData
exe	Size of code segment	VmExe
hwm	Peak resident set size	VmHWM
lck	Size of locked memory	VmLck
lib	Size of shared libraries	VmLib
peak	Peak virtual memory size	VmPeak
pin	Size of pinned pages	VmPin
pte	Size of page table entries	VmPTE
size	Size of process code + data + stack segments	VmExe + VmData + VmStk
stk	Size of stack segment	VmStk
swap	Size of swap space used	VmSwap

Notes for Linux:

Not all ‘memtype’ values are supported by older Linux kernels. For example, Linux 2.4 kernels do not support hwm, pin, peak, pte and swap values.
We have noticed that self-monitoring of the Zabbix agent active check process with proc.mem[...,...,...,...,data] shows a value that is 4 kB larger than reported by VmData line in the agent’s /proc/<pid>/status file. At the time of self-measurement the agent’s data segment increases by 4 kB and then returns to the previous size.

Solaris

See values supported for ‘memtype’ parameter on Solaris in the table.

Supported value	Description	Source in psinfo structure	Tries to be compatible with
vsize (( - default value))	Size of process image	pr_size	ps -o vsz
pmem	Percentage of real memory	pr_pctmem	ps -o pmem
rss	Resident set size It may be underestimated - see rss description in “man ps”.	pr_rssize	ps -o rss