如果调零没有成功的话，那就需要检查以下监护仪、电缆连线等是不是正常的。
If zero is not successful, then it would need to check the following monitors, cables, connections, etc. is not normal.
可以使用一种偷懒的方法来尝试对observer . update方法的回调；如果调用失败，这说明该方法不存在。
The lazy way would be to try the callback to observer.update ; if the call fails, this suggests that the method does not exist.
如果你必须在外出时听一些东西，只使用一个耳机或把音量调小。
If you have to listen to something when you're out, use only one earphone or play it at a very low volume.
在极少数情况下，如果SQL很少执行或只寻址很少几行，那么调优效果不会明显。
In these rare situations, the results will not be noticeable if the SQL is executed infrequently and addresses very few rows.
如果正在使用回调函数来请求对数据进行加密使用的密码，最好是以某种方式请求两次，这样可以多一次机会接收用户的输入。
If the callback is being used to request a password for encrypting data, it is preferable to ask for the password twice, in some fashion, to catch any typos.
压缩阶段可能会极大地增加GC暂停时间，因此，如果压缩阶段经常出现，那么调优堆设置就能改进应用程序性能。
Compaction phases tend to significantly increase GC pause times, so if they are a regular occurrence tuning the heap Settings can improve the application performance.
如果你没有，就应该利用价格回调之际买上一些。
If you haven't, you should use the pull-back in price to get some.
如果您稍后决定重新应用所有配置，而不是调优多个步骤，您可以再次启用这个步骤，并禁用或删除步骤2 - 6。
If you decide later to return to simply applying all of the configuration, not fine-tuning with several steps, you can enable that step again and disable or remove steps 2-6.
如果需要实现一个回调函数，只需添加一个方法并通过注释将其声明为回调函数即可。
If you need to implement one of those callbacks, you can simply add a method and annotate it to declare that it's a callback.
如果可能，专门调优服务器，使其具有NFS服务器的功能(稍后详细说明)。
If possible, tune the server specifically to function as an NFS server (more about that later).
一个看不到月亮的夜晚，我们在太平洋上空执行一次常规训练。我当时突发奇想：如果把舱内灯光调暗的话，夜空会是什么样呢？
One moonless night, while flying a routine training mission over the Pacific, I wondered what the sky would look like from 84,000 feet if the cockpit lighting were dark.
需要注意的是，如果请求需要进行回调，那么这些控件的值是不能够在viewstate中被缓存的。
It is important to note that if the request is a postback, the values of the controls have not yet been restored from view state.
如果提供了回调函数，那么XHR对象的send方法立即返回，并不等待服务器响应。
If a callback function was provided, the send method of the XHR object returns immediately without waiting for a server response.
回调函数(如果不需要回调，就是null)。
不过，如果您想自己配置和调优这些特性，那么DB2也允许禁用缺省的自动特性。
However, if you prefer to configure and tune these features yourselves, DB2 provides the option to disable default automation.
在大多数情况下，如果您只想调优所需要的参数，那么这是完全有可能的。
In most situations, this is perfectly possible if all you want to do is fine-tune the expected parameters.
但是，如果不在该回调中编写要做某事的代码，则代码或应用程序客户机将得不到任何报告。
But if you don't write code to do something in that callback, nothing will get reported to your code or to the application client.
《今夜无人入眠》，被成千上万的人认为是一首绝美的咏叹调。但是如果你要他们唱出来他们却不能。
Nessun Dorma, a deliriously beautiful aria, is known by millions of people, but if you ask them to sing it, they can't.
如果对象池大小没有正确调优，许多未使用的对象实例最终会被闲置，耗尽内存而不产生任何价值。
If the pool size is not tuned correctly, many unused object instances can end up hanging around, using up memory without contributing value.
如果就绪状态为4，我们不仅要运行回调函数中的代码，而且还要在每次调用回调函数时都输出就绪状态。
Instead of only running code in your callback if the ready state is 4, just output the ready state every time that your callback is called.
如果令牌不匹配的话，v8会调用回调函数来判断这个访问是否应该被允许。
If the tokens do not match V8 performs a callback to check if access should be allowed.
如果应用了所有标准的调优技术之后，仍然得不到期望的结果，那么可以考虑这两个特性。
These features can be considered after application of all standard tuning techniques but have not produced the desired result.
如果注册了一个路径，它就使用定义的回调函数来生成要显示的内容。
If a path is registered, it USES the defined function as a callback to produce the content presented.
如果全球股市已被高估，应该出现回调，那么投资者开始抛售就不需要一个好理由，一个普通的理由即可。
If global equities are overvalued and due a correction, investors do not need a good reason to start selling, just a popular one.
记录GC使用情况并不具有干扰性，因此如果需要分析内存问题或者调优垃圾收集器，在生产环境中默认启用gc日志是值得的。
Logging GC usage is not intrusive, and so it is reasonable to enable GC logging in production by default in the event you ever need to analyze memory problems or tune the garbage collector.
如果回调之间存在复杂的交互，请查找并消除冗余代码。
If there is a complex interaction between callbacks, look for redundant codes and simplify them.
回调中所抛出的异常如果没有被全局处理器处理或捕获，那么他们会终止应用，并不会给出任何关于问题的提示信息。
Exceptions raised in callbacks that were not properly handled or caught by a global handler would silently terminate the application, without any indication of the problem.
如果收到的回调表明处理WS1消息时出错，聚合应用程序也可能终止调用。
When a received callback indicates errors processing the WS1 message, the converged application may also tear down the call.
如果使用持久化事件或活动，一定要记得调优mq队列管理器来优化日志。
If you're using persistent events or actions, it's important to tune the MQ queue manager to optimise logging.
此外，如果您向服务请求JSON数据，还可指定回调函数。
Moreover, you can also specify a callback function if you request JSON data from the service.
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