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graphs:Young GC Logs:Full GC LOG:GC Analysis ToolsGchistoGchisto is a professional analysis of GC log tool, can be analyzed by GC log: Minor GC, full GC time, frequency, etc., through the list, reports, charts and other forms to respond to GC situation. Although the interface is slightly rough, but the function is good.Once you have configured your local JDK env
Took a little time to tidy up the work of the next Monkeyrunner schematic diagram, please cooperate with my blog inside monkeyrunner Other source analysis articles for reading. The following list is organized into the corresponding series to facilitate reading:
Monkeyrunner Source Analysis-who moved me?
Mo
Author: gzshun. Original Works. Reprinted, please indicate the source!Source: http://blog.csdn.net/gzshun
This series mainly follows the android SD card mounting process, from vold to framework, and then from framework to UI. Familiar with C/C ++ written by GoogleSource codeTo improve the design andCodeThanks to Google for providing Android, an open-source mobile phone operating system, which gives you the opportunity to understand the implementatio
the B-tree principle, as well as the b-tree operation of the various functions of the simple introduction, about B-tree storage subdb,subpage,overflowpage, etc. is not carefully enough, If you have time, you will be in a subsequent post to open a detailed description of the above abnormal key-value data storage and operation mode. The B-tree in Lmdb is B+-tree, and all leaf nodes are at the same level. This article is a lot of shortcomings, welcome t
After understanding the system goal, the system analyst should first not understand the business details, but discover people and things related to this goal. This kind of person and thing is called stakeholder in English. In Rose, the type of this kind of model is defined as business actor. Some documents are translated into stakeholders, so I prefer the translation method of stakeholders. This introduces the first step of Business Modeling: discovering and defining stakeholders.
Starting from
This article mainly introduces other related documents of the Jquery1.9.1 source code analysis series (15th) animation processing. For more information, see
A. animation compatibility with Tween. propHooks
Tween. propHooks provides methods to set and obtain css feature values in special cases. The structure is as follows:
Tween.propHooks = { _default: { get: function(){...}, set: function(){...} }
Java concurrency series [2] ---- exclusive mode of AbstractQueuedSynchronizer source code analysis,
In the previous article "Java concurrency series [1] ---- brief analysis of AbstractQueuedSynchronizer source code analysis", we introduced some basic concepts of AbstractQueu
Webshell series (5)-Analysis of webshell's "visibility" capability
1. Typical attack sequence diagram of webshellIt is a typical webshell attack sequence diagram. It uses web vulnerabilities to obtain web permissions, upload pony, install Trojan, remotely call webshell, and execute various commands, to obtain data and other malicious purposes.2. Analyze the "visibility" capability of each stage from the kil
. Make: Online a child's shoes deduced the formula is::(xmx-xmn) * (100-cmsinitiatingoccupancyfraction)/100>=xmn This formula is not very strict, in the memory of small time will affect the calculation of Xmn. For the GC parameter configuration of the actual environment see: example analysis monitoring tools see JVM Monitoring Reference: JAVA HOTSPOT VM (http://www.helloying.com/blog/archives/164) S
Java concurrent series of AbstractQueuedSynchronizer source code analysis (exclusive mode ),
In the previous article "Java concurrency series [1] ---- brief analysis of AbstractQueuedSynchronizer source code analysis", we introduced some basic concepts of AbstractQueuedSynch
Long time no pen, during this period thanks to many friends like and encouragement, do not write something will be sorry for these friends.
What do you write? In the original scenario, you should start writing about how to translate from a business use case to a conceptual use case and a system use case, but to be honest, this step requires a majority of experience, and it's hard to find a universal step. Let's put it aside for a while, and it will b
using xposed hook, as well as the solution, in speaking of the case to rob red envelopes The solution is very simple, is to seize the time to judge, but this is not hundred percent accurate, Because there are a lot of uncertainties in the inside, such as the speed of the network, may determine a red envelope was robbed of time. But in a certain time to grab the
Tags: ONS memory targe SDN title Technology comm decision Spark SQLFrom the decision to write spark SQL source analysis of the article, to now one months of time, the land continues almost finished, here also do a integration and index, convenient for everyone to read, here give reading order:) First Article The core process of Spark SQL source analysis Second
R Language Data Analysis series three --by Comaple.zhangLast time we talked about vectors, this matrix,array,dataframe,ts.Data structure matrix matricesThe matrix in the R language is understood to be composed of two and more than two vectors.Matrix creationCreate from Vector> x[1] 14 43 89 3 96 58 61 75 33 66 24 54 45 15 6 44> M > M[16,] 44We see now is the 16*
utilization on old, Eden, S0, and S1, showing the distribution and release of each part of the space. It maintains a continuous refresh at the specified refresh rate.The picture above shows the normal running program, which is clearly displayed in the chart when there is a memory leak or abnormal behavior. At least we can understand that he is related to object memory allocation and garbage collection. Then, with the help of Other tab pages (like "Threads") and thread dump, we can reduce the pr
ah.For this speculation, the customer still wants to know more details, well, let's take a look at the ash situation:Before migration"In Hard parse" ==> 15 line "in Hard parse" ratio: 37.5%2018/03/12 15:26:36---> 2018/03/12 15:37:25.693000000Sql_id:30 AAfter migration"In Hard parse" ==> 252 line "in Hard parse" ratio: 76.6%2018/03/20 11:33:50---> 2018/03/20 12:25:58.591000000sql_id:292 AThe overall time after the migration has not only been significa
The comments from my friends in the previous article gave me a lot of motivation to write this {Tagshow (Event)} "> Series of articles, it seems that everyone is more concerned about this series. In the first half of this article, I will explain the overall structure of blogengine. net {Tagshow (Event)} "> Architecture, the second half is mainly for the analysis
There are fewer tutorials on iOS performance tuning, and the decision to write an iOS performance Tuning series focuses on several aspects of memory leaks, performance optimization, traffic, and power analysis.Xcode has provided a very powerful performance tuning tool, combined with several third-party tools and some techniques, to optimize performance very simply.The first writing is the simplest, analyze static analysis.When iOS developers build or
survivor area of space, again promoted to the old Gen area, The old Gen area also had insufficient memory to produce the promontion faild which led to the full GC. It can be inferred that promontion faild does not occur when the remaining memory is Eden+from survivor (XMX-XMN) * (1-cmsinitiatingoccupancyfraction/100) >= (xmn-xmn/(survivorratior+2)) and infer:Cmsinitiatingoccupancyfraction For example:When xmx=128 xmn=36 survivorratior=1 cmsinitiatingoccupancyfractionWhen xmx=128 xmn=24 survivor
This is the first article in the agile development user story series. (Topic directory)
It is often asked whether there are complete user stories. I have searched for about two or three articles on the Internet, but most of them are just to describe the syntax of user stories, it does not involve the granularity of user stories or the organizational structure of a large number of stories.
We wanted to use our Martian as a case study, but we were never
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