Mysql Log Query Errors

MySQL master-slave synchronization is a very mature architecture, the advantages are: ① from the server can perform the query (that is, we often say reading function), reducing the pressure on the main server; ② in the backup from the main server to avoid the impact of the backup Main server service; ③ When the main server problems, you can switch to the server. So I often use this program in the deployment and implementation of the project; In view of the mysql production environment rigor, I recommend Zhang fellow MySQL source compiled here. The fourth edition updated as follows: First, an increase of ...

Usually when we use the MySQL database, often because of operational errors caused by data loss, MySQL database backup can help us to avoid due to various reasons, data loss or other problems with the database. First, the data backup shortcut Because this method has not been the official official document validation, we tentatively called the experiment. Purpose: Backup hostA host a MySQL database backup TestA, and restored to the hostB machine in the test environment: Operating System: WinNT4.0, Mysql3.22.34, phpM ...

Hello, I'm brother Tao. The event has many webmaster from the strategic level to share the idea of the site operation, just found a lot of friends once said the idea is difficult to explain the example, so I took a last year's example, to share with you how we find the problem from the log analysis, solve the problem to the final summary of lessons and optimize the operation of the site process,   At the same time I will detail the details of the way to popularize the log analysis, I hope to help friends. Website operation has a link important, that is data monitoring and data analysis, otherwise the problem does not know ...

Vanilla is a very flexible php+mysql open source forum. It is characterized by a variety of configurations, functions, operating interface style is very simple, elegant. In addition vanilla default will list all posts directly in the homepage, according to the chronological order, put the newest discussion post in the front style similar to the blog. Vanilla also has a strong extensibility that can be extended through plug-ins. Vanilla is a open-source, pluggable, themable, multi-...

It was easy to choose a database two or three years ago. Well-funded companies will choose Oracle databases, and companies that use Microsoft products are usually SQL Server, while budget-less companies will choose MySQL. Now, however, the situation is much different. In the last two or three years, many companies have launched their own Open-source projects to store information. In many cases, these projects discard traditional relational database guidelines. Many people refer to these items as NoSQL, the abbreviation for "not only SQL." Although some NoSQL number ...

The intermediary transaction SEO diagnoses Taobao guest Cloud host technology Hall CMS article PHPCMS Content Management System Brief Introduction: Phpcms is an open source PHP development framework. 　　PHPCMS consists of more than 20 functional modules including content model, member, ask, topic, Finance, order, advertisement, mail subscription, short message, custom form, whole station search etc., built-in news, picture, download, information, product 5 big content model. PHPCMS uses modular development to support custom content models and Membership modules ...

A task scheduling system is being developed to solve the task management, scheduling and monitoring under the large data platform. 　　Timed triggers and dependency triggers. 　　System module: JobManager: Master of the dispatch system, provide RPC service, receive and process all the operations submitted by Jobclient/web, communicate with metadata, maintain job metadata, and maintain, Trigger, dispatch and monitor the unified configuration of the task; Jobmonitor: Monitoring the running job status, monitoring task pool 、...

In mailbox rapid expansion process, one of the performance problems is the MongoDB database level write lock, the time spent in the lock waiting process, directly reflects the user's use of the service process delay. To address this long-standing problem, we decided to migrate a common set of MongoDB (storing mail-related data) to a separate cluster. According to our inference, this will reduce the lock latency by 50%, and we can add more fragments, and we expect to be able to optimize and manage different types of data independently. We start from Mon ...

The intermediary transaction SEO diagnoses Taobao guest Cloud host Technology Hall website completes, the maintenance and the management becomes the work which needs to carry on continuously. 　　In this chapter, the site will be optimized for internal links, efficient maintenance, PR upgrade way to introduce. First, optimize the internal links of the site two, the site efficient maintenance of three common sense three, improve the site PageRank have a coup four, site exchange links to beware of counterfeit five, against the vulgar ban on the site's illegal content six, simple configuration let Web server impregnable ...

Opennebula:what ' snewin5.4 Chinese version. Opennebula 5.4 (this version, named Medusa, the ogre in Ancient Greek mythology) is the third version of the Opennebula 5 series. As we maintain a high level of attention to the needs of the community, we also devote a great deal of effort to enhancing the key functional points described in the 5.2 continuity plan. In general, almost every Opennebula component is focused on usability and functionality enhancements, and reduces API changes to a micro ...