redis performance tips

) name:@"IdleNotification" object:nil]; NSNotification *notification = [NSNotification notificationWithName:@"IdleNotification" object:nil]; [[NSNotificationQueue defaultQueue] enqueueNotification:notification 　　postingStyle:NSPostWhenIdle];} Five, memory optimization Use Autorelease pool to reduce memory spikes Six, Code details optimization 1, not in the viewwillapear time-consuming operation 2. If the key code is more efficient with C/C + + Seven, picture optim

This article is mainly to share with you the PHP performance optimization tips, hoping to help you write better PHP code. (1) foreach is more efficient, instead of using foreach as a while and for loop; (2) Inside the loop do not declare variables, especially objects such variables; (3) in multiple nested loops, if possible, the longest cycle should be placed in the inner layer, the shortest loop in the

Tips for improving PostgreSQL Performance In a (poor) PostgreSQL query, only a small change is required (ANY (ARRAY [...]). to ANY (VALUES (...))) the query time can be reduced from 20 s to 0.2 s. From the simplest use of explain analyze, to the use of EXPLAIN s community, there will be a hundred times of learning time investment to return. Use ipvs to monitor slow ipvs queries Earlier this week, a primary

Performance Tuning is not a simple task. There is no omnipotent solution at all, but you can use some basic principles to implement it. In general, performance tuning is the role of DBA. however, DBA does not have time to carefully check every change made to the stored procedure. so learning some basic tuning may help you save the effort of rewriting.CodeTime.I have listed 15 items here. When writing code

Six tips for parsing MySQL database performance optimization bitsCN.com database tables have indexing and error prevention mechanisms on the surface. However, a simple query takes a long time. Web applications may run well in the development environment, but are equally bad in the product environment. If you are a database administrator, you may have encountered the above situation at a certain stage. There

Six tips for MySQL database performance optimization: bitsCN.com On the surface of the database table, there is an index and error prevention mechanism. However, a simple query takes a long time. Web applications may run well in the development environment, but are equally bad in the product environment. If you are a database administrator, you may have encountered the above situation at a certain stage.

The article is the domestic leading ITOM management platform supplier OneAPM compile renders.Are you a webmaster or a web developer? Want to create an ultra-fast website?Today we look at JavaScript, the magic and complexity of technology. It enriches the content of the site, but the performance problems that often occur degrade the user's experience. The best end-user experience has proven to improve website conversion rates, Google search rankings, a

configuration.Linux is rich, powerful, and flexible, and you can do a variety of tasks with it, and in this article we'll discuss some tips for improving the performance of Linux servers.1. Tuning the Linux kernel elevator algorithm for disk I/OAfter selecting the file system, there are some kernel and mount options that may affect its performance, one of which

You have completed your brand's new application, and everything works like a charm. To use your network. Everyone is happy.Then, suddenly, an explosive user killed your MySQL server and your website was closed. What's wrong? How can you stop it?The following are some tips for MySQL performance optimization, which will help you and your database.Focus on In the early stages of development, you should know th

First, when doing the Java interface Performance test, the scene appears in the operation: Code-60990 error:two communication error:function Two_way_comm_post_message/two_way_ COMM_POST_MESSAGE_EX failed. Errorand Code-10343 error:communication Error:cannot send the message since reached the shared memory buffer max size error, general resolution of the party Law is as follows:Possible reasons to be closed:The shared memory cache overflows, causing pr

|grep "model name"Second, using Tcmalloc to optimize the performance of NginxThree, nginx kernel parameter optimizationThe optimization of Nginx kernel parameters is mainly based on the optimization of kernel parameters for Nginx application in Linux system.An example of optimization is given below for reference:Net.ipv4.tcp_max_tw_buckets = 6000Net.ipv4.ip_local_port_range = 1024 65000Net.ipv4.tcp_tw_recyle = 1Net.ipv4.tcp_tw_reuse = 1Net.ipv4.tcp_s

Thanks to the delivery of gadenstarNews source: Simplified translation + ModificationWebsite performance is a key factor for any successful website. Today, WordPress is becoming more popular than ever before. The 11 tips mentioned here to improve WordPress speed and performance may be useful to you. 1. Upgrade Wordpress to the latest version (excluding beta --#

From a workload analysis to an index of three rules, these expert insights will definitely make your MySQL server scream.In all relational databases, MySQL has been proven to be a complete beast, as long as the notification stops running it will never allow you to wait a second, put your application in a dilemma, and your work will be exposed to great risk.But the truth is that normal errors are within range of MySQL performance errors. So in order fo

didTimeout return a Boolean value that indicates whether the specified time expires. This means that if the callback function is triggered by a specified time expiration, you will get two results. The Timeremaining method returns 0 Didtimeout property equals True Therefore, if the callback function executes, there are two reasons: the current frame has idle time, or the specified time is up.function Mynonessentialwork (deadline) {while ((deadline.timeremaining () > 0 | | dead

not ' t your own and you ' re unable to use an attribute, a jsonconverter can still be used B Y creating your own icontractresolver. Public classConvertercontractresolver:defaultcontractresolver { Public New Static ReadOnlyConvertercontractresolver Instance =NewConvertercontractresolver (); protected Overridejsoncontract createcontract (Type objectType) {jsoncontract contract=Base. Createcontract (ObjectType); //This'll is called once and then cached if(ObjectType = =typeof(Date

limit on key and value data storage length. 3. Space shrinkageUnfortunately, map does not shrink the "no longer used" space. Even if you delete all the key values, it still retains memory space for later use.Even if all the data is emptied, the space is still not released. The workaround is to cancel the 23-line comment, or replace it with a new map object. Tip: If you use a Map object for a long time (for example, as a cache container), it might be better to occasionally replace

Three Tips for improving web page performance and improving web page skills1. Set the display attributeFirst, set the element to display:None(Needs to be re-painted once), Then perform 100 operations on the node, and then restore the display (one re-arrangement and re-painting are required ). In this way, you can use two re-renders to replace up to 100 re-renders. The display attribute of the element is vis

PHP development tips for improving performance 1. use commas to connect strings instead of periods Echo "aaa". "bbb" Echo "aaa", "bbb "; 2. double quotation marks are used when a string contains a variable. 3. require is faster than require_once 4. calculate the cycle length in advance 5. use the foreache loop instead of the while active for loop (execution speed: foreache 6. for fil

After using the Lightroom for a period of time, feel more and more slowly, or because of a wide range of work, hoping to improve the efficiency of LR? Here are 10 tips from the founder of SLR Lounge, a foreign website, without installing programs that can directly enhance the speed and efficiency of LR software (for reading convenience, Order of Change slightly): 　　(i) Increased speed of pick-up (cache) To edit–> preference, in the pop-u

Here are some tips I've summed up, just for reference. The following code is basically in the jquery source can be seen, if the wrong place, please point out. Use the source method as much as possible JavaScript is an explanatory language and is slower to execute than a compiled language. The way the browser has been implemented, don't go through it again. In addition, the browser has implemented a number of methods in the algorithm has done a lot