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Linux commands-analyze CPU bottlenecks

samples and is optional. the default value is 1.-o file indicates The result is stored in the file in binary format. the file is not a keyword but a file name. Options is the command line option, and there are many options for the sar Command. below, only common options are listed:-A: Total of all reports. -U: CPU usage-v: process, I node, file, and lock table status. -D: Hard disk usage report. -R: Memory and swap space usage statistics. -G: Serial port I/O. -B: buffer usage. -A: file read/wri

Meaning of cpu usage in linux top Command, linuxtop

of interruptions, indicating that a considerable amount of time in the kernel overhead is in the Context switching thread.2. A large number of context switches will result in unbalanced CPU utilization classification. Obviously, the percentage of requests waiting for io (wa) is very high, and the percentage of user time is very low (us ).3. Because the CPU is blocked on IO requests, a considerable number of runnable threads in the running queue are waiting for execution.4.4 use of the mpstat To

Linux performance monitoring and tuning (CPU)

utilization statistical value provided by the mpstat command is roughly the same as that provided by vmstat, but mpstat can provide a statistical value based on a single processor.# Mpstat-P all 1Linux 2.4.21-20. elsmp (localhost. localdomain) 05/23/200605:17:31 CPU % USER % nice % System % idle intr/s05:17:32 pm all 0.00 0.00 3.19 96.53 13.2705:17:32 PM 0 0.00 0.00 0.00 100.00 0.0005:17:32

Interaction Designer's work everyday

office, look at the email, row their own day design work, marking the focus. 9:15 am, centralized processing requires a person to think about the design of the problem, painting on paper, writing content design ideas, indesign,ps,omnigraffle. 10:00 am, quick meeting, and product manager, development together within 15 minutes of yesterday's results, obstacles, and today's tasks. 10:30 am, Product Manager needs a quick seminar to get new needs, dialectical thinking, PK. 11:00 am, and visual

ADB common commands

2 10:57 bu drwxr-xr-x 3 xuxu staff 102B 4 2 10:57 content drwxr-xr-x 3 xuxu staff 102B 4 2 10:57 ime drwxr-xr-x 3 xuxu staff 102B 4 2 10:57 input drwxr-xr-x 3 xuxu staff 102B 4 2 10:57 media drwxr-xr-x 3 xuxu staff 102B 4 2 10:57 pm drwxr-xr-x 3 xuxu staff 102B 4 2 10:57 requestsync drwxr-xr-x 3 xuxu staff 102B 4 2 10:57 settings drwxr-xr-x 7 xuxu staff 238B 4 2 10:57 svc drwxr-xr-x 6 xuxu staff 20

Php-fpm Optimization

Request_terminate_timeout30 # indicates that after 30 seconds, php scripts that are not automatically ended are ended to release the occupied resources. Pm indicates the method used, that is, static (static) or dynamic (dynamic ). In older versions, dynamic is called apache-like. Pm. max_children: ph enabled in static mode Request_terminate_timeout = 30 # indicates that after 30 seconds, php scripts that ar

Translation: Linux Power Management Architecture

Device Power Management Copyright (c) 2010 Rafael J. Wysocki Copyright (c) 2010 Alan Sternstern@rowland.harvard.edu **************************************** ********************* This article is translated by droidphone from 2011.8.5. **************************************** ********************* Most of the Linux source code belongs to the device driver code. Therefore, most of the power management (PM) Code also exists in the driver. Many drive

[MSDN] Latest Win7 SP1 all editions download

Windows 7 Ultimate with Service Pack 1 (x64)-DVD (chinese-simplified)File name Cn_windows_7_ultimate_with_sp1_x64_dvd_u_677408.isoRelease date (UTC): 5/12/2011 2:46:19 pm Last Updated (UTC): 5/12/2011 2:46:19 pmSha1:2ce0b2db34d76ed3f697ce148cb7594432405e23 ISO/CRC:69F54CA4: Cn_windows_7_ultimate_with_sp1_x64_dvd_u_677408.iso (3.19 GB)ed2k://|file|cn_windows_7_ultimate_with_sp1_x64_dvd_u_677408.iso|3420557312| b58548681854236c7939003b583a8078|h=tqxcjq2

Once the Oracle EM experience is configured

switch was not included with the This command:5.re-start Database Control by executing the following command on each node in the cluster:After patching. Clear and new EM, a variety of error, helpless under the manual deletion of various data:Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.5.0-64bit Production with the partitioning, Real application Clusters, OLAP, Data Mining and Real application testing Options sql> DROP public synonym Sete Mviewusercontext; Synonym dropp

