real memory

In the Linux memory allocation mechanism, the first use of physical memory, when the physical memory is idle (enough), does not release its memory consumption, even if the memory-hogging program has been shut down, the program occupied by the memory

Reprint: http://blog.csdn.net/wxwsixis/article/details/5752186The last few days found that the server's memory (RAM) and swap usage is very low, so think of so many resources, not to waste it? Google a bit, met Tmpfs, in general, TMPFS is a virtual

performance test: CPU memory, HDD IO read/write, bandwidth speed, Unixbench First, CPU physical number, kernel, hyper-threading, multi-core 1, login terminal, execute: cat/proc/cpuinfo, will show the VPS host CPU detailed parameters, such as the

Introduction to Linux In August 1991, in Chihu-Finland, a young man named Linus Torvalds released a Unix-like operating system and named it Linux, and put it on the largest FTP site in Finland, so far, a miracle appeared! Since Linux from the outset

Oracle Beginner's TipsOracle's system is too large, for beginners, it is inevitable that some will not be able to feel, what all want to learn, the results of what are not good, so the learning experience to share, I hope that the people just

The swap partition is a Linux swap partition. The swap partition actually exists on the disk, but the Linux system can use it as memory, and swapping partitions can exchange data with real memory when the physical real memory is low. To put it

TMPFS Introduction TMPFS is a virtual memory file system, not a block device. is a memory-based file system that does not need to be initialized with MKFS, etc. when created Its biggest feature is its storage space in the VM (virtual memory), the

Release the UbuntuLinux system cache and increase the available memory space. a desktop memory has a total of 3 GB, but the free memory is only 200 MB, which cannot meet the jvm requirements of scala. Use the top command to view the real free memory.

This article describes how to install and configure MySQLMTOP to monitor MySQL running performance. MySQLMTOP has a BS graphical operation page. For more information, see I. environment description1. server role 2. system environmentCentOS 6.2 x86_

Install and configure MySQLMTOP to monitor MySQL running performance, I. Environment Description1. Server role 2. System EnvironmentCentOS 6.2 x86_64 3. environment requirements(1) MySQL 5.0 and above (used to store data collected by the Monitoring

TMPFS is a memory-based file system thatTmpfs sometimes use RM (physical memory), sometimes swap (a piece of disk area). Allocate according to the actual situation.RM: Physical memory. A short name for real memery? Real memory is the memory bar on

In a previous article that said activity monitor, the official explanation is that (Activity Monitor) Displays the CPU, memory, and network usage in real time, recording the system load measured by the virtual memory size. In a plain English,

the memory management mechanism used in the embedded system mainly has the following two kinds:1. Virtual memory management mechanism:There are some embedded processors that provide the MMU, with memory address mapping and addressing in the MMU,

TMPFS IntroductionTMPFS is a virtual memory file system, not a block device. is a memory-based file system that is created without the need to initialize with MKFS, etc.Its biggest feature is its storage space in VM (virtual memory), the VM is

Linux system partition and Mount Linux system partitionThere is a big difference between Linux partitions and Windows. In Linux, there is no graphical partitioning interface, so we cannot see the disk partitioning interface for C-drives and D-disks

1,windows graphical interface is only popular on personal computers (Dos interface), LUnix is in the server domain, there is absolutely no graphical interface (command line) on the server.2,2.6.18 motherboard, minor version, last versionIf the last

Get this set of Lenovo Linux, packaging is very practical, a book size of the box neatly loaded with four CD-ROM, the four disks are system installation disk, source code disk, application disk, text-Jie word processing software disk. There is also

I. Environmental description1, Server role 2. System environmentCentOS 6.2 x86_64 3. Environmental requirements(1), MySQL 5.0 and above (used to store the data collected by the monitoring system)(2), Apache 2.2 and above (WEB server running

1. Overview What is threadlocal? In fact, Threadlocal is not a local implementation version of a thread, it is not a threaded, but a threadlocalvariable (thread local variable). Perhaps it would be more appropriate to name it Threadlocalvar. The

The size of the VM under Linux is made up of RM (Real memory) and swap, and the size of the RM is the size of the physical RAM, and the size of the swap is up to you. Swap is a virtual memory space through the hard disk, so it is much slower to read