Summary:This article specifically describes the process of developing spaceroom (our real-time multiplayer game framework), including a series of explorations and attempts, as well as some limitations on the node.js, WebKit platform itself, and the solution proposal.
"Editor's note" Node.js also created a large number of new applications, the birth of new tools. For example, based on the Node.js development
Original article: fast, easy, realtime metrics using redis bitmaps
Http://blog.getspool.com/2011/11/29/fast-easy-realtime-metrics-using-redis-bitmaps)
The important statistical data of getspool.com is calculated in real time. Redis's bitmap allows us to perform similar statistics in real time and greatly save space.
, activation_level, session_settable2 from V $ statistics_level3 where statistics_name = 'SQL monitoring ';Statistics_name session_status system_status activation_level session_s----------------------------------------------------------------------------SQL monitoring enabled typical Yes
At the same time, the control_management_pack_access parameter must be diagnostic + tuning (which is the default setting ):
Sys @ ccdb> show parameter control_mana
Demonstrate a case with the following requirements:Create a thread in the service component that is used to produce numeric values that automatically add 1 every 1 seconds and then display the updated values in real time on the interface.The steps are as follows:1, a new Android project, named as demo.2, create a new service class, for real-
PHP + jquery: display the number of online users of a website in real time. PHP + jquery: how to display the number of online users of a website in real time. This document describes how to display the number of online users of a PHP + jquery website in real
elapsed time; user and SYS refer to CPU time used only by the process.* Real is wall clock time-time from start to finish of the call. this is all elapsed time including time slices us
Provides various official and user-released code examples. For code reference, you are welcome to exchange and learn how to query the required data through the real-time bus query of yangyang Network (formerly known as "Guangzhou Asian transportation network, for example, the current location of line search, line site, and bus
### URL
Http://www.chenhaizan.cn/bus
### Ideas
Extract data based on the bu
(Page View) can be easily combined, but UV (Unique Visitor) cannot.
In distributed computing, hundreds of businesses and hundreds of thousands of URLs are used to calculate UV statistics at the same time. If you want to perform time-based statistics (merging every minute, every 5 minutes, every hour, or every day ), memory consumption is unacceptable.
At this time
This article by show according to Lin Feng to provide friendship sponsorship, starting in the mud row world. In the previous article we described how to use rsync synchronization files, this article we will introduce, how to integrate rsync and inotify to achieve real-time data synchronization. To achieve this goal, we need to take the following steps: 1, the advantages and disadvantages of rsync 2. What is
sp_executesql stored procedure, the output keyword can be used to define the variable as the return variable, where @ Name output is the return variable, @ ID indicates the input variable.
declare @sql nvarchar(500), @Name nvarchar(50),@ID nvarchar(40)set @SQL=N'select @Name=Name from LNK_ServerB_DatabaseB.DatabaseB.dbo.TableB where ID=@ID'exec sp_executesql @SQL,N'@Name nvarchar(50) output,@ID nvarchar(40)',@Name output,@ID
In addition, exec directly executes the SQL statement, which is essent
=rtc_getcounter ();//Gets the count value and calculates the current clock/*computehours*/thh=rtccount/3600;/*computeminutes*/Tmm= (rtccount%3600)/60;/*computeseconds*/Tss= (rtccount%3600)%60;This is done by Rtc_getcounter (), the function gets the count value, and then the count value is expressed in hours, minutes, seconds, respectively. Finally, you need to ca
I. architecture of the billing systemThe design of the VoIP Billing system follows the design principle of real-time Internet billing, and features real-time, stability, reliability, portability, and scalability. The function design not only takes into account the basic functions of the Internet billing system, it also
should we design dynamic rankings?For example, the monthly ranking is actually the ranking from the current time to the past 30 days,Because time is time changing, the time dimension changes every second.Answer the question from lan Hao.It is a game. It generally takes 10-40 seconds to play a game,When the game is fin
current number of online users, the current transaction amount, and the current exchange rate. The front-end page needs to refresh and obtain the latest data in real time. Here we will introduce the use of jQuery and PHP in combination with examples to achieve dynamic digital display.
This example assumes that the current number of online users needs to be dynamically displayed on the page (the entire page
method:Select Dbms_sqltune.report_tuning_task (' Bigtable_jointo_smalltab_sql ') from dual;/* create indexes based on optimization results */Create INDEX Idx_smalltable_tablename on smalltable (table_name) tablespace users;Create INDEX Idx_bigtable_tablename on bigtable (object_name) tablespace users;3 real-time SQL monitoringReal-time SQL monitoring (
Video Learning Website learning duration real-time recording-performance optimization practices
I. Application Scenario Description
The system provides services for teachers to learn online. The video learning website supports online video learning for teachers. During video learning, the learning process of teachers is recorded. Each topic corresponds to multiple teaching videos, and the duration of each t
1, Inotify+rsync real-time synchronization1. IntroductionInotify-tools is a powerful, granular, asynchronous file system event monitoring mechanism that can be used to monitor file system events. Inotify-tools is written in C, except that it requires the kernel to support inotify, and does not depend on others. Inotify-tools provides two tools, one is inotifywait, it is used to monitor file or directory cha
PHP + jquery real-time display of online website users
This article mainly introduces PHP + jquery's method of displaying the number of online users in real time, and analyzes in detail the principle and code implementation skills of displaying the number of online users in real
criteria, and the corresponding grouping is found. However, the intermediate table we get is the group number. Then we have to convert the corresponding time according to the group number: Logtime=group_num*5/1440+to_date (date, ' Yyyy-mm-dd ') So: SELECT (To_date (DATE, ' yyyy-mm-dd hh24:mi ') + Group_num * 5/(each)) LogTimeSo we can query the condition by the point of time 1. The specific SQL statement
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