file system cache

The Linux uptime command is primarily used to obtain information such as host uptime and query Linux system load. The uptime command used to show only how long the system was running. Now, you can show how long the system has been running, the

Reproduced in: http://www.itxuexiwang.com/a/liunxjishu/2016/0225/168.html?145648414060,000 Performance diagnostics for Linux in millisecondsWhen you log on to a Linux server in order to solve a performance problem: What should you check in the first

Original: http://coolshell.cn/articles/17049.htmlThe famous left ear mouse article, very simple introduction of the Linux Cgroup technology, after reading must let you understand Cgroup technologyEarlier, we introduced the Linux Namespace, but

Tag:linux    load     memory    cpu    $ vmstatprocs-----------memory-------------Swap-------io------System-------CPU------r B swpd free buff cache Si so bi bo in CS us sy ID WA St 1 4 329796 26040 4528 3379824 1 1 50 160 36 17 2 10 85 3 0 The

Disk I/O monitoring is a very important part of unix/linux system management. It can monitor the throughput, the number of I/O per second, disk utilization, service time and other information, and when the exception is found, send alarm information

1, Sync Sync:flush file system buffers. Sync Command function: Refreshes the file system cache and writes data to the hard drive synchronously. The need to perform the sync command: In a computer, the data processed by the CPU is first read into

Project Introduction: One of the biggest headaches on Android is getting pictures, displays, recycling from the web, and any problem with a link may be directly oom, and this project may help you. The purpose of Universal Image Loader for Android

MySQL Binary log is often said to Bin-log, is the MySQL implementation of changes generated by the binary log file, its main role is two:* Data reply* Master-slave database. For the slave end to perform additions and deletions, keep sync with master.

The example in this article describes how Laravel uses caching cache data to mitigate the pressure of database queries. Share to everyone for your reference, specific as follows: Yesterday I wanted to make a cache of the homepage of my blog, which

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 load is high, mainly due to CPU usage,

This section describes what happens when a Linux system boots and shuts down, and should be done correctly. If the correct procedure is not followed, the file may be corrupted or missing. Boot and Shutdown overview The process of turning on a

Hardware Optimization 　　 1, Memory performance optimization There are several options in Windows XP that can optimize memory performance, all of which are located under the registry: Hkey_local_machinesystemcurrentcontrolsetcontrolsession

The company's Web site access more and more large, MySQL naturally become a bottleneck, so recently I have been studying MySQL optimization, the first natural thought is the MySQL system parameters optimization, as a large number of visits to the

The difference between memory buffer and cache in Linux 2011-10-04 14:40:18 This article turns from: http://blog.chinaunix.net/uid-24020646-id-2939696.html Careful friends will notice that when you frequently access files under Linux, physical

performance counters for loadrunner monitoring today, I put up some of my counters and their threshold requirements, etc., which are for my Windows operating system, C/s structure of SQL Server database and Web platform. NET product test some of

Method Description: Sync version of Fs.open (). Grammar: Copy Code code as follows: Fs.opensync (path, flags, [mode]) Because this method belongs to the FS module, it is necessary to introduce FS module (VAR fs= require ("

Problem Description: LoadRunner as the industry's most popular performance testing tool, the application has been very extensive. LoadRunner How to analyze performance data, this is every performance testers are very concerned about the topic. But

This section describes what happens when a Linux system boots and shuts down, and should be done correctly. If the correct procedure is not followed, the file may be corrupted or missing. Boot and Shutdown overview The process of turning on a

Vmstat and Iostat are important two performance monitoring tools for Linux.Vmstat-Brief information on memory, processes, and paging Procs R indicates how many processes are waiting for the CPUb indicates how many processes are hibernating

MySQL environment variable settings (Windows environment) 1, for Command control, in the CMD command under the operation is very convenient, but sometimes need to directly in the command line of the bed empty to execute MySQL such commands, will