types of executions

Label:Original: Plsql_ monitor the number of executions and frequencies of some SQL2014-12-25 Created by Abalone newI. SummaryIn Oracle database application tuning, the number of executions/frequencies of an SQL is often a concern, either because a SQL execution is too frequent, or because the application design is flawed, it needs to be optimized for business logic, or is caused by business specificity.If

Label:2014-12-25 Created by Abalone newI. Summary In Oracle database application tuning, the number of executions/frequencies of an SQL is often a concern, either because a SQL execution is too frequent, or because the application design is flawed, it needs to be optimized for business logic, or is caused by business specificity.If you execute frequent SQL, you tend to encounter some concurrency problems.So how to see the Oracle database of a SQ

Tags: ar data problem SP algorithm AD C database sqlShow status like ' com_% ';Com_select | 1 Number of times a select operation is performed, only one query accumulates 1Com_insert | 0 the number of times the insert operation was performed, and for inserts that were bulk inserted, only one timeCom_update | 0 Number of update operations performedCom_delete | 0 Number of Delete operations performedThe above parameters accumulate for all the table operations of the storage engine, the following pa

jquery Click Nested event repeat registration multiple execution issue resolution reprinted from Sina Blog: http://blog.sina.com.cn/s/blog_4f925fc30100ln1o.html jquery The Click event in the nested click repeatedly registers the internal click event, resulting in repeated executions. such as $ (...). Click (function () {$ (...). Click (function () {...//multiple execution}); });Workaround one: Each time the execution is finished, unbind, such as$(.

JQuery binds a click event to an element for multiple executions. jqueryclick Original binding method: $("#sdfsd").on("click",function(e){ ***** }); This method will only add new methods in the original click method; Solution: Change the binding method: $("#sdfsd").unbind("click").click(function(e){ ***** }); Unbind the click method bound to the element before binding the new click Method The dynamically generated element of jquery automatically execu

Binding events (multiple executions, one-time execution function)

I just saw an SQL statement to share with you. This SQL statement allows you to view the statements that take the longest time in a database and the number of executions in a certain period of time. Copy the following statement to the production database for execution, The results help us analyze the pages on which the system is most frequently used and which SQL statements need to be optimized. It is helpful for system usage and performance t

First of all my situation online methods are useless, this is the problem of repeatedly loading the service, specifically do not sayHere's how to fix it:To get a profile individually, you need to automatically load all of them inside. Don't forget to change web. XML to scan itThere are three different methods in the configuration document, with the custom one, as followsIn Cron, the reverse is the month, day, and minute.AboveSpring Configuration Auto-load workaround for multiple

Window. onresize event-specific event binder v0.1, used to solve the lteie8 amp; chrome and other bugs that may occur when the native window. resize event is executed multiple times. The Code is as follows: /*** Window. onresize event-specific event binder v0.1 Alucelx* Http://www.cnblogs.com/Alucelx/archive/2011/10/20/2219263.html* * This vulnerability is used to solve the multiple execution bugs of lte ie8 chrome and other native window. resize events that may occur. * * * A

On the page, define the onresize event for the window object. When the window is scaled out, the onresize method is executed multiple times, affecting the page performance.I checked some information on the Internet, saying that in ie and opera, the resize event is triggered as long as the border of the window moves a pixel. in mozilla, the resize event is triggered only when the size of the window is changed.It is ideal to trigger the resize event when the window size is changed.I think the onre

var p1 = new Promise (function (resolve,reject) {SetTimeout (function () {Console.log (' 1 ');Resolve ()},3000)})function P2 () {return new Promise (function (resolve,reject) {SetTimeout (function () {Console.log ("2");Resolve ();},2000)})}Function P3 () {return new Promise (function (resolve,reject) {SetTimeout (function () {Console.log ("3");Resolve ();},1000)})}function P4 () {return new Promise (function (resolve,reject) {SetTimeout (function () {Console.log ("4");Resolve ();},500)})}P1.then

The click effect of a tag here is originally to jump to the Baidu page, but we can remove the default behavior by the way the Click event will not be followed.Sometimes you encounter multiple events on the same tab, and if you just want to execute the first event and discard the subsequent events, you can add a piece of code to block:How jquery blocks post-bound eventsYour code has completed the event binding during page loading, there is no way to block post-bind events, but you can delete the

; } } } } return true; } functionHandlewresize (e) {if(Resizeonce ()) {returnF.apply ( This, [E]); } } This. each (function() { if( This==window) { $( This). Resize (handlewresize); } Else { $( This). Resize (f); } }); return This; }; }) (JQuery); This is to find a jquery plugin source on the Internet, you can save him as jquery.wresize.js, then reference it on your page and do the f

Tags: io file data sp CTI on C size RIf the file is thousands of megabytes, or millions of megabytes, you will need to parallelize the backup of this file, usually, a channel can read only one file, but with a multi-segment keyword can change this behavior:Run {Allocate channel T1 type SBT;Allocate channel T2 type SBT;Allocate channel t3 type SBT;Allocate channel T4 type SBT;Backup as compressed backupset datafile section size 10g;}This script will start 4 channels, each reading a 10GB segment o

Data type Integral typeFloating point TypeBoolean typeStringArrayObject Conversion between types(int) $val; Convert to integral type (float) $val; Convert to floating point type (string) $val; Convert to String (bool) $val; Convert to Boolean type (array) $val; Converts an array that contains only one element of $val. [$val] (object) $val; Convert to an object, the scalar property of the object points to $val. {scalar: $val} Get typeUse the functio

Data Types supported by Mysql (Summary of column types) and mysql Data Types I. Numerical type Mysql supports all numeric types in standard SQL, including strict data types (INTEGER, SMALLINT, DECIMAL, NUMBERIC), and approximate numeric data

Four basic data types in javascript: numeric values (integers and real numbers), string literals (characters or values enclosed by "" or "), Boolean (make True or false), and null values. The data in the basic type of JavaScript can be constants or variables. Because JavaScript takes the form of a weak type, a variable or constant of a data does not have to be declared first, but rather the type of its data when used or assigned. Of course, you can de

Basic data types and packaging types of JavaScript systems, javascript Data Types Preface Javascript data types can be divided into two types: original type and reference type. The original type is also known as the basic type or simple type. Because it occupies a fixed spac

This paper is a collation of knowledge points in multi-threading in previous Studies.Queues in multiple threads are: serial queue, concurrent queue, Global queue, home row .The methods performed are synchronous execution and asynchronous execution .

There are two types of Java virtual machines that can be handled, one is the original type (Primitive Types) and one is the reference type (Reference Types).Correspondingly, there are two types of values that have primitive values (Primitive values) and reference values (Reference values) that can be used for variable