这是因为Oracle使用了大量的虚拟内存，特别是对于其系统全局区(SGA)。
This is because Oracle USES a lot of virtual memory, particularly with respect to its System Global Area (SGA).
TOC保存区、编译器区和链接器区都会为系统使用而预留出来，程序员不能对它们进行修改，但是必须要为它们预留空间。
The TOC save area, compiler area, and linker area are all reserved for system use, and are not modified by programmers, but the programmer must reserve space for them.
大多数文件系统都通过缓冲区缓存来相互通信，这种缓存通过缓存最近使用的数据来优化对物理设备的访问。
Most of the file systems communicate through a buffer cache, which is a cache that optimizes access to the physical devices by caching recently touched data.
该命令显示系统中的空闲内存、已使用的物理内存和交换内存的总量，以及内核所使用的缓冲区。
The command displays the total amount of free, used physical, and swap memory in the system, as well as the buffers used by the kernel.
缓存中缓存最近使用的缓冲区(页面)，这些缓冲区可以快速提供给各个文件系统。
Instead, the most-recently used buffers (pages) are cached here and can be quickly provided back to the individual file systems.
从2004年开始，用户应该开始避免使用这样的操作系统，即它们至少没有对缓冲区溢出提供某种自动保护机制。
Beginning in 2004, users should start avoiding any operating system that fails to provide at least some automatic protection against buffer overflows.
现在应用程序使用了143MB的物理内存，其余的内存均被缓冲区占用；另外，系统现在使用了18 MB的交换空间。
Now applications have used 143mb of physical memory, with the rest of being used for buffers; in addition, the system now needs to make use of 18mb of swap.
其他限制包括在系统运行时不能转移存储适配器，也不能让进程只使用单一分区。
Other limitations include the inability to move around storage adapters, while the system is up nor the ability to dedicate processes to a single partition.
而直接I/O 可以避免使用文件系统缓冲区，因而对于磁盘的读写更为高效。
Direct I/O bypasses the use of the file system buffers, and therefore is more efficient for reads and writes that go to disk.
需要注意，如果启用了大分页，则操作系统会留出一大块相阾的内存区供jvm使用。
Be aware that if large pages are enabled, the operating system will set aside a large continuous chunk of memory for use by the JVM.
操作系统可以将物理内存中的数据移动到未使用的交换区，以便于最充分地利用物理内存。
The OS can move data held in physical memory to and from a swap area when it isn't being used, to make the best use of physical memory.
这个命令使用klogctl系统调用来读取内核环缓冲区，并将它转发到标准输出(stdout)。
This command USES the klogctl system call to read the kernel ring buffer and emit it to standard output (stdout).
工作区本身作为一个目录存在于文件系统中，并且只局限于每个Eclipse实例使用一个。
The workspace itself exists in the file system as a directory and has the limitation of only being used per one Eclipse instance.
使用一个配置管理系统，例如ClearCase或者CVS，它们能够同步整个工作区，并且允许当那个层上发生冲突时(尽管可能性很小)对个体的片断进行合并。
Use a configuration management system such as ClearCase or CVS that can synchronize the whole workspace and allow merging of individual Fragments when rare conflicts occur at that level.
当Linux关闭时，它仔细地把所有的缓冲区数据转送到磁盘，并确保文件系统被彻底卸载，以保证系统再次启动时能够使用。
When Linux shuts down, it carefully flushes all cached data to disk and ensures that the filesystem is cleanly unmounted, so that it's ready for use when the system starts up again.
增加这个缓冲区的大小允许系统映射更多的虚拟内存，其结果是使得使用大量虚拟内存的应用程序(如Oracle)的缺页率更低。
Increasing the size of this buffer allows the system to map more virtual memory, which results in a lower miss rate for applications that use a lot of virtual memory like Oracle.
swapon(它的同类swapoff)用于开启文件系统/设备上的交换分区，显示目前使用交换区的状态。
swapon (and its sister swapoff) is used to start swap on files/devices, and display status of currently used swap areas.
例如，如果您最信任的系统在一个专用的隔离的网络上运行，那么使用telnet在这个网络区中进行远程访问(或从控制台工作)是非常合适的。
For example, if your most trusted systems run on a dedicated and segregated network, it makes perfect sense to use Telnet for remote access within that very network zone (or working from the console).
该映像不仅包含Linux内核和根文件系统，而且还包含典型的供 GRUB 和LILO 使用的引导区。
The image contains not only the Linux kernel and root file system but also the typical boot sector used by GRUB and LILO.
当不使用时，市容us B反病毒2013最小化到系统托盘区。
When not in use, TownScape USB Anti-Virus 2013 minimizes to the system tray area.
然而，可用内存统计可能是不可靠的，因为操作系统使用了很多动态缓冲区和缓存。
However, the free memory statistic is likely to be unreliable since the OS USES a lot of dynamic buffers and caches.
使用直接缓冲区和非直接缓冲区直接的性能权衡可能随着JVM，操作系统和代码设计变化很大。
The performance tradeoffs of using direct versus non direct buffers can vary widely by JVM, operating system, and code design.
使用编程方法生成主引导区启动代码，达到自动引导多个操作系统的目的。
Using programming method to produce master boot record code in order to boot multiple operating systems.
让使用者以巡览档案系统的方式巡览资料存放区像是登录和凭证存放区的功能。
Features that enable users to navigate data stores, like the registry and certificate stores, as if they were a file system.
方法：使用立体定向治疗计划系统、靶点模拟器、头部定位框架检查各个治疗阶段靶区定位的误差。
METHODS: The stereotactic radiotherapy treatment planning system (SRT TPS), target simulator and head frame were used to check the errors of target localization during each radiation procedure.
通过使用提供程序模型，可轻松改写成员资格系统以使用不同的数据存储区或带有不同架构的数据存储区。
By using a provider model, you can easily adapt the membership system to use different data stores or data stores with different schemas.
无碰撞区跳频通信系统的跳频器所使用的跳频码是无碰撞区跳频码，该码在零位移附近一段区域内汉明相关值为零。
The No-Hit-Zone (NHZ) hopping code is employed by the frequency hopper of NHZ FH communication systems, which have no hits at all within a predefined correlation zone in the vicinity of zero shift.
实际上它是指，邮政区编号推广到一个邮政区系统的表现形式，于1943年开始在大城市里使用。
It refers to the fact that ZIP codes were an expansion on a system of postal zones that were used in larger cities starting in 1943.
实际上它是指，邮政区编号推广到一个邮政区系统的表现形式，于1943年开始在大城市里使用。
It refers to the fact that ZIP codes were an expansion on a system of postal zones that were used in larger cities starting in 1943.
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