Designing and implementing active swap algorithm of managing physical page.
设计并实现了具有主动交换机制的物理页面管理算法。
TLB is the cache holding the mapping information from the virtual address to the physical page in memory.
TLB缓存包含从虚拟地址到内存中物理页面的映射信息。
Reverse mapping provides a mechanism for discovering which processes are using a given physical page of memory.
反向映射提供了一个发现哪些进程正在使用给定的内存物理页的机制。
Figure 1 illustrates how virtual pages in a process's address space are mapped to physical page frames in memory.
图1说明了进程地址空间中的虚拟页如何映射到内存中的物理页帧。
How does kernel know, which pages in the virtual address space correspond to a swapped out physical page frame?
如何知道哪些页面的内核，在虚拟地址空间对应于一个换出的物理页帧？
Advantage of mapping/unmapping mechanism is that the same physical page could be mapped into different VAS's regions.
映射和非映射机制的好处是相同的物理页可以被映射到不同VAS空间。
From Operating System theory, OS implements a page table entry, PTE, to describe a mapping of a page in VAS to physical page.
来自操作系统的理论，操作系统引入一个页表项，PTE，描述了一个在VAS中的页到物理页的映射。
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。
For a particular virtual page, a page table entry will give a corresponding physical page or note that the page is not present (indicating a page fault).
对于一个特定的虚拟页，根据一条页表记录可以找到对应的物理页，或者是页无法找到的提示(说明存在一个页错误)。
In the Linux memory manager, page tables keep track of the physical pages of memory that are used by a process, and they map the virtual pages to the physical pages.
在Linux内存管理器中，页表保持对进程使用的内存物理页的追踪，它们将虚拟页映射到物理页。
My prose will always look so flawless on the screen, but then I read the same words on the physical page and I suddenly see all my clichés and banalities and excesses.
在屏幕上，看起来一切都没问题。而当我在纸质稿上审阅相同的内容时，才会突然意识到文章里的陈词滥调，冗词赘句或哪里太平铺直叙了。
If the number of pages indexed for your site is much more than the actual physical pages on your site, the search engine may be keeping duplicate copies of the same page.
如果索引的页面数量超过站点页面的真实数量，那么该搜索引擎可能保留了相同页面的重复副本。
A kernel USES page descriptors to keep track of all physical pages. Each page frame has a corresponding page descriptor. In a page descriptor the information about state of page is stored.
内核用页描述符来确保能找到所有的页，每个页都有相应的页描述符，页描述符里存放这页状态的有关信息。
Though the broad outline of a scientific theory can be sketched intuitively, when a part of the physical universe is finally understood, its description often looks like a page in a mathematics text.
尽管科学理论的大致框架能被直观地勾勒出来，但当物质世界的一部分最终被理解时，它的描述看起来通常就像数学课本中的一页内容。
This is achieved through URIs that refer not to a physical file on the server, but to content which can be delivered from a script or page in a different location.
这可以通过一种特殊URI 来实现，这种 URI不引用服务器上的物理文件，而是引用从不同位置中的脚本或页面提供的内容。
The mapping of virtual memory to physical memory occurs through page tables, which are implemented in the underlying hardware (see Figure 1).
虚拟内存到物理内存的映射通过页表完成，这是在底层软件中实现的(见图1)。
By default, the system does not allocate any memory to the large page physical memory pool.
在默认情况下，系统并不为大页面物理内存池分配任何内存。
Note that as shown here, a process may have a large address space, but it is sparse, meaning that small regions (pages) of the address space refer to physical memory through the page tables.
注意这里的显示，进程可能有一个大的地址空间，但是很少见，就是说小的地址空间的区域(页面)通过页表指向物理内存。
For each running process, the mapping between virtual and physical address is maintained in a data structure called the page table.
对于每个正在运行的进程，虚拟地址与物理地址之间的映射是在一个称作页表的数据结构中维护的。
A DSI occurs whenever a reference is made to a virtual address that is not currently loaded in physical memory (this is a page fault).
如果对当前不在物理内存中加载的虚拟地址进行引用(这是一个页面错误)，则会出现DSI错误。
Fewer buffer pools and table Spaces and fewer distinct page sizes lead to a simpler physical database design which is easier to manage, maintain, and tune.
更少的缓冲池和表空间，以及更少的页宽种类，可以导致更简单的物理数据库设计，从而更容易管理、维护和调优。
If the page is unmodified, the page replacement daemon can simply mark the physical memory block as free, and the physical memory block can then be re-used for another page.
如果该分页没有经过修改，那么分页替换守护进程可以简单地将物理内存块标记为空闲，这样一来，就可以将该物理内存块重用于另一个分页。
Instead of translating changes between individuals and groups, physical data models put data architects, developers, and database administrators stay on the same page.
物理数据模型将数据架构师、开发人员和数据库管理员统一起来，而不是在个人与组之间转换更改。
In loading a website, a page loads faster when the physical server is located closer to the user.
当物理服务器越是接近用户加载一个网站，一个页面的速度越快速。
The physical memory block that contains the page is marked as free and ready for reuse for additional pages.
将包含该分页的物理内存块标记为空闲，并为其它的分页做好重用的准备。
Physical storage is also organized into equal-sized units, most commonly known as page frames.
物理存储页组织成大小相同的单位，通常称为页帧。
To specify the code page to use for a physical file or table, use either of these two approaches.
为了指定用于物理文件或表的代码页，要使用下面两种方法之一。
On DB2 UDB for iSeries, a code page can be specified per physical file or table within a database.
在DB2UDBfor iSeries 上，数据库中的每个物理文件或表都可以指定一个代码页。
The hypervisor converts a virtual address to a system-wide physical address using the global partition page tables.
Hypervisor使用全局分区页表将虚拟地址转换为系统范围的物理地址。
On x86, the size of a large page is 4 MB, or 2MB on systems with physical address extension (PAE) turned on.
在x86 上，大内存页的大小是4MB，或者，在物理地址扩展（PAE）打开的系统上是2 MB。
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