dynatrace appmon

beam %%找到参数 --setcookieOpen a new shell, use the same cookie, different nodename$ erl --setcookie cookiename -name [emailprotected]Enter the system with the start remote shellErlang R16B02 (erts-5.10.3) [source] [64-bit] [smp:2:2] [async-threads:10] [hipe] [kernel-poll:false]Eshell V5.10.3 (abort with ^G)([emailprotected])1> net_adm:ping(‘[emailprotected]‘).pong([emailprotected])2> nodes().[‘[emailprotected]‘]([emailprotected])3> User switch command --> h c [nn] - connect to job

@ localhost)28> gettableinfo = fun (item)-> mnesia: table_info (Dictionary, item) end. # Fun (A @ localhost)29> getfragnodes = fun ()-> mnesia: Activity (sync_dirty, gettableinfo, [frag_dist], mnesia_frag) end. # Fun Test: (A @ localhost)30> getfragnodes (). [{B @ localhost, 0}, {c @ localhost, 0}, {A @ localhost, 1}] Now you can add a shard. Through the node list returned by getfragnodes, mnesia can add the new Shard to a relatively idle node by load balancing: (A @ localhost)35

information, such as Appmon,webtool. However, the system memory is seriously insufficient, there is no way to start these tools, fortunately there are Erlang shell. The Erlang shell takes a lot of useful commands and can use the Help () method to view Copy Code code as follows: > Help (). Erlang system memory consumption Top results show a memory problem, so the first step is to look at the system memory consumption in Erlan

compressor to compress JavaScript files (in fact, today Nodejs tools are more useful) compressing JavaScript files on the server (GZIP encoded) cache JavaScript files by correctly setting HTTP response headers to avoid caching problems by adding timestamps to filenames Using CDN Iv. Post-release performance testing and problem tracking Use the Network analysis tool to find bottlenecks in loading scripts and other resources on the page. Lazy loading of scripts can s

important JS loading hour, which is the product policy accounting methodTotal download Shicheneme promised to calculate the onload hour, such as promised to account for the synchronization load of all the time-loaded resources. If there is a lot of asynchronous foil on the page, you can end the asynchronous foil as the total download hourIv. Functional Monitoring ToolsBecause the method and policy of aggregating data are different, the front-end Function monitoring is divided into two types, no

fastest. But this situation is often impossible, let alone easy to achieve.If you can not reduce the complexity of the algorithm, you can also find the key points in the algorithm and improve the method, to play a role in improving performance. Suppose we have the following algorithm:The overall time complexity of the algorithm is O (N3), and the complexity is O (N x O x P) if calculated in individual access order. But anyway, when we analyze this code, we find some strange scenarios:

lay out the table once the entire first row has been received. Cells in subsequent rows do not affect column widths. Any cell that has content that overflows uses the ‘overflow’ property to determine whether to clip the overflow content. Automatic layout, CSS 2.1 Specification This algorithm may be inefficient since it requires the user agent to have access to all the content in the table before determining the final layout and may demand more than one pass. Several tools and several articles

of JS, the entire page other places of the JS performance is also to be considered, such as the process of a single Ajax request, a front-end operation of the use of JS, and JS In addition to time performance will have CPU, memory consumption performance considerations, These dynatrace tools are available.In addition, during the whole process of downloading the external resources, we should try to avoid all kinds of request errors.Of course, in addit

As you know, jQuery selectors can be obtained in the following ways: 1. IDS such as $ (# ID); 2. tagnames such: $ (A); 3. Use ClassName For example: $ (. className); The above are several frequently used JQuery selectors. For jQuery usage optimization, let's take a look at jQuery selectors. As you know, jQuery selectors can be obtained in the following ways: 1. You can use the ID such as $ ("# ID "); 2. Use TagName such as: $ (""); 3. Use ClassName For example: $ (". ClassName "); The above are

Front-end performance monitoring system ShowSlow, monitoring system showslow Author: zhanhailiang Date:1. Introduction ShowSlow is an open-source front-end performance monitoring system that provides the following functions: Frontend performance indicator data collection function: ShowSlow native provides data collection toolsDOM Monster!However, it also supports reporting performance data to the server through third-party tools such as YSlow and PageSpeed (the server provides the data collect