file system cache

What is the difference between buffer and cache in the linux free command ~ $ Free total used free shared buffers cachedMem: 1025204 981636 43568 0 38244 387808-/+ buffers/cache: 555584 469620 Swap: 1931256 162948 1768308 www.2cto.com you can also

Lists the development advantages of the PHP Yii 2 framework. When the Yii framework is still in the RC (Candidate version) stage, we have reported that it has just reached the candidate version stage (now it has released the official version) we

As the company's website traffic grows, MySQL naturally becomes a bottleneck. Therefore, I have been studying MySQL optimization recently. The first step is to naturally think of MySQL system parameter optimization, as a database system for a

From the perspective of simplified installation ==> Performance Tuning ==> convenient maintenance, we will discuss the WEB service planning ==> HTTPD installation/application module configuration ==> upgrade/maintenance processes. The upgrade of

The back_log value indicates how many requests can be stored in the stack within a short time before MySQL temporarily stops answering new requests. Only if you want to have many connections in a short period of time, you need to increase it. In

Decompress the memcache Server installation package to the C: \ memcached folder and use the CMD command window to install the package. 1> Start> Run: cmd (OK) 2> Cd c: \ memcached (Press ENTER) 3> memcached-D install (Press enter to execute the

Before introducing the disk I/O monitoring command, we need to understand the disk I/O performance monitoring metrics, as well as the disk performance of each indicator. Disk I/O performance metrics include:Metric 1: I/O per second (iops or TPS)For

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Reprint: http://www.infoq.com/cn/articles/anatomy-of-an-elasticsearch-cluster-part02Consensus-the importance of split-brain issues and legal votesConsensus is a fundamental challenge for distributed systems. It requires that all processes/nodes in

Android Common Image Loading library The picture loading involves the image cache, the picture processing, the picture display and so on. The four commonly used picture loading frames are fresco, Imageloader, Picasso, Glide, respectively.Universal

Reprint Please specify http://write.blog.csdn.net/postedit?ref=toolbarClick to download the required jar fileFor details , please dabigatran 284568173 Download PDF yourselfProject Description:Android The most annoying thing is to get pictures from

Load is an important indicator of the Linux machine, which intuitively reflects the current state of the machine. If the machine load is too high, then the operation of the machine will be difficult.Linux has a high load, mainly due to CPU use,

Some time ago in the player's time, encountered a problem, took a long time, to make a record, hoping for the need to help people:Player's broadcast video, whether it is to manually switch video or video playback completed, automatically switch

Performance diagnostics for Linux in 60,000 millisecondsWhen you log on to a Linux server in order to solve a performance problem: What should you check in the first minute?At Netflix, we have a huge EC2 Linux cloud, as well as a number of

I. Description of the VMSTAT commandThe most common Linux/unix monitoring tool must be vmstat, Vmstat is the abbreviation for virtual meomory Statistics (dummy memory statistics) that shows the state value of the server at a given time interval,

Understanding load average in Linux systems (graphic version)Blog Category: Linux Linux load Nagios One, what is load average?The load on the Linux system is a measure of the current CPU workload (wikipedia:the system load is a measure

1.1: What is load? What is load Average?Load is the measure of how much the computer works (wikipedia:the system load is a measure of the amount of work, a compute system is doing)This is simply the length of the process queue. Load Average is the

1 CPU hotspot Analysis positioning backgroundCPU resources are still very expensive, in order to feel this expensive, the current CPU price of resources:So for the program apes, it is necessary for the program to use CPU resources reasonably and

1, what is Memcached1.1, memcached overviewMemcached is a free, open source, high performance, distributed memory object caching system that accelerates dynamic Web applications by reducing database load1.2. memcached and database interaction

Windows XP Ultimate Setup Windows XP Ultimate Setup (painstaking edition) Statement: The above data are collected from the Internet from the collation, I have not one by one test, so in the change to be careful, do a backup, preparedness,