angular 2 state management

Check the database log, with the following error message: error:9002, Severity:17, State:4. The transaction log for database ' sharedservices1_search_db ' are full. To find out why spaces in the log cannot be reused, and the Log_reuse_wait_desc column in sys.databases To view the usage of the current log: The log is not fully full, but it has taken up 79% of the 70GB log file, and more than 50 GB, and it is not normal for the individual to feel this.

In general, the HTTP protocol is a stateless service, and it does not save any user request information. Web applications have been greatly developed until Netscape began using cookies to save user request information. Now asp.net programmers can save user request information in a number of ways. Here are a few ways to ASP.net about client state management. asp.net, which provides cookies, querystrings (U

Kafka Cluster management, state saving is realized through zookeeper, so we should build zookeeper cluster first Zookeeper Cluster setup First, the SOFTWARE environment: The zookeeper cluster requires more than half of the node to survive to be externally serviced, so the number of servers should be 2*n+1, where 3 node is used to build the zookeeper cluster. 1.3

Through the above article, I believe that we have a general understanding of the principle of GTD, if you are not very familiar with the collection, you can go to see.When we collect a lot of ideas and things, we have to empty the collection box at the party, otherwise the collection box will be piled up, and the collection box eventually becomes the garbage bin.Let me introduce the second step of GTD, "Management of the Collection box", here is the m

Linux Process Management (version 2)-process management commandsProcess Management commands 1. View user information 1. Meaning of w display information TTY: indicates the user logon method. ttyN: Indicates logging on from a local terminal; pts/N indicates logging on from a remote terminal. JCPU: distinguished by Termi

) readbook{NSLog (@ "Reading book is:%f", _book.price);//}[Stu readbook];//not safe, visiting _book,because in test book was released so (wild pointer)}-------------------------Change codeMain () {Test (STU);Test1 (Stu);}-----------------------------Student want to make use of the book object So, retain book in studentSetbook Retain;stu alloc Release---------------------------------Improve CodeSo compare the passed book object with a current book object if not the same one,Release the previous o

2.2 Process Control 2.21, 2.22 Concepts: Process control is the most basic function in process management. Creates, terminates, and is responsible for status transition during process running. Process control is generally implemented by the primitive in the OS kernel. A primitive is a process composed of several commands used to complete certain functions. It differs from general processes in that they are "Action operation )". That is, th

called "listeners" on the Leekmanager that have a reference to all of Those activities.But, where do you come from?Well, check this out: // in Leekfragment.class: @Override public void OnCreate (Bundle savedinstancestate) { super .oncreate (savedinstancestate); // Add this fragment as a leek listener so // It can update its view accordingly Leekmanager.get (). AddListener (this Every time LeekFragment we are created, we add it as a to the LeekListener LeekManager Singleton. B

2. Why is configuration management required? Without Software Configuration Management, the biggest trouble is that work results cannot be traced back. As work progresses Program Covering the old program, what should I do when I suddenly find that the new program has a problem and the old program is correct? You can only rewrite the old program to overwrite the

1. PrefaceHere generic PM, is the name of the snail, refers to the Linux system of the regular power management means, including shutdown (power off), standby (Standby or Hibernate), restart (Reboot) and so on. These tools are used in the PC or server era before embedded Linux is popularized. In the wild days of computer science, human beings, stimulated by Moore's law, diligently pursued the computing power and processing performance of computers, so

, calls Device_power_down (), and it calls the Suspend_late () function, which is the function that the system actually goes into the last call to sleep, The final check is usually done in this function. If the check is fine, then hibernate all the system devices and buses, and call Suspend_pos->enter () to get the CPU into a power-saving state. At this point, it is dormant, and the execution of the code stops here. (4) Resume. If the system is inter

Spring Web Flow is a novel java™web framework that extends the spring MVC technology. Application development using Spring Web flow is expanded around the use cases defined as Web streams. Organizing a development workspace based on a Web stream makes the development experience more meaningful and contextual. In addition, the support of Spring Web flow for jpa/hibernate persistence is one of its most important server-side improvements. Although the SpringSource and spring Web Flow Project group

1. PrefaceThe series of articles about memory management in this article is mainly about the memory management knowledge lecture of Chen Li June teacher.This lecture is divided into three topics on memory management: Hardware foundation of memory management, management of vi

, performance requirements, implementation requirements, and release requirements from the information system perspective; 5, Problem management (1) problem management includes System Bugs, small demands raised by the customer, and small improvements made by the system, which are generally tested, investigated, or proposed by the customer; (2) problems can be obt

today, we focus on the analysis of the thread class. This class has some properties for information. These properties can be used to identify a thread, show the state of a thread, or control the priority of a thread. ID: The unique identity of the thread is saved.Name: Names of the threads are savedPriority: Saves the thread's precedence.Status: The state of the thread is saved. The threads in Java have the

application label, piling dump and thread dump, and opening the snapshot in the main window.(2) Details windowdetailed information about the application is displayed in the Details window. When you view data about an application, each label in the Details window represents an application, which allows you to easily view and navigate the data. The saved thread dump and heap dump can also be opened in the Details window. FiveVISUALVM plug-in For exampl

Author: gzshun. Original Works. Reprinted, please indicate the source! Vold is the core part of the Android system processing disk. It replaces the udev in the original Linux system and is mainly used to process hot swapping storage devices in the Android system. In systems later than android2.2, the vold source code has been moved to the system directory, and the vold directory contains the following source code:── Android. mk── ASEC. h├ ── Cleanspec. mk── Commandlistener. cpp── Commandlistene

, the flag is set, and the flag is set when a high-priority process enters the executable state. The occurrence of user preemption When returning user space from system call When returning user space from an interrupt handler User preemption occurs when the kernel returns to user space and is need_resched set to cause a schedule() callThe occurrence of kernel preemption When returning kernel space from the interrupt pro

Linux kernel source code scenario analysis chap 2 Storage Management (4)Usage and turnover of physical pages 1. Several terms 1.1 virtual storage pages A fixed size in a virtual address space. The boundary is 4 kb aligned with the page size and its content.1.2 physical page Relative to a VM page, the page must be mapped to a page on a physical storage medium. Based on whether it is in memory, we can divide

= [[NSAutoreleasePool alloc] init]; [pool release]; } Because the advanced automatic release pool does not release its objects until the thread exits. Long-running threads need to create an additional automatic release pool to release its objects more frequently. For example, a thread using the run loop may create and release the automatic release pool after each cycle is completed. Releasing objects more frequently can prevent performance problems caused by high memory usage of your appli