使用指定缓冲大小创建输出流。
程序员可以指定缓冲大小——想缓冲的channel发送消息不会阻塞，除非缓冲已满，同样从缓冲的channel读取也不会阻塞，除非缓冲是空的。
A programmer can specify a buffer size - sending to a buffered channel will not block unless the buffer is full, and reading from a buffered channel will not block unless the buffer is empty.
这使得更新和报告缓冲池大小以及其它DB 2数据库配置参数变得更加方便。
This makes it easier to update and report the buffer pool size along with other DB2 database configuration parameters.
要解决这个问题，可以减少主缓冲池的大小。
To resolve this problem, reduce the size of main buffer pools.
另一个极大影响性能的配置参数是数据库缓冲池大小。
Another configuration parameter that dramatically affects performance is the database buffer pool size.
我们建议您不断增加缓冲池大小，直到看到不再有性能提高。
We recommend you keep increasing the buffer pool size until you see diminishing improvements.
应当根据取自测试环境的快照信息来决定缓冲池的大小。
The buffer pool sizes should be determined based on snapshot information taken from the test environment.
确保可以使用数据库配置中的BUFFPAGE参数来控制缓冲池大小之后，将该参数设置成合适的值。
After making sure that you can use the BUFFPAGE parameter in the database configuration to control the buffer pool size, set it to a proper value.
这些信息对您很重要，因为作为一名管理员，您要控制缓冲池大小规格和决定要指定的缓冲池大小。
This is important information for you, as an administrator, because you control the buffer pool size specification and you can decide what size to specify.
缓冲池大小的指定要取决于可用存储(包括中央存储和扩展存储)的容量。
The designation of buffer pool sizes is dependent upon the amount of storage (both central and expanded) that is available.
这在所需数据量小于内核缓冲区大小时极大地提高了性能。
This significantly improves performance when the requested data amount is less than the kernel buffer size.
如果缓冲池大小过大，那么内存使用会超过可用的物理内存，从而导致操作花费更多时间对内存进行分页。
If you set the buffer pool size too high, then system memory usage will exceed the available physical memory, causing the operating system to spend more time paging the memory.
但是，如果总的缓冲区大小太大，并且没有足够的存储器可用来分配给它们，那么将为每种页大小分配最少的缓冲池，性能就会急剧下降。
However, if the total buffer size is too large, and there is not enough storage to allocate them, a minimum system buffer pool for each page size is allocated, and performance is sharply reduced.
如果将缓冲区大小设置为 0，那么将发生同步写日志操作，而不使用审计缓冲区。
When the size of the buffer is set to 0, synchronous log writing occurs, and the audit buffer is not used.
这时，应该连接到数据库，并减少主缓冲池的大小。
When this happens, you should connect to the database and reduce the size of the main buffer pools.
收集选项包括打开或关闭跟踪；指定跟踪缓冲区大小；指定或更改跟踪选项；转储跟踪信息；以及清除跟踪缓冲区。
Collection options include turning a trace on or off; specifying the trace buffer size; specifying or changing trace options; dumping a trace; and clearing the trace buffer.
要利用增加的缓冲池，您必须重新绑定应用程序，以使优化器在决定其访问策略时考虑缓冲池大小。
To take advantage of the increased buffer pool, you must rebind the applications for the optimizer to consider the buffer pool size when deciding its access strategy.
这里，可能的动作是减小支持驻留在SSD上的表空间的缓冲池大小。
A potential course of action here is to reduce the size of the buffer pools supporting the table Spaces resident on SSDs.
前面已提到，ESTORE是用于扩展缓冲池的大小。
It is mentioned earlier that ESTORE is used to extend the size of a buffer pool.
通过250个页面的缓冲池大小，应用程序测试运行呈现了48.69%的糟糕的缓冲池命中率。
With the buffer pool size of 250 pages, the application test run experienced very poor buffer pool hit ratio of 48.69%.
尝试减少这两个数据库的缓冲池大小。
要确定数据库的缓冲池大小是否由BUFFPAGE参数所决定，请运行。
To determine whether the BUFFPAGE parameter is in use for buffer pool size of database, run.
您可以使用以下命令在创建后修改缓冲池大小。
You may use the following commands to alter the buffer pool sizes after you create them.
审计缓冲区大小(audit _ buf_sz)：该参数指定审计数据库时使用的缓冲区的大小。
Audit buffer size (audit_buf_sz) : This parameter specifies the size of the buffer used when auditing the database.
如果您的网络可靠，尝试将缓冲区大小从默认的8000提高到64000。
If your network is reliable, try increasing the buffer size from the default (8000) to 64000.
可以按字节或兆字节来指定缓冲区的大小。
缓冲区大小的选择将在很大程度上影响审计的性能，因为可能要将很多记录写到审计日志中。
The choice of buffer size can greatly affect performance when auditing is started since many records may be written to the audit log.
日志缓冲区大小是由LOGBUFSZ数据库参数定义的。
The log buffer size is defined by the LOGBUFSZ database parameter.
将日志缓冲区大小增加到256个页面或更大。
如果超过这个缓冲区大小，数据库服务器会丢弃保存的数据。
If this buffer size is exceeded, the database server discards saved data.
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