1) OverviewHttps://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/60981d00-ca87-2910-fdb8-d4a2640d69d4Volume testing for SAP BW
ERP: Note 821148-installing/upgrading basis plug-in (pi_basis) 2005.1
Https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/4096b8fc-6be7-2a10-618e-b02a5e5e798fStep-by-Step: From the data model to the Bi application in the Web
2) ModelHttps://www.sdn.sap.
crashes, connection timeout, and memory leakage during use. As far as I know, tingyun is an SaaS-based service platform of the tone network. It provides an overall solution for the mobile App client-Network-Server. After the author's test, the mAPM design idea is very clear, and the SDK is only about 10 K, the advantage of similar products in foreign countries is also very obvious.
In addition to listening to the cloud, the following describes several foreign solutions that require a ladder, wh
3.4 Section Group attributes
Section group supports querying documents containing internal structures (such as html and xml documents). You can specify
You can limit the query range to the header. In html, xml, and other similar structures
In addition to the content to be displayed, there are also a large number of identifiers used to control the structure. These identifiers may not be indexed, this is a major function of section group (original article: In order to issue WITHIN queries on docum
use the local environment:
Make docker_command = build by using build (by default, the same docker-dev image of pull and the current version) Make specifies the local image through the pull method (no longer pull image) make docker_image = docker-Dev: v1.2Other compilation methods
Another method is to upload your code to GitHub.
Then on the https://registry.hub.docker.com, register, select your own GitHub project for automatic compilation.
This method is really slow and cannot be obtained withi
Today for the first time the file traversal, the time of their own recursive writing also debugging long, (mainly because of the problem of the separation of symbols), and later found the Os.walk method, can not help to share with you.First look at the code:Import OSFor I in Os.walk (' C: ' +os.sep+ ' ant '):Print I[1]Here is the output:C:\antC:\ant\binC:\ant\docsC:\ant\docs\ant2C:\ant\docs\antlibsC:\ant\
the document DOC1,DOC3,DOC5. After the index is built, the system will automatically generate
The following dr$myindex$i,dr$myindex$k,dr$myindex$r,dr$myindex$x,mytable5 tables (assuming the table is
MyTable, indexed as MYINDX). After the Dml operation, the context index is not automatically synchronized and needs to be exploited
Ctx_ddl.sync_index manually synchronize indexes.
Example:
Create table Docs (ID number primary key, text VARCHAR2 (200));
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:
character sets (ZHS16CGB231280 ZHS16GBK ZHT32EUC ZHT16BIG5 ZHT32TRIS ZHT16MSWIN950 ZHT16HKSCS UTF8 ). However, the word segmentation method is too simple. Each combination is used as a word, which occupies space and is inefficient.3) chinese_lexer: this is a new Chinese analyzer that only supports the utf8 character set. The biggest improvement of chinese_lexer is that it can recognize most of the commonly used Chinese words and therefore analyze sentences more efficiently.
Create sample dataCr
it can recognize most of the commonly used Chinese words and therefore analyze sentences more efficiently.
Create sample dataCreate table docs (id number, name varchar2 (200), address varchar2 (2000 ));Insert into docs values (1, 'John Smith ', 'room 403, No. 37, ShiFan Residential Quarter, BaoShan District ');Insert into docs values (2, 'noah Abelard ', 'room 2
= new String (Packet.getdata (), 0, Packet.getlength (), "UTF-8");
LOG.W (Localudpdatareciever.tag, "note" >>>>>> received the message from the service side: "+pfromserver);
}
}
}
"Run Effect"
Client Run Results:
Introduction to NIO Framework (i): Server-side based on Netty4 UDP two-way communication demo demo _qq20160615-3.png
Server-side Run results:
Introduction to NIO Framework (i): Server-side based on Netty4 UDP two-way communication demo demo _qq20160615-4.png
"Supplementary Note
development of application development, system architecture, application deployment, and so on, at this time, many enterprises began to gradually realize the importance of application performance management.
Especially in recent years, the popularity of mobile devices and the rise of new mobile access methods make every user's life more dependent on mobile applications. At this time, users are more demanding on performance experience. To solve this problem, Gartner proposed five dimensional mod
Web request.
APM can be used to:
The overall visualization of Web application performance;
Visualize the performance of specific Web requests;
Automatically send alarms when Web application performance becomes worse or multiple errors occur;
When the volume of business is large, the response of the application is validated.
An example is given here.
The following is not an exhaustive list of APM tools that support the out-of-the-box use of ASP. NET and IIS:
months to withdraw from the Chinese market, the layoffs are more hasty, Compuware in the Chinese market for 20 years efforts are wasted.The encyclopedia shows that Compuware1973 was founded in the United States Detroit in 1996, to enter the Chinese market, for enterprise distributed systems and large host environment to provide a wide range of IT services, including technical personnel configuration, application development, quality assurance, project management and application maintenance, 200
the following algorithm:
The overall time complexity of this algorithm is O (N3). If it is calculated separately, the complexity is O (N x O x P ). However, when analyzing this code, we may find some strange scenarios:
In the development environment, test data shows that the time complexity of the left branch (N-> M-> Heavy operation) is greater than that of the O and P on the right, so we only saw the left branch in our analyzer.
In the production environment, your maintenance team may f
library for Rapid Application Development. Official Website
OpenRefine: a tool used to process chaotic data, including cleaning, transforming, using Web Service for extension, and associating it to a database. Official Website
RoboVM: Write native iOS applications in Java. Official Website
Quartz: powerful job scheduling library. Official Website
Application monitoring tools
A tool that monitors applications in the production environment.
AppDynamics
be serious.It's easy to write an app, and it's hard to write a good app. How to test the performance status of the APP you wrote, user experience?What is APM?
In the fields of information technology and Systems management, application performance management (APM) are the monitoring and management of performance and availability of software applications. APM strives to detect and diagnose complex application performance problems to maintain a expected level of service. APM is "the trans
bottlenecks are temporary and the overall execution time should be reduced as the target bottleneck is eliminated.While it takes a lot of capacity to do a full review of the profile in a Java system, there are some common tools that can help you discover the performance hotspots of your system, including JMeter, AppDynamics, and Yourkit. Also, refer to the Dzone Performance Monitoring Guide for more information on Java program Performance optimizatio
Hermes: Fast, reliable message broker (broker) built on Kafka. Website
JBoss HornetQ: Clear, accurate, modular, easy-to-embed messaging tools. Website
JEROMQ:ZEROMQ's pure Java implementation. Website
Smack: Cross-platform XMPP client function library. Website
MiscellaneousNo other resources are classified.
Design Patterns: Implements and interprets the most common pattern of designs. Website
JIMFS: Memory file system. Website
Lanterna: Simple console text
Difficulties being solved using Java in the real world
We interviewed 11 business professionals, most of whom engaged in jobs related to the Java ecosystem. I asked them some questions about the actual problems they solved with Java in their career.
We interviewed these people:
Anthony Kilman, Tech Lead, AppDynamics | Gil Tene, CTO, Azul Systems | Bhartendu Sharma, Vice President of Operations, Chetu | Charles Kendrick, CTO and Chief effecect, Isomo
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