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。
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%.
您可以对特定的阈值计数器设置过滤器。
定期异常处理提醒（阈值提醒），基于操作系统和DB2性能计数器。
Periodic exception processing alerts (threshold alerts), which are based on operating system and DB2 performance counters
虽然我认为可以将编译器部署为AOT（ahead-of-time）编译器，但它其实并不会盲目地编译所有东西，只有当方法执行计数器超过某个阈值时它才会生效。
The compiler doesn't blindly compile everything though I think it can be deployed as an ahead-of-time (AOT) compiler. It kicks in whenever method execution counters trip over some threshold.
TomEnebo补充道“JIT阈值只是一个方法调用计数器。”
Tom Enebo adds that "the JIT threshold is just a method invocation counter."
如果您还不熟悉DB 2，或者您不确定将什么定义为计数器的警告和问题级别，或者甚至不知道应该查看什么计数器，您可以使用一个预定义的阈值模板。
If you are new to DB2 or you are not sure what to define as warning and problem levels for counters or even what counters you should be looking at, use one of the predefined threshold templates.
一些DBA喜欢设置通用阈值集，或者对他们对计数器设置的限定符加以限制，因为他们对多个DB2实例使用同一个阈值集。
Some DBAs prefer to keep their threshold sets generic or to limit the qualifiers they place on the counters because they use the same threshold set for multiple DB2 instances.
定期警报处理或阈值警报-基于您为许多操作系统和db2计数器、指标和比率定义的阈值的用户定义警报。
Periodic alert processing or threshold alerts - user-defined alerts that are based on thresholds that you define for many of the operating system and DB2 counters, metrics, and ratios.
阈值在一个阈值集中定义，它是一个定期异常(Periodic Exceptions)性能计数器列表。
The thresholds are defined in a threshold set, which is a list of Periodic Exceptions performance counters.
同样还定义了每个架构事件计数器的阈值计数。
A threshold count for each architecture event counter is also defined.
又从研究该算法的过程中，发现其局限性，即计数器值对时间片过于敏感的问题，于是进一步采用设置阈值进行区分的方法来优化。
During the research, the limitation was found that the counters are sensitive to the time chip. The paper USES threshold values to optimize the algorithm.
又从研究该算法的过程中，发现其局限性，即计数器值对时间片过于敏感的问题，于是进一步采用设置阈值进行区分的方法来优化。
During the research, the limitation was found that the counters are sensitive to the time chip. The paper USES threshold values to optimize the algorithm.
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