# nested loop connection methodOuter table: Cost: 444 CDN: 221324 rcz: 109 resp: 444Inner table: vw_nso_1 # The internal table is vw_nso_1, that is, subquery.Access path: TSC resc: 16Join: resc: 3652290 resp: 3652290Column: RID Col #: 1 Table: from $ _ subquery $ _ 002 alias: from $ _ subquery $ _ 002No statistics (Using defaults) # because it is a subquery and rowid is returned, there is no statistical informationNewcastle: 221324 nulls: 0 dens: 4.5
CPU and ram. Of course, you can also observe hard disk I/O changes. In the preceding example, we can find that the CPU idle takes a long time to observe the CPU. In addition, % memused (percentage used) and % swpused (percentage used in virtual memory) are commonly used to view Ram. This is very convenient and clear! As a matter of fact, laruence has used SAR as a tool for MRTG to plot charts, which is very convenient. However, this suite is not installed in Ubuntu by default,
Next we will comp
, it needs to regenerate a plug-in file plugin-cfg.xml, which contains the ing of the routing application.
The company bought services for almost all Oracle and IBM products, so they could harass their customer service hotline when encountering problems. Today, a friend went to TSC and I called them, he helped me answer this question directly. Unfortunately, the phone number was recorded and he did not dare to chat!
IHS has many other functions, suc
typescript module/syntax highlighting. You need to install the typescript plug-in. Similar to sublime text, the vim and emacs editor supports syntax highlighting. The vs 2012 editor also provides refactoring and go to definition functions.
Note: typescript does not rely on any IDE. You can compile typescript into Javascript in any application. How to obtain
You can install typescript in the following two ways:
Use node. js Package Manager (NPM)
Msi inherited from Visual Studio 2012. (Clic
I. Summary
A timer is a basic component in the operating system. Whether it is user space program development or kernel space program development, a timer is often required as the basic component. The purpose of using a timer is nothing more than to periodically execute a task, or to execute a task at a specified time.
This article first discusses the classification and implementation of timers in Linux, and uses corresponding interface functions.
Ii. Timer types
RTC (real time clock)
Real-time
If you have understood nodejs, you should be familiar with the following syntax:
Math. js
exports.add = function(n1, n2){return n1 + n2;}
Server. js
var math = require('./math.js');math.add(1,2);
In this way, you can import JS files in JS files. However, in web development, we usually need to import all JS files in order on the HTML page. Similar methods are also provided in Typescript.
Compoment. Ts
export class Compoment { private element: Element; private id: string; constructor
Linux KVM installation 1: first check whether the hardware supports Virtualization: execute the following command in the terminal # egrep 'svm | vmx'/proc/cpuinfo to output the following information: flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dtsacpi mmx fxsr sse %sse2 ss ht tm pbe lm %pebs %pni %monitor ds_cpl vmx est %16 xtpr pdcm movbe lahf_lm dts tpr_shadow vnmiflags: fpu vme de pse
A lot of dynamic online skinningArticleHere, I will record the skin replacement I wrote when I developed a control.Program.
First, write a resource file (XAML)
Xmlns: x = "http://schemas.microsoft.com/winfx/2006/xaml"Xmlns: TSC = "CLR-namespace: boco. Imp. Gui. toposubject. Controls">Horizontalalignment = "center" verticalignment = "TOP"/>Verticalalignment = "center" horizontalalignment = "center"Fontfamily = "" fontsize = "10" cliptobounds = "fals
the latest information about the physical environment of the system. Although files in/proc are virtual, they can still be viewed using any file editor or programs such as 'more', 'less ', or 'cat. When the editing program tries to open a virtual file, the file is created out of thin air by the information in the kernel. Here are some interesting results I got from my system:
$ ls -l /proc/cpuinfo-r--r--r-- 1 root root 0 Dec 25 11:01 /proc/cpuinfo$ file /proc/cpuinfo/proc/cpuinfo: empty$ cat /p
Environment: Ubuntu 12.04 Server
1. KVM Installation
First, check whether your processor supports hardware virtualization. If yes, run the following command:
Egrep '(vmx | SVM)' -- color = always/proc/cpuinfo
The following content should be displayed:
[Email protected] Ubuntu :~ # Egrep '(vmx | SVM)' -- color = always/proc/cpuinfo
Flags: fpu vme de pse tsc msr pae mce cx8 APIC Sep mtrr pge mca cmov Pat limit 36 clflush
MM
. Otherwise, the chances of getting stuck are relatively high. Even taking a lot of detours >_After the installation is complete, add acpi = off noapic nolapic to the kernel line in gedit/boot/grub/menu. lst.
Otherwise, even if you have installed it, the restart may fail ~!
Note: the possible situations of getting stuck do not occur at the same time.
Start bluetooth ....
Stoping bluetooth ....
Usb-submit_urb (ctrl) failed
Corrupted low memory at c000ffc
Memory failed uption detected in lo
Egret is developed based on TypeScript, while tsc is developed based on Node. js. Therefore, during the installation process, we must first install the basic support tools. The software to be installed is as follows:
Node. jsTypeScriptTypeScript code editorHTTP server (optional)Chrome (optional)EgretThis document describes how to install Egret in Windows. The installation steps are as follows.
1. Install Node. js
1.1 download Node. js
The method for
1 Installing a new packageSu-c ' yum install tsclient 'Install package GroupSu-c ' Yum groupinstall ' MySQL Database '2 Update packageSu-c ' Yum update tsclient 'Update package GroupSu-c ' Yum groupupdate ' MySQL Database '3 Uninstalling packages (and dependent packages)Su-c ' yum remove tsclient 'Uninstalling a package groupSu-c ' Yum groupremove ' MySQL Database '4 FindLook for packages that you can use from the Yum source, or packages that are already installed on your system. Find default co
To manually start the Mcelog method:# Mcelog--daemonRun Mcelog in daemon mode, waiting-errors from the kernel.Background service startup Mcelog:
RHEL 7:
Systemctl Start Mcelog
Systemctl Enable Mcelog
RHEL 6:
Service MCELOGD Start
Chkconfig MCELOGD on
To view the Mcelog log:# Vim/var/log/mcelogTo see if the Mcelog daemon detected an error message:# Mcelog--clientQuery a currently running Mcelog daemon for errorsThe MCE output when parsing a system exception:
–pending Break EnableSyscall–syscall/sysretMP–MP capableNx–execute DisableMMXEXT–AMD MMX ExtensionsFxsr_opt–fxsave/fxrstor OptimizationsPDPE1GB–GB pagesRdtscp–rdtscpLm–long Mode (x86-64)3DNOWEXT–AMD 3dnow! Extensions3dnow–3dnow!K8–opteron, Athlon64K7–athlonCONSTANT_TSC–TSC ticks at a constantUP–SMP kernel running on upPebs–precise-event Based SamplingBts–branch Trace StoreNONSTOP_TSC–TSC does not stop in C
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