系统默认值取决于列的类型。
系统默认值压缩特性需要对每个列单独启用。
The system default compression feature needs to be enabled per column.
按照这种格式，很容易看出哪些属性有系统默认值。
In this format, it is much easier to see what system defaults one has implemented.
对于字符数据，系统默认值为一个空字符串。
使用系统默认值压缩能否节省空间取决于表列中的数据。
Whether or not space can be saved by using system default compression depends on the data in the table columns.
必要时，可以使用下面清单14中的sql语句禁用系统默认值压缩。
If required, you can disable system default compression again by using an SQL statement, as in Listing 14 below.
该特性弥补了已有的列级压缩、系统默认值压缩和值压缩选项。
This feature complemented the existing column level compression, system default value compression, and value compression options.
该脚本检查分布统计信息，以发现作为出现最频繁的值之一的系统默认值。
The script checks the distribution statistics to find the system default as one of the most frequent values.
可以在每个远程主机上运行此脚本，然后通过对比系统默认值检查主机之间是否有差异。
The script could be run on each remote host, and the system defaults can be compared to see if there are discrepancies between hosts.
数值压缩不为空值、可变长度列中的零长度数据和系统默认值提供磁盘空间。
Enabling value compression allows for no disk storage to be consumed by NULL values, zero length data in variable length columns and system default values.
如果系统默认值是出现最频繁的值，那么对系统默认值的压缩将出现良好的效果。
If the system default is part of the most frequent values, compression of the system default will show good results.
您可能已经注意到，计算值压缩实际节省下来的空间和附带节省下来的空间并不容易，因为有系统默认值压缩的存在。
As you may have noticed, it's not easy to calculate the real benefit of value compression and the additional savings due to system default compression.
当使用列属性SYSTEMDEFAULTCOMPRESSION 时，如果列中包含很多的系统默认值，则可以节省更多的空间。
With the column attribute SYSTEM DEFAULT COMPRESSION, additional space can be saved if columns contain the system default very often.
任何没有指定的端口将使用它们的默认值，其在当前的安装中将是唯一的，但是不保证在相同主机系统的不同安装之间也是唯一的。
Any ports not specified will take their default values, which will be unique across the current installation, but are not guaranteed to be unique across multiple installations on the same host system.
大多数联邦系统用户不需要调优这三个选项，因为默认值已经相当好了。
Most federated system users do not need to tune these three options, as the default values perform relatively well.
DBSA能够将用户映射到当前操作系统用户，或者DBSA能够将用户映射到属性的默认值。
A DBSA can map a user to an existing operating systems user, or the DBSA can map the user to a default set of properties.
字段中的默认值很可能是通过使用upc符号作为键值从一个数据库或运营系统中检索到的。
The default values in the field would most likely be retrieved from a database or operational system, using the UPC symbol as the key value.
如果您使用默认值创建数据库，那么所使用的代码页就来自于操作系统的信息。
If you create the database using the default values, the code page that is used is taken from the operating system's information.
在出现的窗口中，为源数据库系统输入正确的信息，包括端口号(默认值为50000)、实例名称等等。
In the window that comes up, enter the appropriate information for the source database system, including port number - the default is 50000 - instance name, and so on.
已定义的阶段有产品化、开发、单元测试、系统测试及产品化扩展阶段，并将产品化扩展作为默认值。
Defined stages are production, development, unit test, system test and extension with production as the default value.
用默认值(events4 . nsf)启用所有操作系统和消息。
All operating system and messages with default values (events4.nsf) are enabled.
usermapping：默认值为OFF，它意味着只有有操作系统帐户的用户能够连接到Informix。
USERMAPPING: The default value is OFF, which means only users having operating system accounts can connect to Informix.
在Windows操作系统上，如果未指定该参数，则将使用当前的实例作为默认值。
On Windows operating systems, if this parameter is not specified, the current instance will be used as the default value.
TcpTimedWaitDelay参数控制操作系统在应用程序关闭TCP连接之后等待端口回收的时间，默认值是四分钟。
The TcpTimedWaitDelay parameter, which controls the amount of time the operating system waits to reclaim a port after an application closes a TCP connection, has a default value of four minutes.
启用或禁用系统托盘应用，默认值是true。
Enables or disables the system tray application. The default value is true.
如果您在创建数据库时使用默认值，则会创建下列系统管理的表空间。
If you use the defaults when creating a database, the following system-managed tablespaces are created.
可以使用grep工具在文件中搜索系统用户属性默认值。
You can use the grep utility to search the system user attribute defaults in the file. Depending on the placement of comments in the file, one of the following will extract just the default stanza
在创建虚拟系统时给出的映射必须为任何缺失的属性和参数提供值，并能另外提供值以覆盖默认值。
The map supplied when creating a virtual system must provide values for any missing properties and parameters, and can additionally supply values to override the default values.
注意，如果调用者未将日志级别提供给printk，那么系统就会使用默认值kern_warning(表示只有KERN_WARNING级别以上的日志消息会被记录。)
Note that if a caller does not provide a log level within printk, a default of KERN_WARNING is automatically used (meaning that only log messages of KERN_WARNING and higher priority will be logged).
注意，如果调用者未将日志级别提供给printk，那么系统就会使用默认值kern_warning(表示只有KERN_WARNING级别以上的日志消息会被记录。)
Note that if a caller does not provide a log level within printk, a default of KERN_WARNING is automatically used (meaning that only log messages of KERN_WARNING and higher priority will be logged).
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