used memory

Why Choose Linux? Because Linux allows you to master everything you do!Why hate Windows? Because Windows lets you not know what you are doing!That's why I like Linux. As long as I want to, I can be the bottom of the system operating mechanism to see

The "four big names" of Linux process ManagementOne or four name catch The four big catch, originally appeared in Winrian creation of martial arts novels, is the court in the Justice of the power of the four disciples, four each bosom stunt,

First, uptimeThe results of the uptime command include how long the server has been running, how many logged-in users, and the overall evaluation of server performance (load average). The load average values are recorded for the last 1 minutes, 5

Linux memory management, in fact, and Windows memory management has a very similar place, are using the concept of virtual memory, said here have to scold MS, why in many times there is a lot of physical memory, but still use the pagefile. So often

Close the MMU and cache1.Cache is a small, but very fast-access memory that holds a copy of the data in the most recently used memory. By function divided into icache (instruction cache) and Dcache (data cache)2. The virtual address is the address

The free command provides a more concise view of system memory usage relative to top:$ freeTotal used free shared buffers Cachedmem:255268 238332 16936 0 85540 126384-/+ buffers/cache:26408 228860swap:265000 0 265000some of the relevant notes:Mem:

During system maintenance, it may be necessary to review the CPU usage at any time, and to analyze the system condition according to the corresponding information. In CentOS, you can view CPU usage by using the top command. After running the top

3.1 Judging if the object is dead reference-counting algorithmAdd a reference counter to the object, and whenever there is a place to reference it, the counter value is incremented by 1, and when the reference fails, the counter value is reduced by 1

OverviewSpeaking of garbage collection (garbage collection,gc), most people regard this technique as the companion product of the Java language. In fact, the history of GC is far greater than that of Java, and the 1960 birth of Lisp in MIT was the

Source: CSDN Wang Wensong transferred from Linux communeExit () and _exit () functionsFunction descriptionThe create process uses the fork () function, the execution process uses the EXEC function family, and the terminate process uses the exit ()

Query disk usage:[[email protected] ~]# DF-HL file system capacity used available% mount point filesystem Size used Avail use% mounted On/dev/mapper/vg_cssmana Gement-lv_root 24G 8.0G 15G 37%/tmpfs

How to view machine configuration under Linux? cpu/Memory/HDDDmesgDisplays the boot information. The kernel will store the boot information in the ring buffer. If you are too late to view the information, you can use DMESG to view it. The boot

Valgrind Overview ArchitectureValgrind is a set of simulation debugging Tools for Linux, open source (GPL V2). The valgrind consists of the kernel and other kernel-based debugging tools. The kernel is similar to a framework (framework) that

Play Linux within storage management-free　　The free command displays the idle, used physical memory and swap memory in the Linux system, and the buffer used by the kernel. In Linux system monitoring tools, the free command is one of the most

Run-time data regionWhen executing a Java program, the JVM divides the area he manages into several different data regions, each of which has its own purpose.1. Program CounterA program counter is a small amount of memory space that can be seen as

Domestic product designer/ui designers in the design of a slightly longer page, often add a "back to the Top" button, in the form of a fixed at the bottom of the bottom, there are floating small pictures (mostly). Take a look at two sample graphs:

An important advantage of Java is the automatic management of memory recycling through the garbage collector (garbage COLLECTION,GC), where programmers do not need to invoke functions to free up memory. As a result, many programmers think that Java

Linux memory management, in fact, with Windows memory management has a very similar place, are using the concept of virtual memory, said here have to scold MS, why in many times there is a lot of physical memory, but still used to pagefile. So I

During system maintenance, it may be necessary to review the CPU usage at any time, and to analyze the system condition according to the corresponding information. In CentOS, you can view CPU usage by using the top command. After running the top

Query command find * Find [specify find directory] [find rule] [action executed after find]* Find ~/.m2-name "*.lastupdated"-exec grep-q "Could not transfer" {} \; -print-exec rm {} \;(find files with lastupdated suffix that contain