virtual memory

virtual memory

美 　英

• n.虚拟存储（器）；虚拟内存
• 网络虚拟记忆体；虚拟存储器；虚存

英汉双解

英汉解释

na.	1. 【计】虚存,虚拟存储器

英英解释

n.	1. space on a computer’s hard drive that the software can use as a temporary place to store information

例句

Before executing, the test adjusts its total memory usage according to how much real and virtual memory exist on the system.

在执行之前，测试会根据系统中存在多少物理和虚拟内存来调整其总的内存使用情况。

The actual schema of the table (Listing 1) used in the Informix port of this agent includes how much virtual memory is allocated and used.

该代理的Informix端口中使用的表的实际模式（清单1）包括分配和使用多少虚拟内存。

It is how much page file space would be used if all the private committed virtual memory in the system had to be paged out all at once.

换言之，如果系统中所有的私有提交虚拟内存不得不一次性全部被换出去的话，将用到多少页面文件空间。

Reserved memory is the virtual memory space reserved for the application but no disk or main memory pages have been used.

保留内存是为应用程序保留（但尚未使用任何磁盘或主内存页）的虚拟内存空间。

If the disk is the same as the one used for virtual memory, then it might be a problem with lack of memory and too much swapping.

如果该磁盘同时用作虚拟内存，那么可能是因为缺少内存和过多的交换的问题。

AIX newbies are sometimes surprised to hear that the VMM services all memory requests from the system, not just virtual memory.

有时候，令AIX新手感到困惑的是，VMM服务如何处理系统中所有的内存请求，而不仅仅是虚拟内存本身。

It is also easy to see the virtual memory savings when running the example program in more than one JVM.

在多个JVM中运行示例程序时，很容易看出虚拟内存的节省。

This counter can be used to measure the degree to which available virtual memory is being fragmented .

此计数器可用于度量可用虚拟内存的碎片化程度。

The operating system creates the illusion of multiple processes , each executing on its own processor with its own ( virtual ) memory .

操作系统创建了多个进程，每一个进程有自己的处理器和（虚拟）内存。

Try to allocate your hard disk to different logical volumes, which can make it easy to expand virtual memory in different logical volumes.

尝试将硬盘分配给不同的逻辑卷，这能够以不同的卷轻松扩展虚拟内存。

Virtual memory allows multiple processes to share physical memory without being able to corrupt one another's data.

虚拟内存允许多个进程共享物理内存，而且不会破坏彼此的数据。

In a computer with virtual memory, less-used parts of programs are shifted from RAM to a hard disk and are moved back only when needed.

在使用了虚拟存储器的计算机中，很少使用的程序被从RAM移到硬盘中，仅当需要时才被移回来。

First, we'll take a look at tmpfs, also known as the virtual memory (VM) filesystem.

首先，我们会简单地介绍一下tmpfs，也就是我们知道的虚拟内存（virtualmemory，VM）文件系统。

The virtual memory size property for each of the components in the pattern can be locked at the time of authoring.

模式中的每个组件的虚拟内存大小属性都可以在创建时锁定。

To understand the reverse mapping technique, let's quickly go through some fundamentals of the Linux virtual memory system.

为了理解反向映射技术，让我们来首先简单了解Linux虚拟内存系统的一些基本原理。

Virtual addresses used by an application program are mapped into physical addresses by the virtual memory system.

在虚拟内存机制下，应用程序通过使用虚拟地址来映射物理地址。

With this option, allocations from the "special" pool lie at the end of a page that's followed in virtual memory by a not- present page.

使用这个选项，从“特别”池分配的内存位于一个页的最后，它通过一个非当前页跟随在虚拟内存中。

Virtual memory Games tend to be huge consumers of memory, so any memory swapping is bound to produce slow-downs.

虚拟内存游戏趋于消耗大量的内存，所以任何一个内存交换技术必然会产生缓慢下调。

It's important to understand that the VMM services all memory requests from the system, not just virtual memory.

