Recently, learning Linux drivers, installing a Ubuntu10.4 system in VMware, allocated about 700MB of memory.
But there is a problem, because a lot of operations are done under the character command interface, basically rarely use the graphical interface, so, using windowsxp under the virtual network provided by VMware directly connected to the virtual system,
oracle| process
Oracle Process Memory Architecture-how to view memory consumed by Oracle processes
Last Updated:sunday, 2004-11-28 11:12 eygle
It is often asked how the memory resources consumed by the process are determined under UNIX, and why the top tool is displayed
Today, I saw StackOverflow on how to see how the memory of a process occupied by the answer, feel very good, but the whole English, many people may not understand, so I translate
Translated from http://stackoverflow.com/questions/3853655/in-linux-how-to-tell-how-much-memory-processes-are-using
The way you can view the memory
1. Under Linux, look at a running program, how much memory is consumed, and the general commands are(1). PS aux:where the VSZ (or VSS) column represents how much virtual memory the program occupies.The RSS column indicates how much physical memory the program occupies.Virtual memor
priority level of the process, the smaller the higher the priority is executedNinice: ValueVIRT: Virtual memory consumed by the processRES: The physical memory occupied by the processSHR: Shared memory used by the processS: The state of the process. s for hibernation, R for running, Z for Zombie, n for the process pri
This article mainly introduces the PowerShell implementation of dynamic acquisition of the current script running memory consumption, this article directly gives the implementation of script functions, the need for friends can refer to the
To get a rough idea of how much memory a script consumes, or how much memory is consum
To test the memory and time consumed by code execution in php, we can directly use the two functions, microtime and memory_get_usage. I will introduce them to you.
Let's take a look at the usage of the microtime and memory_get_usage functions.
Meaning and usage
Microtime ()The function returns the current Unix Timestamp and the number of microseconds.
Syntax
Microtime (get_as_float) parameter descriptionIf
PowerShell dynamically obtains the memory consumed by the current script
This article mainly introduces how PowerShell can dynamically obtain the memory consumed by the current script running. This article describes how to implement the script function. For more information, see
To roughly understand how much
The memory used by a program compiled by C + + is divided into the following sections 1, stack (stack)-Automatically allocated by the compiler to release, store the function's parameter value, the value of the local variable, and so on. It operates in a manner similar to a stack in a data structure. 2, heap area (heap)-Generally by the programmer assigned to release, if the programmer does not release, the end of the program may be recycled by the OS.
multiples of 8, and the object occupies a multiple of the total space (object header + declaration variable) less than 8, and is automatically padded. And, these filled spaces, we can call it "filler." Let's take a look at the specific examples:
An empty object (without declaring any variables) takes up 8 bytes--> object Header occupies 8 bytes
A class that only declares a Boolean variable, occupies a bytes-to-Object header (8 bytes) + Boolean (1 bytes) + filler (7 bytes)
Class
To get a rough idea of how much memory a script consumes, or how much memory is consumed when you save a result to a variable in PowerShell, you can use the following function:
#requires-version 2
$script: last_memory_usage_byte = 0
function get-memoryusage
{
$memusagebyte = [ System.gc]::gettotalmemory (' forcefullcollection ')
$memusageMB = $memusag
the return valueThe validation results are as follows:650) this.width=650; "src=" Http://s5.51cto.com/wyfs02/M02/82/95/wKiom1dbzaGQpYIzAAAeAcu3dRs935.png "title=" 5.png " alt= "Wkiom1dbzagqpyizaaaeacu3drs935.png"/>We can visit Apache several times in the following ways to see the change in memory percentageYum Install-y elinksElinks-dump http://localhostThis article is from the "M April Days" blog, please be sure to keep this source http://msiyuetian
1.instrumentation This method is still reliable.How many bytes does an object occupy?2.sizeof Library3.How much memory does a Java object account for? simple estimation of database data in Java-occupied memoryHow large is an object in Java, and how much memory is consumed
The implementation code is as follows:#!/usr/bin/python#coding:utf8from subprocess Import Popen, Pipeimport osnginxpid = Popen (["Pidof", "Nginx"], stdout= PIPE) Nginxpid = Nginxpid.stdout.read (). Split () Memsum = 0for i in nginxpid:pidfile = Os.path.join ("/proc/", str (i), "St ATUs ") with open (Pidfile) as F:for mem in F:if mem.startswith (" Vmrss "): Pidmem = Int ( Mem.split () [1]) Memsum + = Pidmemprint ("%d%s"% (Memsum, "KB"))This article is from the "Blue _ Storm" blog, make sure to ke
I have posted a post on the VMware Memory mechanism in Vmsky's forum (see this http://bbs.vmsky.com/thread-23285-1-2.html), and the last example is an account of the free memory tax (Idle Memory Tax, hereinafter referred to as IMT) in the case of memory allocation calculatio
overuse (memory over-commitment) in its main competing product VMware ESX. Microsoft claims for a long time that it is dangerous for the virtual machine to take over the physical memory, because all these virtual machines may need to be allocated at the same time. Whether this is true or not, we generally use over-subscribe in other IT fields, such as storage. M
The administrator runs the cmd command, input (copy-paste directly) SC config NDU start= disabled because of a memory leak caused by the Microsoft Ndu driver. It is also possible that the virtual machine uninstall is not clean caused. It can also be a program bug.Just to try, I was unloading the virtual machine after the non-paged pool memory 1.6G, the boot memory
After writing "A preliminary discussion of the memory mechanism of VMware", it was planned to write a "VMware memory mechanism re-explore", talking about several other important aspects of the VMware Memory mechanism, such as tran
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