• 优化IBMDB2数据库缓冲

    Tuning IBM DB2 database buffer pools

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  • 另一个极大影响性能配置参数数据库缓冲大小

    Another configuration parameter that dramatically affects performance is the database buffer pool size.

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  • 所有数据库缓冲大小设置AUTOMATIC

    Set the size of all database buffer pools to AUTOMATIC.

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  • 数据库缓冲通常数据库共享内存最大一块内存。

    The database buffer pool(s) area is normally the largest component of the database shared memory.

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  • 用户数量视图大小数量,以及数据库数量都会影响到设置缓冲规格方式

    The number of users, size and number of views, and number of databases all affect how you should set the buffer pool specification.

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  • 每个数据库至少需要一个缓冲

    Each database requires at least one buffer pool.

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  • 数据库记录内存缓冲区域里被读取更新

    Database records are read and updated in the buffer pool area of memory.

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  • 设计缓冲时,您应该考虑数据库内存需求

    When you design buffer pools, you should consider the database memory requirements.

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  • 每一个DB 2数据库必须至少拥有缓冲

    Each DB2 database must have at least one single buffer pool.

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  • 使得可以选择需要任何页面大小并且在整个数据库仍然维护缓冲统一的页面大小。

    This gives you the ability to choose any page size you want, and still maintain a single buffer pool and uniform page size across the database.

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  • 缓冲用途为了提高数据库系统性能

    The purpose of the buffer pool is to improve database system performance.

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  • 用于数据库分区缓冲表空间布局

    This is the layout for database partition groups, buffer pools and tablespaces.

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  • 除了缓冲排序影响数据库性能另一重要因素

    Besides the buffer pool, sort is another significant factor that impacts the database performance.

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  • 缓冲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.

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  • 但是记住缓冲数据库共享内存集中一部分

    However, keep in mind that buffer pools are part of the database Shared memory set.

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  • 如果数据库没有启动那么不能连接数据库,也就不能更改缓冲大小

    If the database is not started, you cannot connect to the database and change the buffer pool sizes.

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  • 而所有缓冲数据库激活时被分配的。

    All buffer pools are allocated when the database is activated.

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  • 意味着DB 2无法启动数据库因为数据库至少必须缓冲

    That means DB2 cannot start the database, because a database must have at least one buffer pool.

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  • 例如如果8KB页面大小创建一个新的数据库,那么所有空间默认缓冲8 KB。

    For example, if you create a new database with an 8 KB page size, the default buffer pool for all the table Spaces will be 8 KB.

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  • 下图演示小型数据库并发性上升时,缓冲大小产生影响。

    The figures that follow show the effect of buffer pool size when the amount of concurrency was increased with smaller databases.

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  • 预定义ROT功能组织缓冲数据库空间SQL活动集群中

    The predefined ROT functions are organized in a buffer pool, database, table space and SQL activity cluster.

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  • 显然随着数据库服务器物理内存使用,缓冲命中率对于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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  • 为了确定数据库中的缓冲大小查看清单3

    To determine the buffer pool size in the database, take a look at Listing 3.

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  • 这时应该连接数据库减少缓冲大小

    When this happens, you should connect to the database and reduce the size of the main buffer pools.

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  • 此外每一个数据库拥有自己数据库配置文件目录日志保留缓冲区域空间

    In addition, each database has its own database configuration file, catalog tables, logs, reserved buffer pool area, and table Spaces.

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  • 创建DB 2数据库缓冲空间,使用大于4k的页面大小。

    Create DB2 database, buffer pool, and tablespace with more than 4k.

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  • 尝试减少这两个数据库缓冲大小

    Attempt to reduce buffer pool sizes for both databases. Or.

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  • 生成缓冲空间数据库分区信息

    Generate buffer pool, tablespace, and database partition group information.

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  • 确定数据库缓冲大小是否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.

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  • 对于DB 2Version8更高版本,可以在不关闭数据库的情况下更改缓冲大小

    With DB2 Version 8 and higher, you can change buffer pool sizes without shutting down the database.

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