VMM为系统中所有的内存请求（而不仅仅是虚拟内存的内存请求）提供服务，了解这一点是非常重要的。

VM Size: The online help describes this as the "total private virtual memory allocated by the process. "

VMSize（虚拟内存大小）：联机帮助将其称为“分配给进程私有虚拟内存总数。”

This might seem a bit arbitrary at first, but remember that tmpfs is also known as the "virtual memory filesystem" .

刚开始这看起来可能有点武断，但请记住tmpfs也是我们知道的“虚拟内存文件系统”。

While this may not seem like a positive, tmpfs data is not preserved between reboots, because virtual memory is volatile in nature.

这看起来可能不象是个积极因素，tmpfs数据在重新启动之后不会保留，因为虚拟内存本质上就是易失的。

Even with these improvements to virtual memory, it is still important that you monitor virtual memory performance.

虽然对虚拟内存进行了这些改进，但是监视虚拟内存的性能仍然很重要。

In the next post we'll go back up the abstraction ladder to take a thorough look at virtual memory.

在下一期，我们将返回抽象的阶段将实际的存储过程研究透彻。

Mapping between the application buffer pool and AWE-mapped memory is handled through manipulation of the Windows virtual memory tables.

应用程序缓冲池和AWE映射内存之间的映射通过操作Windows虚拟内存表来完成。

In the modern implementation of virtual memory that Windows uses, virtual storage is organized into equal-sized units known as pages.

Windows所使用的现代虚拟内存实现中，虚拟存储被组织成大小相同的单位，称为页。

ps -aux command. VSZ is Virtual Set Size, the total virtual memory size of the process. ie. the total amount of memory in swap and RAM.

VSZ是虚拟集合的大小，即进程占用的全部虚拟内存，具体来说就是交换区和RAM的总大小。

The virtual memory subsystem has been enhanced with a reverse-mapping algorithm, which provides improvements in memory constrained systems.

通过使用反向映射算法，虚拟内存子系统已经得到了提高，这为内存受限的系统带来了改进。

If you try to tune a server when there is no free CPU or where the operating system is swapping virtual memory, you won't get very far.

如果您在没有空闲CPU时或者在操作系统需要交换虚拟内存的地方试图优化服务器，则无法使其变得很快。

The size of virtual memory for a process is 4GB with one quarter of the process space reserved for the Linux kernel.

一个进程的虚拟内存的大小是4GB，其中四分之一的进程空间是为Linux内核预留的。

Virtual memory addresses of the data to be sent are provided to a sending agent.

待发送数据的虚拟存储地址被提供给发送代理。

Just like with other forms of UNIX, AIX employs virtual memory structures to help complement physical memory.

与其他风格的UNIX一样，AIX也使用虚拟内存结构帮助补充物理内存。

However, inlining too much code might make your program so large that the number of virtual-memory page faults increases.

但是，内嵌过多的程式码可能会使程式过大，而增加虚拟记忆体的分页错误数目。

The Linux kernel operates in a virtual memory mode: for every virtual page there is a corresponding physical page of memory in the system.

Linux内核工作于虚拟内存模式：每一个虚拟页对应一个相应的系统内存的物理页。

This parameter is provided to ensure that an application does not consume unnecessarily large amounts of virtual memory within an agent.

提供这个参数是为了确保应用程序不会不必要地消耗代理中的大量虚拟内存。

Other channels are used to access virtual memory associated with a user context on the PPE.

其他通道用来访问与PPE上的用户上下文关联在一起的虚拟内存。

Virtual memory subsystem enhancements, including a reverse-mapping algorithm that provides improvements in memory-constrained systems.

虚拟内存子系统改进，包括在内存压力比较大的系统中提供的反向映射算法。

Tmpfs also makes use of the disk swap space for storage, and of the virtual memory (VM) subsystem when requesting pages for storing files.

tmpfs还使用磁盘交换空间来存储，并且当为存储文件而请求页面时，使用虚拟内存（VM）子系统。

m = Memory Gives you more details on where your memory is going, system (kernel) and processes, and active virtual memory.

m=内存（Memory）提供内存使用的更详细的信息，如系统（内核）和进程、活动虚拟内存。

Displays the total number of free virtual memory blocks that are greater than or equal to 16 MB.

显示大于或等于16MB的可用虚拟内存块的总数。