With the buffer pool size of 250 pages, the application test run experienced very poor buffer pool hit ratio of 48.69%.
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。
In general, it's desirable and recommended to have a high data hit ratio (80% or higher) and to have very high index hit ratio (90% or higher).
通常，推荐一个较高的数据命中率(80%或更高)和一个相当高的索引命中率(90%或更高)，这也是最理想的。
Suppose they had to hit JPMorgan's equity tier-one ratio of 6.4%.
应该必须达到摩根大通的6.4%的一级股本率水平。
Ideally this ratio should be over 95%, and as close to 100% as possible. To increase the buffer pool hit ration, try the following.
理想情况下，该比率应当超过95%，并尽可能接近100%。
Package and catalog caches, and workspaces (for example, package cache hit ratio)
包与目录缓存，以及工作空间（如包高速缓冲区命中率）。
Use one buffer pool, but increase its size until the index hit ratio stops increasing.
使用一个缓冲池，但是增加其大小直至索引命中率停止增长。
Obviously, with availability of physical memory on the database server, a high buffer pool hit ratio is always better for your database performance.
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。
If necessary, you can separate data and index into two different buffer pools to help ensure a good index buffer pool hit ratio.
如果必要，可以将数据和索引分隔到两个不同的缓冲池中，以帮助确保一个良好的索引缓冲池命中率。
If your system has a low buffer pool hit ratio, you can increase the buffer pool size further to achieve better application performance result.
如果您的系统具有较低的缓冲池命中率，您就可以通过增加缓冲池大小来进一步地取得更好的应用程序性能结果。
A well-tuned system can easily have a hit ratio well above 90%.
一个良好调优的系统可以轻松实现远高于90%的命中率。
Figure 3 shows the hit ratio highlighted in red, which indicates a performance problem.
图3用红色高亮显示了命中率，这表示存在性能问题。
You can use the snapshot report to derive information such as the buffer pool hit ratio, amount of sort heap overflows, and the system workload.
您可以使用快照来获得诸如缓冲池命中率、排序堆溢出的次数以及系统工作负载之类的信息。
Check that the cache size is sufficiently large and that the cache hit ratio is high for each of the dynamic SQL statements being executed.
对于每个被执行的动态sql语句，请检查高速缓存是否足够大且高速缓存的命中率是否较高。
Problem queries: These queries return only rows that exceed thresholds for important performance counters, for example, rows with buffer pool hit ratio lower than 90%.
问题查询：这些查询只返回超过重要性能计数器阈值的行，例如缓冲池命中率不到90%的行。
The buffer pool hit ratio is now showing excellent results.
现在的缓冲池命中率就显示了较好的结果。
In general, a buffer pool hit ratio above 80% is considered good.
一般情况下，缓冲池命中率在80%以上就认为是良好的。
When multiple buffer pools are in use, the buffer pool snapshot data can be used to calculate the buffer pool hit ratio of each pool to indicate the effectiveness of each buffer pool.
当多个缓冲池同时在用时，缓冲池快照数据可用于计算每个缓冲池的命中率，来表示每个缓冲池的有效性。
As a result, compression allows more data to be in memory than without compression, which increases the buffer-pool hit ratio and makes higher utilization of the available memory.
因此，相比不压缩，压缩能让内存存储更多的数据，进而提高了缓冲池命中率和可用内存的利用率。
If the hit ratio is low, increasing the number of buffer pool pages may improve performance.
如果命中率较低，则可以增加缓冲池页数来提高性能。
The above example shows a good buffer pool hit ratio of 98.4%.
以上示例显示了98.4%的良好缓冲池命中率。
Pay close attention to your overall buffer pool hit ratio.
密切关注您的总体缓冲池命中率。
The fewer pages would mean that the TLB process would have a higher hit ratio and therefore improved performance.
页数越少，意味着TLB进程将具有更高的命中率，因而性能更好。
A desirable goal for your buffer pool hit ratio is 80% or higher for data, and 90% or higher for index.
您的缓冲池命中率的理想目标是数据80%或更高，索引90%或更高。
The effectiveness of the cache is directly proportional to the hit ratio, which is the percentage of requests satisfied by having the item in the cache.
缓存的有效性与命中率成正比关系，命中率是缓存中的项能满足请求的比例。
If you use multiple buffer pools, you might take the buffer pool hit ratio together with the buffer pool name from the PWH.BUFFERPOOL table.
若使用多个缓冲池，可能要从PWH . BUFFERpool表取得缓冲池命中率和缓冲池名称。
The hit ratio is a function of the cache size, the amount of underlying data, and the data access pattern.
命中率与缓存大小、底层数据的数量和数据访问模式有关。
The query returns only the buffer pools that have a lower hit ratio than 90%.
该查询只返回命中率低于90%的缓冲池。
Lower bounded indicators are identified as unhealthy as they decrease in value (for example, the cache hit ratio indicator).
当设有下界的指示器(例如，缓存命中率指示器)的值降低时，它将标识为不健康。
For example, you can define a threshold alert to be triggered if your Buffer Pool Hit ratio drops to below 60% for a warning level or 55% for a problem level.
例如，您可以定义当BufferPoolHit ratio下降到低于60%时触发一个警告级阈值提醒，或者低于55%时触发一个问题级阈值提醒。
In addition the Dynamic Query Mode contains a fine grained metadata and cell data cache which is trickle fed and a higher cache hit ratio than was previously possible.
此外，DynamicQueryMode包含一个细粒度元数据和单元数据缓存(即一个trickle fed)以及一个比以前更高的缓存命中率。
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