数据服务器层是数据网格的组成部分,通过在内存中缓存对象来缓冲数据库访问,以实现更高的性能。
Data Server tier, part of data Grid, buffers database access by caching objects in-memory for higher performance.
每个数据库都至少需要一个缓冲池。
当您设计缓冲池时,您应该考虑数据库的内存需求。
When you design buffer pools, you should consider the database memory requirements.
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.
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.
这是用于数据库分区组、缓冲池和表空间的布局。
This is the layout for database partition groups, buffer pools and tablespaces.
除了缓冲池,排序是影响数据库性能的另一重要因素。
Besides the buffer pool, sort is another significant factor that impacts the database performance.
缓冲池竞争可以成为数据库性能中的重要因素。
Buffer pool contention can be a significant factor in database performance.
一个缓冲池是与单个数据库相关联的,可以被多个表空间使用。
A buffer pool is associated with a single database, and can be used by more than one table space.
但是请记住,缓冲池是数据库共享内存集中的一部分。
However, keep in mind that buffer pools are part of the database Shared memory set.
缺省情况下,应用程序使用缓冲池IBMDEFAULTBP,它是在创建数据库时创建的。
By default, applications use the buffer pool called IBMDEFAULTBP, which is created when the database is created.
而所有的缓冲池是在数据库被激活时被分配的。
All buffer pools are allocated when the database is activated.
预定义的ROT功能组织在缓冲池、数据库、表空间和SQL活动集群中。
The predefined ROT functions are organized in a buffer pool, database, table space and SQL activity cluster.
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.
创建DB 2数据库、缓冲池和表空间,使用大于4k的页面大小。
Create DB2 database, buffer pool, and tablespace with more than 4k.
尝试减少这两个数据库的缓冲池大小。
将所有数据库缓冲池的大小设置为AUTOMATIC。
生成缓冲池、表空间和数据库分区组信息。
Generate buffer pool, tablespace, and database partition group information.
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.
加载驱动程序将使用连接器中的数据并构建 64k缓冲以便发送给Teradata数据库。
The load driver will use the data from the connector and build 64k buffer to be sent to the Teradata database.
当NPAGES的值为-1时,缓冲池大小就是由数据库配置中的BUFFPAGE参数确定的。
When NPAGES has value of -1, the buffer pool size is determined by the BUFFPAGE parameter in the database configuration. For example.
优化IBMDB2数据库缓冲池
特别是,要避免没有缓冲的、生命期短的数据库连接。
Specifically, avoid non-pooled short-lived database connections.
当创建表空间时,可以将它与特定的缓冲区池(数据库缓存)关联起来,并关联到特定的容器。
When you create a table space, you can associate it with a specific buffer pool (database cache) as well as to specific containers.
如果数据库没有启动,那么就不能连接到数据库,也就不能更改缓冲池的大小。
If the database is not started, you cannot connect to the database and change the buffer pool sizes.
这意味着DB 2无法启动数据库,因为一个数据库至少必须有一个缓冲池。
That means DB2 cannot start the database, because a database must have at least one buffer pool.
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.
与其他内存缓冲区相比,缓冲池对数据库性能的影响最为显著。
Compared to other memory buffers, buffer pools have the most significant impact on database performance.
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.
显然,随着数据库服务器上物理内存的使用,高缓冲池命中率对于您的数据库性能而言始终比较好。
Obviously, with availability of physical memory on the database server, a high buffer pool hit ratio is always better for your database performance.
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