Label:MySQL Database optimization pt-query-digest use I. Introduction of PT-QUERY-DIGEST Tools Pt-query-digest is a tool for analyzing MySQL slow query, which can analyze Binlog, general log, Slowlog, or through show Processlist or the MySQL protocol data captured by Tcpdump is analyzed. The analysis results can be exported to a file, the analysis process is the
Lai Yonghao (http://laiyonghao.com)
Md5.digest Introduction
MD5 Algorithm (http://en.wikipedia.org/wiki/MD5) has been one of the most widely used information digest algorithm, commonly used to check errors, such as the command md5sum.
$ md5sum protobuf-2.4.1.tar.gzdc84e9912ea768baa1976cb7bbcea7b5 protobuf-2.4.1.tar.gz
When we transfer the protobuf-2.4.1.tar.gz over the network, we can verify it at the othe
Tcpdump pt-query-digest common operations,
Tcpdump pt-query-digest Common OperationsTcpdump pt-query-digest
Objective:
Use the tcpdump command to capture data packets according to certain rules, and then dump them to intermediate files. Use pt-query-digest to analyze intermediate files according to certain rules.Tcpdum
1. Introduction to ToolsPt-query-digest is a tool for analyzing slow queries for MySQL, which analyzes Binlog, general log, Slowlog, It can also be analyzed using showprocesslist or MySQL protocol data crawled by tcpdump. The analysis results can be exported to a file, the analysis process is the parameters of the query statement, and then the parameterized query after the grouping statistics, statistics of the query execution time, frequency, percent
I. Introduction of PT-QUERY-DIGEST ToolsPt-query-digest is a tool for analyzing MySQL slow query, which can analyze Binlog, general log, Slowlog, or through show Processlist or the MySQL protocol data captured by Tcpdump is analyzed. The analysis results can be exported to a file, the analysis process is the parameters of the query statement, and then the parameterized query after the grouping statistics, s
This article is primarily geared towards those who are just beginning to learn angularjs and want to understand how data binding (data-binding) works,If you are already familiar with how to use ANGULARJS, I strongly advise you not to read it.Angularjs users want to know how data-binding works, they encounter a lot of terminology.such as $wacth, $apply, $digest, dirty-checking (dirty value detection) ... Wait, what are they doing?In this article I will
AngularJS $scope inside of $watch (), $digest () and $apply () are the core functions of AngularJS, and learning angularjs must understand these functions. When binding variables in $scope to view, Angularjs automatically creates a "Watch" inside. "Watch" is used to monitor changes in variables in the ANGULARJS scope. You can create "watch" by calling the $scope. $watch () method.$scope. The $digest () func
First, briefMAC (message authentication code, messaging authentication Code algorithm) is a key hash function algorithm that is compatible with the features of the MD and SHA algorithms, and adds a key on this basis. So Mac algorithms are often called HMAC algorithms. The details of the HMAC algorithm can be found in RFC 2104 (Http://www.ietf.org/rfc/rfc2104.txt), which contains the C language implementation of the HMACMD5 algorithm.What needs to be explained here is that the
This article mainly introduces the difference between $ watch (), $ digest () and $ apply () in AngularJS. If you are interested, refer to $ watch () in AngularJS $ scope (), $ digest () and $ apply () are core functions of AngularJS. To learn about AngularJS, you must understand these functions.
When you bind a variable in $ scope to the view, AngularJS automatically creates a "Watch" internally ". "Watch
A Brief introductionANGULARJS provides a cool feature called two-way data binding, a feature that greatly simplifies how we write code. Data binding means that when any data in the view changes, the change is automatically fed back to the scope data, meaning that the scope model is automatically updated. Similarly, when the scope model changes, the data in view is updated to the most recent value. So how does Angularjs do that? When you write down an expression such as {{AModel}}, Angularjs will
Tags: completely database getting server wholeIf you ' re just completely itching to start using the This tool, here's what you need:1, a MySQL database to store query analysis data in.2, Pt-query-digest. You could as well just get the whole Percona Toolkit when you ' re at it:)3, a slow query log from a MySQL server (see the slow query log for info on getting one)4, a webserver with PHPThe first first[Email protected] anemometer]# wget percona.com/ge
PrefacePeople who have known angular know that a big feature of angular is two-way data binding. The so-called bidirectional data binding, that is, when any data in the view changes, its corresponding scope model is automatically updated, and when the scope model changes, the data in view is updated to the most recent value. So how does it work, $watch how it works, what $apply and $digest are used to do, and let's explore.browser events and angular e
The messagedigestforfile class demonstrates the generation of an md5w digest for a file. the MD5 Digest is displayed in hex using the hex class from the apachesw commonssw codec library. the call to messagedigest. getinstance ("MD5") specifies to use the MD5Algorithm. Other common algorithms are md2 and Sha.
The getdigest () method of messagedigestforfile has three parameters. the first is the inputstream o
First, simple installationwget percona.com/get/pt-query-digestchmoe u+x pt-query-digestSecond, simple useMoreReference article: Http://blog.itpub.net/29773961/viewspace-2024992/pt-query-digest is a set of tools to help DBAs manage MySQL Percona-toolkit , developed by Percona company. For log analysis, this is used to analyze slow log, in addition to the analysis of binary log, and general log.First, installationGo to the official website to select the
authorization request header information to decrypt, and compares with the user database to judge whether is legitimate, the legal will return the OK. The RFC 2617 specification in Basic authentication does not send Authentication-info head, Authentication-info Head is added in digest certification
650) this.width= 650, "src="/img/fz.gif "alt=" Copy Code "style=" Margin:0px;padding:0px;border:none; "/> 1650) this.width=650; "src="/img/fz.gif "alt
Label:Before Windows mysql5.6.20 using mysqldumpslow.pl to analyze slow logs, today saw a tool pt-query-digest, originally intended to be installed on Windows, resulting in the execution of C: \ on Windows Program Files\mysql\mysql Server 5.6\bin>pt-query-digest.pl F:\mysql\im-slow.log > F:\mysql\slow_ Report.log, waiting for half an hour will not come out results. It must be a little support for Windows, so just use Linux. 1. First install Perl, logi
Angular is a mature and powerful JavaScript framework. It is also a relatively large framework. Before mastering it, you need to understand many new concepts it has proposed. Many Web developers flock to Angular, and many face the same obstacles. How did Digest do it? Define a directive direve VE) What are the different methods? What is the difference between Service and provider?
Angular's documentation is quite good, and third-party resources are be
Compile a php application to implement Digest Authentication. Similar to basic identity authentication, you can use PHP web pages to process HTTP request header fields to match Digest Authentication information. For example, the following code uses the header () function to require the client to use basic identity authentication. you can also use the PHP web page to process HTTP request header fields to mat
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