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。
Figure 1 illustrates how virtual pages in a process's address space are mapped to physical page frames in 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。
Reverse mapping provides a mechanism for discovering which processes are using a given physical page of memory.
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？
How does kernel know, which pages in the virtual address space correspond to a swapped out physical page frame?
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。
Advantage of mapping/unmapping mechanism is that the same physical page could be mapped into different VAS's regions.
分页部件认为所有的RAM都被分为固定大小的页帧(有时也叫物理页面)。
The paging unit thinks of all ram as partitioned into fixed-length page frames (sometimes referred to as physical pages).
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。
The Linux kernel operates in a virtual memory mode: for every virtual page there is a corresponding physical page of memory in the system.
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。
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.
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。
From Operating System theory, OS implements a page table entry, PTE, to describe a mapping of a page in VAS to physical page.
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)。
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).
把你的“物理地址”放在网站的每一页上。
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)。
The mapping of virtual memory to physical memory occurs through page tables, which are implemented in the underlying hardware (see Figure 1).
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。
For each running process, the mapping between virtual and physical address is maintained in a data structure called the page table.
由于每个页都要由每个进程映射，必须创建页表条目来将虚拟地址映射到物理地址。
For every page mapped by each process, page-table entries must also be created to map the virtual address to the physical address.
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。
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.
这些服务器也作为DB 2页的快速缓存，它们使用RDMA技术替换原本需要物理磁盘操作的位置以提高性能。
The servers also act as a fast cache for DB2 pages, leveraging RDMA technology to provide increased performance in situations where a physical disk operation might otherwise have been required.
在基线上，我们看到必须从物理设备多读11%的页。
At the bottom line we see an additional 11% pages had to be read from the physical device.
她拿起一只钢笔，在衬页上写到：由于物理学上未知的原因，时间只朝一个方向流逝，而奇怪的是思想和思绪却能超越时间的限制。
For reasons unknown to physics, time runs only in one direction. The mind and the heart, curiously, transcend time.
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。
To specify the code page to use for a physical file or table, use either of these two approaches.
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。
On DB2 UDB for iSeries, a code page can be specified per physical file or table within a database.
Solaris中另一个与分配数据库共享内存有关的常见问题是由于这样的一个事实导致的，即共享内存段的所有页都是固定在物理ram中的。
Another common problem with allocating database Shared memory on Solaris is due to the fact that all pages of a Shared memory segment are pinned in physical RAM.
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。
The hypervisor converts a virtual address to a system-wide physical address using the global partition page tables.
Windows通过将来自不同地址空间的多个虚拟页映射到同一个物理地址来实现这种机制。
Windows does this by mapping multiple virtual pages from different address Spaces to the same physical location.
尽管没有可靠的证据证明他真的说过这句话(但人们已经在一本旧的物理学刊中的分别两页上找到了这句话)，但我仍愿意相信是他做的，因为他贱的太搞笑了。
While there's no solid evidence he really said that (people have attributed it to two different pages of an old physics journal), I like to believe he did because it's humorously bitchy.
更新块中的每个页，使之看上去为空(物理数据仍然在，但是它们的slot目录项被设为已删除)。
Updates each page of the block so that it appears empty (the physical data remains, but their slot directory entries are set to deleted).
缓冲池数据物理读数(以表空间页宽为单位定义)。
Buffer pool data physical reads (defined in units of tablespace page size).
缓冲池索引物理读数(以表空间页宽为单位定义)。
Buffer pool index physical reads (defined in units of tablespace page size).
缓冲池x da物理读数(以表空间页宽为单位定义)。
Buffer pool xda physical reads (defined in units of tablespace page size).
DB2中的备份实用程序对数据页进行物理上的复制。
The backup utility in DB2 makes physical copies of the data pages.
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。
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.
当DB 2中的数据物理上邻接(即表空间的连续页)时，很可能在SSD上是连续的单元。
When data appears to be physically adjacent in DB2 (that is, consecutive pages in the table space), it is very unlikely to be in consecutive cells on the SSD.
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