shared memory size

3 Pre-installation inspection and configuration about this chapterThis section describes the preparation and configuration work before installing oracle11g R2. All operations in this section, if not specifically stated, need to be operated on two

Ipcs-provide Information on IPC facilitiesDESCRIPTIONIPCS provides information on the IPC facilities for which, the calling process has read access.The-i option allows a specific resource ID to be specified. Only information on the this ID would be

One CPU performance monitoring Tool 1 Vmstat, System comes withProcs columns:R column: Indicates the number of processes running and waiting for the CPU time slice, if this value is longer than the number of system CPU cores, indicating that the CPU

What is the average machine load?The number of processes queued for CPU processing during a specific time interval, the more processes queued, the slower CPU processing, and the average load on the machineHow do I measure whether the current system

Background:Company A large business system feedback the recent database server is always down (described here is not accurate, explained later), finally, the customer, operation and maintenance personnel feel really unbearable, the project manager

TOP–HV | -abchimmss–d delay–n iterations–p pid [, PID ...]The top program provides a dynamic, real-time view of the running system that displays system profiles and a list of tasks currently managed by the Linux kernel. The types of system profiles

Before we start Opcache, let's introduce the compilation and explanation:The compiler compiles each statement of the source program into a machine language and saves it as a binary file so that the runtime computer can run the program directly in

Task Manager under Windows is not easy to use (individuals prefer Process Explorer), but it is also convenient to view processes, CPU, memory ... It's also easy to end the processThere is no GUI Linux, there are commands to implement Windows Task

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

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

First, the basic conceptinter-process communication IPC: The process of exchanging data between processes is called interprocess communicationinter-process homosexual approach:simple inter-process communication:command line: The parent process

As we all know, the teaching materials of the major institutions are often secret, but xxx this time to benefit everyone! This is the Linux environment of the top command related content, I hope to be able to help you learn Linux.Top[email protected]

Top (Topas), Vmstat,iostat is displayed under Linux and AIX operating systemsCategory: Linux basics 2013-08-09 17:26 1093 people read reviews (0) favorite reports Detailed list of commands commonly used parameters, in their own virtual machine,

Article Title: View CPU information in Linux. 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 source. The top command

In the Android anonymous shared memory driver source code analysis, this article introduces the implementation process of the anonymous shared memory driver. Based on the Android anonymous shared memory driver, this article introduces the Android

Brief introductionOptimizer+ is the first and fastest opcode caching tool for Zend developed closed-source, but free-to-use PHP optimization acceleration components. Now, Zend technology company will optimizer+ under PHP License open source becomes

Programmers who have developed PHP should be clear that PHP has many built-in functions and can master them to help you better develop PHP, this article will share eight essential PHP functions, all of which are very practical and I hope all PHP

The top command is a common performance analysis tool in Linux. it can display the resource usage of various processes in the system in real time, similar to the Windows Task Manager. The following describes how to use it. Top-01: 06: 48up1: 0.06

This article mainly introduces php's implementation of reading the memory sequence number, which is very simple and practical. if you need it, you can refer to it as a record. the osc site should have repeated SemWrapper. class. php /** Semaphore )

APC is the best-performing code cache in PHP5.4 and earlier versions. However, after PHP is upgraded to 5.5 or above, APC is no longer valid. The Zend OpCache extension is required. The configuration command is as follows: [Opcache] zend_extension