Configuring Oracle Database Control with EMCA installation under the command line interface

, without giving us the opportunity to modify the Sysman permissions. So we have to give Sysman required permissions to the public account before running EMCA, so that when the Sysman account is created, it will automatically have the appropriate permissions.So what exactly does it take to give sysman those privileges? The answer is a lot. My approach is to run EMCA first, if there is a problem with the permissions EMCA will be coarse, and then based on the error log to find the missing permissi

What does PHP mean? Solution

What does PHP mean! $ Status amp; $ status = $ pm ['msgtoid'] amp; $ pm ['new']; what does PHP mean ,! $ Status amp; $ status What does PHP mean? ! $ Status $ status = $ pm ['msgtoid'] $ pm ['new']; What does PHP mean? ------ Solution -------------------- ! $ Status $ status = $

Android implements Silent Installation and uninstallation

Method 1: [call the interface method. Because some APIs for installing and detaching an application are hidden, you must download the Android system source code, after development and compilation in the source code, use the MM command to compile and generate an APK file] Import java. Io. file;Import Android. App. activity;Import Android. OS. Bundle;Import Android. content. intent;Import Android. content. PM. packageinfo;Import Android. content.

Animation school animation festival, weekend reservation!

Time Location Content Specific Arrangement June 9 Multi-function hall Development Orientation of art education and creative Culture Industry Forum Am-Am Zhangye Park Plaza Opening ceremony PM-PM Zhangye Park Plaza Tens of thousands of signatures and graffiti walls PM-

SharePoint Features-elements, scope and other info

. Links: Delegate Control Schema Custom Action (Farm,WebApplication,Site,Web) You can define the following kinds of custom actions: Content type links for the content type settings page Drop-down menu actions for the drop-down menu that appears for an item Form toolbar buttons for New, Edit, or Display form toolbars. Site Settings link forSite SettingsPage. In a custom action it is often required to pass context arguments on the URL in the

Perl use (), require (), Do (), % INC and @ INC

'strict. PM =>/usr/lib/perl5/5.00503/strict. PM SinceStrict. PMWas found in/Usr/lib/perl5/5.00503/Directory and/Usr/lib/perl5/5.00503/Is a part@ INC,% IncProvided des the full path as the value for the keyStrict. PM. Now let's create the simplest module in/Tmp/test. PM: Test.

Changes in power management methods in the new Linux system device Architecture

Source: http://blog.csdn.net/coolraining/article/details/6678759 Changes in power management methods in the new Linux system device ArchitectureLinux-2.6.32 based on I. Power Management in each data structure of the device model The device model of Linux is described in combination by multiple struct, such as struct device, struct device_type, struct class,Struct device_driver, struct bus_type, and so on.@ Kernel/include/Linux/devices. h contains the struct definitions. Here, only

Java version of the SHA-1

, make sure to apply the same change in the ' sha1.js ' library or your won ' t get the same encrypted. * Can call each one of the 6 work methods by using something LIKE:SHA1.HEX_HMAC_SHA1 ("key", "data"); * They are the only public methods. All are public and static. You have no reason the private ones anyway.* * JavaScript Version 2.1 Copyright Paul Johnston 2000-2002. Contributors to JavaScript Version:greg Holt, * Andrew Kepert, Ydnar, Lostinet distributed under the BSD license* * * * */ Pub

Linux SAR view network traffic __linux

Sar-n DEV 1 10-n {keyword [,...] | All} network statistics. Iface Name of the network interface for which statistics are. RXPCK/S total number of packets received/second. TXPCK/S total number of packets transmitted/second. RXKB/S total number of kilobytes received/second. TXKB/S total number of kilobytes transmitted/second. RXCMP/S number of compressed packets received per second (for Cslip etc.).

Share 8 years of development experience, talk about personal development experience, and clarify your development direction

project manager is generally no more than 15%. However, China is the country with the largest population in the world, and there are a large number of domestic talents, so the abuse of talents is often seen. A small company's Development Department often sees new faces, but PM does not change. Because the boss knows nothing about technology, and in their opinion, it is only to hold the PM's mind, that can be done in terms of technology. As for the te

From programmers to Technical Directors, sharing 10 years of development experience

world, and there are a large number of domestic talents, so the abuse of talents is often seen. A small company's Development Department often sees new faces, but PM does not change. Because the boss knows nothing about the technology, and in their opinion, they only need to hold the PM's mind, so the technical aspects can be decided. As for the technology department, we need to change people, they don't have to worry about it. Therefore, the transit

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