cpu resources

In many cases, when the application administrator notifies us that the application is very slow and the database is very slow, we also find the same problem when performing the Select statements in the database for several examples, sometimes we

The operating system is the platform that provides the software to run the environment, the software running on the system is a process, considering the security problems they can not share data, so is the process. Threads are included in the

As the only routing protocol of the backbone network, ISIS has a high convergence speed. The common IGP route convergence method is to use HELLO packets to detect link failure and periodically transmit LSA (spread to neighbors when the entire LSA is

Oracle DatabaseOfOptimizationIt is one of the most important tasks in Oracle Database Operations. The optimization of Oracle Database can ensure that the Oracle database works normally.Unix environmentOracle Database optimization. I hope this will

Article Title: Dynamic logical partitions on LinuxonPOWER. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open

The concept of multithreadingI. Procedures and processes1, program: a static code.2, Process: a dynamic execution process of the program, it should be loaded from the code, execution to completion of a complete process.3, the process is also called

I haven't written any technical content for a long time. I want to write an article today (my colleagues found that I am only a porter): I ran puppet and giant cards on some machines running mongodb, it takes tens of minutes to run, and the top

1. symptom Description: 1. the CPU usage of % user and % sys is not high, but % nice occupies a large amount of CPU resources, with a maximum CPU usage of more than 60%; 2. In ps-elf, PRI is 90, NI is 10, and top is 30 and NI10. Question: Why is the

Background, start point, and target Coca-Cola Bottling Co. Coca-Cola lidated (CCBCC) produces and sells drinks, most of which are from Coca-Cola Company. CCBCC is the second largest Coca-Cola bottled factory in the United States. Its operation is

In the previous two articles: Network virtualization flowvisor: Network virtual layer (top) and network virtualization Flowvisor: The network virtual layer (middle) respectively introduced the characteristics and implementation of Flowvisor, three

What is a performance test?There are many online, to say the concept must first say classification, performance testing, stress testing, load testing, capacity testing ... In my opinion, just according to different test purposes (that is, to achieve

1. Where this code is noted:Alarm () function is not a blocking function, the program will continue to run down after timing;Pause () block function, which is called after the function is invoked, causing the program to hang.2. This place is apt to

First, The origin of demandWeb-server usually have a configuration, the maximum number of worker threads , the backend service generally has a configuration, the number of threads in the worker thread pool, the number of threads configured by

ObjectiveThe garbage collection algorithm has been described in more detail here, we will introduce the specific garbage collector in the JVM, in the virtual machine specification is not how to implement the garbage collector, so each manufacturer's

Related ConceptsConcurrency and parallelismThese two nouns are concepts in concurrent programming, which can be explained in the context of the garbage collector. Parallel (Parallel): Refers to multiple garbage collection threads working in

SQL Server CPU 100% is not very common. It generally causes performance problems, such as blocking, connections, and I/O disks. Therefore, the usage of SQL Server is generally low. However, in some cases, the CPU usage is 100%.   What operations

  Non-blocking socoket Programming Today, when the Internet is quite

Those who have used Winsock APIs know that WinSock programming is very convenient.Whether it is the underlying API wsaasyncselect () or the asynchronous socket class of MFC:Casyncsocket provides messages such as fd_accept, fd_read, and fd_close.For

11 anti-DDoS Attacks:1. Ensure that all servers use the latest system and install security patches. The Computer Emergency Response Coordination Center found that almost all systems under DDoS attacks were not patched in time. 2. Ensure that the

Pioneering ageDomesticProgramMost of the members felt the charm of the garbage collection technology for the first time in the Java language, so many people regard Java and garbage collection as an inseparable whole. But in fact, the garbage